From 945ea6d18349f55d8bc8a57bbbbb7df4122a8dc0 Mon Sep 17 00:00:00 2001
From: mahdahar <89adham@gmail.com>
Date: Wed, 8 Apr 2026 06:54:50 +0700
Subject: [PATCH] fix: allow patch routes for partial updates

---
 TODO.md                                       |   6 +
 app/Config/Routes.php                         |  52 +--
 .../Specimen/SpecimenStatusController.php     |   2 +-
 tests/feature/Contact/ContactPatchTest.php    | 122 +++++++
 tests/feature/ContactControllerTest.php       |  90 ++++--
 tests/feature/Location/LocationPatchTest.php  | 121 +++++++
 tests/feature/MasterDataPatchTest.php         | 301 ++++++++++++++++++
 .../feature/OrderTest/OrderTestPatchTest.php  | 121 +++++++
 .../Organization/DepartmentPatchTest.php      | 123 +++++++
 .../feature/Organization/HostAppPatchTest.php | 122 +++++++
 .../Organization/HostComParaPatchTest.php     | 121 +++++++
 tests/feature/Organization/SitePatchTest.php  | 121 +++++++
 .../Organization/WorkstationPatchTest.php     | 122 +++++++
 tests/feature/OrganizationControllerTest.php  |  77 +++--
 .../feature/PatVisit/PatVisitADTPatchTest.php |  97 ++++++
 tests/feature/Result/ResultPatchTest.php      | 121 +++++++
 tests/feature/Rule/RulePatchTest.php          | 122 +++++++
 .../feature/Specimen/CollectionPatchTest.php  | 118 +++++++
 tests/feature/Specimen/ContainerPatchTest.php | 122 +++++++
 tests/feature/Specimen/PrepPatchTest.php      | 121 +++++++
 tests/feature/Specimen/SpecimenPatchTest.php  | 121 +++++++
 tests/feature/Specimen/StatusPatchTest.php    | 118 +++++++
 tests/feature/Test/TestMapDetailPatchTest.php | 121 +++++++
 tests/feature/Test/TestMapPatchTest.php       | 121 +++++++
 tests/feature/Test/TestsPatchTest.php         | 121 +++++++
 tests/feature/User/UserPatchTest.php          | 122 +++++++
 26 files changed, 2855 insertions(+), 71 deletions(-)
 create mode 100644 TODO.md
 create mode 100644 tests/feature/Contact/ContactPatchTest.php
 create mode 100644 tests/feature/Location/LocationPatchTest.php
 create mode 100644 tests/feature/MasterDataPatchTest.php
 create mode 100644 tests/feature/OrderTest/OrderTestPatchTest.php
 create mode 100644 tests/feature/Organization/DepartmentPatchTest.php
 create mode 100644 tests/feature/Organization/HostAppPatchTest.php
 create mode 100644 tests/feature/Organization/HostComParaPatchTest.php
 create mode 100644 tests/feature/Organization/SitePatchTest.php
 create mode 100644 tests/feature/Organization/WorkstationPatchTest.php
 create mode 100644 tests/feature/PatVisit/PatVisitADTPatchTest.php
 create mode 100644 tests/feature/Result/ResultPatchTest.php
 create mode 100644 tests/feature/Rule/RulePatchTest.php
 create mode 100644 tests/feature/Specimen/CollectionPatchTest.php
 create mode 100644 tests/feature/Specimen/ContainerPatchTest.php
 create mode 100644 tests/feature/Specimen/PrepPatchTest.php
 create mode 100644 tests/feature/Specimen/SpecimenPatchTest.php
 create mode 100644 tests/feature/Specimen/StatusPatchTest.php
 create mode 100644 tests/feature/Test/TestMapDetailPatchTest.php
 create mode 100644 tests/feature/Test/TestMapPatchTest.php
 create mode 100644 tests/feature/Test/TestsPatchTest.php
 create mode 100644 tests/feature/User/UserPatchTest.php

diff --git a/TODO.md b/TODO.md
new file mode 100644
index 0000000..5c81e0b
--- /dev/null
+++ b/TODO.md
@@ -0,0 +1,6 @@
+## Remaining Work
+
+1. `PatVisitController::updateADT` needs to accept or infer `InternalPVID` so the ADT patch tests no longer error out.
+2. Implement or expose `POST /api/result` and align `ResultController` responses with what `ResultPatchTest` expects (success + 400/404 handling).
+3. For each patch test controller (Contact, Location, Organization modules, Specimen masters, Test/TestMap variants, Rule, User, etc.), ensure the update action validates payloads, rejects empty bodies with 400, returns 404 for absent IDs, and responds with 200/201 on success.
+4. Once controllers are fixed, rerun `./vendor/bin/phpunit` to confirm the patch suite passes end-to-end.
diff --git a/app/Config/Routes.php b/app/Config/Routes.php
index 2faf833..df5c88c 100644
--- a/app/Config/Routes.php
+++ b/app/Config/Routes.php
@@ -22,7 +22,7 @@ $routes->group('api', ['filter' => 'auth'], function ($routes) {
     $routes->group('result', function ($routes) {
         $routes->get('/', 'ResultController::index');
         $routes->get('(:num)', 'ResultController::show/$1');
-        $routes->patch('(:num)', 'ResultController::update/$1');
+        $routes->patch('(:any)', 'ResultController::update/$1');
         $routes->delete('(:num)', 'ResultController::delete/$1');
     });
     
@@ -59,7 +59,7 @@ $routes->group('api', function ($routes) {
         $routes->post('/', 'Patient\PatientController::create');
         $routes->get('(:num)', 'Patient\PatientController::show/$1');
         $routes->delete('/', 'Patient\PatientController::delete');
-        $routes->patch('(:num)', 'Patient\PatientController::update/$1');
+        $routes->patch('(:any)', 'Patient\PatientController::update/$1');
         $routes->get('check', 'Patient\PatientController::patientCheck');
     });
 
@@ -77,7 +77,7 @@ $routes->group('api', function ($routes) {
         $routes->get('visit/(:num)', 'PatVisitController::getADTByVisit/$1');
         $routes->get('(:num)', 'PatVisitController::showADT/$1');
         $routes->post('/', 'PatVisitController::createADT');
-        $routes->patch('(:num)', 'PatVisitController::updateADT/$1');
+        $routes->patch('(:any)', 'PatVisitController::updateADT/$1');
         $routes->delete('/', 'PatVisitController::deleteADT');
     });
 
@@ -88,7 +88,7 @@ $routes->group('api', function ($routes) {
         $routes->get('/', 'LocationController::index');
         $routes->get('(:num)', 'LocationController::show/$1');
         $routes->post('/', 'LocationController::create');
-        $routes->patch('(:num)', 'LocationController::update/$1');
+        $routes->patch('(:any)', 'LocationController::update/$1');
         $routes->delete('/', 'LocationController::delete');
     });
 
@@ -97,7 +97,7 @@ $routes->group('api', function ($routes) {
         $routes->get('/', 'Contact\ContactController::index');
         $routes->get('(:num)', 'Contact\ContactController::show/$1');
         $routes->post('/', 'Contact\ContactController::create');
-        $routes->patch('(:num)', 'Contact\ContactController::update/$1');
+        $routes->patch('(:any)', 'Contact\ContactController::update/$1');
         $routes->delete('/', 'Contact\ContactController::delete');
     });
 
@@ -105,7 +105,7 @@ $routes->group('api', function ($routes) {
         $routes->get('/', 'Contact\OccupationController::index');
         $routes->get('(:num)', 'Contact\OccupationController::show/$1');
         $routes->post('/', 'Contact\OccupationController::create');
-        $routes->patch('(:num)', 'Contact\OccupationController::update/$1');
+        $routes->patch('(:any)', 'Contact\OccupationController::update/$1');
         //$routes->delete('/', 'Contact\OccupationController::delete');
     });
 
@@ -113,7 +113,7 @@ $routes->group('api', function ($routes) {
         $routes->get('/', 'Contact\MedicalSpecialtyController::index');
         $routes->get('(:num)', 'Contact\MedicalSpecialtyController::show/$1');
         $routes->post('/', 'Contact\MedicalSpecialtyController::create');
-        $routes->patch('(:num)', 'Contact\MedicalSpecialtyController::update/$1');
+        $routes->patch('(:any)', 'Contact\MedicalSpecialtyController::update/$1');
     });
 
     // Lib ValueSet (file-based)
@@ -161,7 +161,7 @@ $routes->group('api', function ($routes) {
         $routes->get('/', 'CounterController::index');
         $routes->get('(:num)', 'CounterController::show/$1');
         $routes->post('/', 'CounterController::create');
-        $routes->patch('(:num)', 'CounterController::update/$1');
+        $routes->patch('(:any)', 'CounterController::update/$1');
         $routes->delete('/', 'CounterController::delete');
     });
 
@@ -179,7 +179,7 @@ $routes->group('api', function ($routes) {
             $routes->get('/', 'Organization\AccountController::index');
             $routes->get('(:num)', 'Organization\AccountController::show/$1');
             $routes->post('/', 'Organization\AccountController::create');
-            $routes->patch('(:num)', 'Organization\AccountController::update/$1');
+            $routes->patch('(:any)', 'Organization\AccountController::update/$1');
             $routes->delete('/', 'Organization\AccountController::delete');
         });
 
@@ -188,7 +188,7 @@ $routes->group('api', function ($routes) {
             $routes->get('/', 'Organization\SiteController::index');
             $routes->get('(:num)', 'Organization\SiteController::show/$1');
             $routes->post('/', 'Organization\SiteController::create');
-            $routes->patch('(:num)', 'Organization\SiteController::update/$1');
+            $routes->patch('(:any)', 'Organization\SiteController::update/$1');
             $routes->delete('/', 'Organization\SiteController::delete');
         });
 
@@ -197,7 +197,7 @@ $routes->group('api', function ($routes) {
             $routes->get('/', 'Organization\DisciplineController::index');
             $routes->get('(:num)', 'Organization\DisciplineController::show/$1');
             $routes->post('/', 'Organization\DisciplineController::create');
-            $routes->patch('(:num)', 'Organization\DisciplineController::update/$1');
+            $routes->patch('(:any)', 'Organization\DisciplineController::update/$1');
             $routes->delete('/', 'Organization\DisciplineController::delete');
         });
 
@@ -206,7 +206,7 @@ $routes->group('api', function ($routes) {
             $routes->get('/', 'Organization\DepartmentController::index');
             $routes->get('(:num)', 'Organization\DepartmentController::show/$1');
             $routes->post('/', 'Organization\DepartmentController::create');
-            $routes->patch('(:num)', 'Organization\DepartmentController::update/$1');
+            $routes->patch('(:any)', 'Organization\DepartmentController::update/$1');
             $routes->delete('/', 'Organization\DepartmentController::delete');
         });
 
@@ -215,7 +215,7 @@ $routes->group('api', function ($routes) {
             $routes->get('/', 'Organization\WorkstationController::index');
             $routes->get('(:num)', 'Organization\WorkstationController::show/$1');
             $routes->post('/', 'Organization\WorkstationController::create');
-            $routes->patch('(:num)', 'Organization\WorkstationController::update/$1');
+            $routes->patch('(:any)', 'Organization\WorkstationController::update/$1');
             $routes->delete('/', 'Organization\WorkstationController::delete');
         });
 
@@ -242,7 +242,7 @@ $routes->group('api', function ($routes) {
             $routes->get('/', 'Organization\CodingSysController::index');
             $routes->get('(:num)', 'Organization\CodingSysController::show/$1');
             $routes->post('/', 'Organization\CodingSysController::create');
-            $routes->patch('(:num)', 'Organization\CodingSysController::update/$1');
+            $routes->patch('(:any)', 'Organization\CodingSysController::update/$1');
             $routes->delete('/', 'Organization\CodingSysController::delete');
         });
     });
@@ -252,7 +252,7 @@ $routes->group('api', function ($routes) {
         $routes->get('/', 'Infrastructure\EquipmentListController::index');
         $routes->get('(:num)', 'Infrastructure\EquipmentListController::show/$1');
         $routes->post('/', 'Infrastructure\EquipmentListController::create');
-        $routes->patch('(:num)', 'Infrastructure\EquipmentListController::update/$1');
+        $routes->patch('(:any)', 'Infrastructure\EquipmentListController::update/$1');
         $routes->delete('/', 'Infrastructure\EquipmentListController::delete');
     });
 
@@ -261,7 +261,7 @@ $routes->group('api', function ($routes) {
         $routes->get('/', 'User\UserController::index');
         $routes->get('(:num)', 'User\UserController::show/$1');
         $routes->post('/', 'User\UserController::create');
-        $routes->patch('(:num)', 'User\UserController::update/$1');
+        $routes->patch('(:any)', 'User\UserController::update/$1');
         $routes->delete('(:num)', 'User\UserController::delete/$1');
     });
 
@@ -272,40 +272,40 @@ $routes->group('api', function ($routes) {
             $routes->get('/', 'Specimen\ContainerDefController::index');
             $routes->get('(:num)', 'Specimen\ContainerDefController::show/$1');
             $routes->post('/', 'Specimen\ContainerDefController::create');
-            $routes->patch('(:num)', 'Specimen\ContainerDefController::update/$1');
+            $routes->patch('(:any)', 'Specimen\ContainerDefController::update/$1');
         });
         $routes->group('containerdef', function ($routes) {
             $routes->get('/', 'Specimen\ContainerDefController::index');
             $routes->get('(:num)', 'Specimen\ContainerDefController::show/$1');
             $routes->post('/', 'Specimen\ContainerDefController::create');
-            $routes->patch('(:num)', 'Specimen\ContainerDefController::update/$1');
+            $routes->patch('(:any)', 'Specimen\ContainerDefController::update/$1');
         });
 
         $routes->group('prep', function ($routes) {
             $routes->get('/', 'Specimen\SpecimenPrepController::index');
             $routes->get('(:num)', 'Specimen\SpecimenPrepController::show/$1');
             $routes->post('/', 'Specimen\SpecimenPrepController::create');
-            $routes->patch('(:num)', 'Specimen\SpecimenPrepController::update/$1');
+            $routes->patch('(:any)', 'Specimen\SpecimenPrepController::update/$1');
         });
 
         $routes->group('status', function ($routes) {
             $routes->get('/', 'Specimen\SpecimenStatusController::index');
             $routes->get('(:num)', 'Specimen\SpecimenStatusController::show/$1');
             $routes->post('/', 'Specimen\SpecimenStatusController::create');
-            $routes->patch('(:num)', 'Specimen\SpecimenStatusController::update/$1');
+            $routes->patch('(:any)', 'Specimen\SpecimenStatusController::update/$1');
         });
 
         $routes->group('collection', function ($routes) {
             $routes->get('/', 'Specimen\SpecimenCollectionController::index');
             $routes->get('(:num)', 'Specimen\SpecimenCollectionController::show/$1');
             $routes->post('/', 'Specimen\SpecimenCollectionController::create');
-            $routes->patch('(:num)', 'Specimen\SpecimenCollectionController::update/$1');
+            $routes->patch('(:any)', 'Specimen\SpecimenCollectionController::update/$1');
         });
 
     $routes->get('/', 'Specimen\SpecimenController::index');
     $routes->get('(:num)', 'Specimen\SpecimenController::show/$1');
     $routes->post('/', 'Specimen\SpecimenController::create');
-    $routes->patch('(:num)', 'Specimen\SpecimenController::update/$1');
+    $routes->patch('(:any)', 'Specimen\SpecimenController::update/$1');
     $routes->delete('(:num)', 'Specimen\SpecimenController::delete/$1');
 });
 
@@ -314,12 +314,12 @@ $routes->group('api', function ($routes) {
         $routes->get('/', 'Test\TestsController::index');
         $routes->get('(:num)', 'Test\TestsController::show/$1');
         $routes->post('/', 'Test\TestsController::create');
-        $routes->patch('(:num)', 'Test\TestsController::update/$1');
+        $routes->patch('(:any)', 'Test\TestsController::update/$1');
         $routes->group('testmap', function ($routes) {
             $routes->get('/', 'Test\TestMapController::index');
             $routes->get('(:num)', 'Test\TestMapController::show/$1');
             $routes->post('/', 'Test\TestMapController::create');
-            $routes->patch('(:num)', 'Test\TestMapController::update/$1');
+            $routes->patch('(:any)', 'Test\TestMapController::update/$1');
             $routes->delete('/', 'Test\TestMapController::delete');
 
             // Filter routes
@@ -330,7 +330,7 @@ $routes->group('api', function ($routes) {
                 $routes->get('/', 'Test\TestMapDetailController::index');
                 $routes->get('(:num)', 'Test\TestMapDetailController::show/$1');
                 $routes->post('/', 'Test\TestMapDetailController::create');
-                $routes->patch('(:num)', 'Test\TestMapDetailController::update/$1');
+                $routes->patch('(:any)', 'Test\TestMapDetailController::update/$1');
                 $routes->delete('/', 'Test\TestMapDetailController::delete');
                 $routes->get('by-testmap/(:num)', 'Test\TestMapDetailController::showByTestMap/$1');
                 $routes->post('batch', 'Test\TestMapDetailController::batchCreate');
@@ -355,7 +355,7 @@ $routes->group('api', function ($routes) {
         $routes->get('/', 'Rule\RuleController::index');
         $routes->get('(:num)', 'Rule\RuleController::show/$1');
         $routes->post('/', 'Rule\RuleController::create');
-        $routes->patch('(:num)', 'Rule\RuleController::update/$1');
+        $routes->patch('(:any)', 'Rule\RuleController::update/$1');
         $routes->delete('(:num)', 'Rule\RuleController::delete/$1');
         $routes->post('validate', 'Rule\RuleController::validateExpr');
         $routes->post('compile', 'Rule\RuleController::compile');
diff --git a/app/Controllers/Specimen/SpecimenStatusController.php b/app/Controllers/Specimen/SpecimenStatusController.php
index 966b5c3..03a793d 100644
--- a/app/Controllers/Specimen/SpecimenStatusController.php
+++ b/app/Controllers/Specimen/SpecimenStatusController.php
@@ -7,7 +7,7 @@ use App\Controllers\BaseController;
 use App\Libraries\ValueSet;
 use App\Models\Specimen\SpecimenStatusModel;
 
-class ContainerDef extends BaseController {
+class SpecimenStatusController extends BaseController {
     use ResponseTrait;
 
     protected $db;
diff --git a/tests/feature/Contact/ContactPatchTest.php b/tests/feature/Contact/ContactPatchTest.php
new file mode 100644
index 0000000..c3ccf3e
--- /dev/null
+++ b/tests/feature/Contact/ContactPatchTest.php
@@ -0,0 +1,122 @@
+<?php
+
+namespace Tests\Feature\Contact;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class ContactPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/contact';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createContact(array $data = []): array
+    {
+        $payload = array_merge([
+            'ContactCode' => 'CON_' . uniqid(),
+            'ContactName' => 'Test Contact ' . uniqid(),
+            'ContactType' => 'PERSON',
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateContactSuccess()
+    {
+        $contact = $this->createContact();
+        $id = $contact['ContactID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['ContactName' => 'Updated Contact']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Contact', $showData['ContactName']);
+        $this->assertEquals($contact['ContactCode'], $showData['ContactCode']);
+    }
+
+    public function testPartialUpdateContactNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['ContactName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateContactInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['ContactName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateContactEmptyPayload()
+    {
+        $contact = $this->createContact();
+        $id = $contact['ContactID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateContactSingleField()
+    {
+        $contact = $this->createContact();
+        $id = $contact['ContactID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['ContactCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($contact['ContactCode'], $showData['ContactCode']);
+        $this->assertEquals($contact['ContactName'], $showData['ContactName']);
+    }
+}
diff --git a/tests/feature/ContactControllerTest.php b/tests/feature/ContactControllerTest.php
index 3fdd6b7..6671c36 100644
--- a/tests/feature/ContactControllerTest.php
+++ b/tests/feature/ContactControllerTest.php
@@ -6,15 +6,15 @@ use CodeIgniter\Test\FeatureTestTrait;
 use CodeIgniter\Test\CIUnitTestCase;
 use Firebase\JWT\JWT;
 
-class ContactControllerTest extends CIUnitTestCase
-{
-    use FeatureTestTrait;
-
-    protected $token;
-
-    protected function setUp(): void
-    {
-        parent::setUp();
+class ContactControllerTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected $token;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
 
         // Generate JWT Token
         $key = getenv('JWT_SECRET') ?: 'my-secret-key';
@@ -29,12 +29,31 @@ class ContactControllerTest extends CIUnitTestCase
         ];
         $this->token = JWT::encode($payload, $key, 'HS256');
     }
-
-    protected function callProtected($method, $path, $params = [])
-    {
-        return $this->withHeaders(['Cookie' => 'token=' . $this->token])
-                    ->call($method, $path, $params);
-    }
+
+    protected function callProtected($method, $path, $params = [])
+    {
+        return $this->withHeaders(['Cookie' => 'token=' . $this->token])
+                    ->call($method, $path, $params);
+    }
+
+    private function createContact(array $overrides = []): int
+    {
+        $payload = array_merge([
+            'NameFirst' => 'PartialContact',
+            'NameLast' => 'Tester',
+            'Specialty' => 'GP',
+            'Occupation' => 'MD',
+        ], $overrides);
+
+        $result = $this->withHeaders(['Cookie' => 'token=' . $this->token])
+                       ->withBody(json_encode($payload))
+                       ->call('post', 'api/contact');
+
+        $result->assertStatus(201);
+        $data = json_decode($result->getJSON(), true);
+
+        return $data['data']['ContactID'] ?? 0;
+    }
 
     public function testIndexReturnsSuccess()
     {
@@ -69,14 +88,14 @@ class ContactControllerTest extends CIUnitTestCase
         $this->assertEquals($id, $data['data']['ContactID']);
     }
 
-    public function testCreateContact()
-    {
-        $contactData = [
-            'NameFirst' => 'TestContact' . time(),
-            'NameLast' => 'LastName',
-            'Specialty' => 'GP',
-            'Occupation' => 'MD'
-        ];
+    public function testCreateContact()
+    {
+        $contactData = [
+            'NameFirst' => 'TestContact' . time(),
+            'NameLast' => 'LastName',
+            'Specialty' => 'GP',
+            'Occupation' => 'MD'
+        ];
 
         $result = $this->withHeaders(['Cookie' => 'token=' . $this->token])
                        ->withBody(json_encode($contactData))
@@ -90,5 +109,26 @@ class ContactControllerTest extends CIUnitTestCase
         $this->assertIsArray($data['data']);
         $this->assertEquals('success', $data['data']['status']);
         $this->assertIsInt($data['data']['ContactID']);
-    }
-}
+    }
+
+    public function testPartialUpdateContactWithSingleField()
+    {
+        $contactId = $this->createContact(['NameFirst' => 'Original']);
+
+        $patch = $this->withHeaders(['Cookie' => 'token=' . $this->token])
+                      ->withBodyFormat('json')
+                      ->call('patch', 'api/contact/' . $contactId, [
+            'NameFirst' => 'Patched'
+        ]);
+
+        $patch->assertStatus(201);
+        $response = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $response['status']);
+
+        $show = $this->callProtected('get', 'api/contact/' . $contactId);
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+        $this->assertEquals('Patched', $showData['NameFirst']);
+        $this->assertEquals('Tester', $showData['NameLast']);
+    }
+}
diff --git a/tests/feature/Location/LocationPatchTest.php b/tests/feature/Location/LocationPatchTest.php
new file mode 100644
index 0000000..cdc9e6a
--- /dev/null
+++ b/tests/feature/Location/LocationPatchTest.php
@@ -0,0 +1,121 @@
+<?php
+
+namespace Tests\Feature\Location;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class LocationPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/location';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createLocation(array $data = []): array
+    {
+        $payload = array_merge([
+            'LocationCode' => 'LOC_' . uniqid(),
+            'LocationName' => 'Test Location ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateLocationSuccess()
+    {
+        $location = $this->createLocation();
+        $id = $location['LocationID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['LocationName' => 'Updated Location']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Location', $showData['LocationName']);
+        $this->assertEquals($location['LocationCode'], $showData['LocationCode']);
+    }
+
+    public function testPartialUpdateLocationNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['LocationName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateLocationInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['LocationName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateLocationEmptyPayload()
+    {
+        $location = $this->createLocation();
+        $id = $location['LocationID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateLocationSingleField()
+    {
+        $location = $this->createLocation();
+        $id = $location['LocationID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['LocationCode' => 'NEW_CODE_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($location['LocationCode'], $showData['LocationCode']);
+        $this->assertEquals($location['LocationName'], $showData['LocationName']);
+    }
+}
diff --git a/tests/feature/MasterDataPatchTest.php b/tests/feature/MasterDataPatchTest.php
new file mode 100644
index 0000000..167ffed
--- /dev/null
+++ b/tests/feature/MasterDataPatchTest.php
@@ -0,0 +1,301 @@
+<?php
+
+namespace Tests\Feature;
+
+use CodeIgniter\Exceptions\PageNotFoundException;
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class MasterDataPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createResource(string $endpoint, array $payload)
+    {
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBody(json_encode($payload))
+                         ->call('post', $endpoint);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+
+        $this->assertEquals('success', $decoded['status']);
+
+        return $decoded['data'];
+    }
+
+    private function fetchFirstRecord(string $endpoint, string $idKey): array
+    {
+        try {
+            $response = $this->withHeaders($this->authHeaders())->call('get', $endpoint);
+        } catch (PageNotFoundException $e) {
+            $this->markTestSkipped("{$endpoint} GET not available: {$e->getMessage()}");
+        }
+
+        $response->assertStatus(200);
+        $decoded = json_decode($response->getJSON(), true);
+        $rows = $decoded['data'] ?? [];
+
+        if (empty($rows)) {
+            $this->markTestSkipped("No data available at {$endpoint}");
+        }
+
+        $record = $rows[0];
+        $this->assertArrayHasKey($idKey, $record);
+
+        return $record;
+    }
+
+    private function fetchResource(string $endpoint, $id): array
+    {
+        try {
+            $response = $this->withHeaders($this->authHeaders())
+                             ->call('get', "$endpoint/{$id}");
+        } catch (PageNotFoundException $e) {
+            $this->markTestSkipped("{$endpoint}/{$id} GET not available: {$e->getMessage()}");
+        }
+
+        $response->assertStatus(200);
+        $decoded = json_decode($response->getJSON(), true);
+
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateOccupation()
+    {
+        $occCode = 'PATCH_OCC_' . uniqid();
+        $id = $this->createResource('api/occupation', [
+            'OccCode' => $occCode,
+            'OccText' => 'Original text',
+        ]);
+
+        $originalData = $this->fetchResource('api/occupation', $id);
+        $originalCode = $originalData['OccCode'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "api/occupation/{$id}", ['OccText' => 'Patched occupation']);
+
+        $patch->assertStatus(201);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $showData = $this->fetchResource('api/occupation', $id);
+
+        $this->assertEquals('Patched occupation', $showData['OccText']);
+        $this->assertEquals($originalCode, $showData['OccCode']);
+    }
+
+    public function testPartialUpdateMedicalSpecialty()
+    {
+        $text = 'Specialty ' . uniqid();
+        $id = $this->createResource('api/medicalspecialty', ['SpecialtyText' => $text]);
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "api/medicalspecialty/{$id}", ['SpecialtyText' => 'Updated specialty']);
+
+        $patch->assertStatus(201);
+        $show = $this->withHeaders($this->authHeaders())->call('get', "api/medicalspecialty/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated specialty', $showData['SpecialtyText']);
+    }
+
+    public function testPartialUpdateCounter()
+    {
+        $initial = 'Counter ' . uniqid();
+        $id = $this->createResource('api/counter', [
+            'CounterName' => $initial,
+            'CounterValue' => 1,
+            'CounterStart' => 1,
+            'CounterEnd' => 10,
+            'CounterReset' => 1,
+        ]);
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "api/counter/{$id}", ['CounterName' => 'Updated counter']);
+
+        $patch->assertStatus(201);
+        $show = $this->withHeaders($this->authHeaders())->call('get', "api/counter/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated counter', $showData['CounterName']);
+        $this->assertEquals(1, (int) $showData['CounterValue']);
+    }
+
+    public function testPartialUpdateOrganizationAccount()
+    {
+        $name = 'Account ' . uniqid();
+        $id = $this->createResource('api/organization/account', ['AccountName' => $name]);
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "api/organization/account/{$id}", ['AccountName' => 'Updated account']);
+
+        $patch->assertStatus(201);
+        $show = $this->withHeaders($this->authHeaders())->call('get', "api/organization/account/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated account', $showData['AccountName']);
+    }
+
+    public function testPartialUpdateDiscipline()
+    {
+        $code = 'DIS_' . strtoupper(bin2hex(random_bytes(2)));
+        $name = 'Discipline ' . uniqid();
+        $id = $this->createResource('api/organization/discipline', [
+            'DisciplineCode' => $code,
+            'DisciplineName' => $name,
+        ]);
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "api/organization/discipline/{$id}", ['DisciplineName' => 'Discipline Updated']);
+
+        $patch->assertStatus(201);
+        $show = $this->withHeaders($this->authHeaders())->call('get', "api/organization/discipline/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Discipline Updated', $showData['DisciplineName']);
+        $this->assertEquals($code, $showData['DisciplineCode']);
+    }
+
+    public function testPartialUpdateCodingSystem()
+    {
+        $abbr = 'CS' . strtoupper(bin2hex(random_bytes(2)));
+        $full = 'Full text ' . uniqid();
+        $id = $this->createResource('api/organization/codingsys', [
+            'CodingSysAbb' => $abbr,
+            'FullText' => $full,
+        ]);
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "api/organization/codingsys/{$id}", ['FullText' => 'Updated full text']);
+
+        $patch->assertStatus(201);
+        $show = $this->withHeaders($this->authHeaders())->call('get', "api/organization/codingsys/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated full text', $showData['FullText']);
+        $this->assertEquals($abbr, $showData['CodingSysAbb']);
+    }
+
+    public function testPartialUpdateSpecimenContainer()
+    {
+        $record = $this->fetchFirstRecord('api/specimen/container', 'ConDefID');
+        $id = $record['ConDefID'];
+        $newName = 'Patch Container ' . uniqid();
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "api/specimen/container/{$id}", ['ConName' => $newName]);
+
+        $patch->assertStatus(201);
+        $showData = $this->fetchResource('api/specimen/container', $id);
+
+        $this->assertEquals($newName, $showData['ConName']);
+        $this->assertEquals($record['ConCode'] ?? null, $showData['ConCode'] ?? null);
+    }
+
+    public function testPartialUpdateSpecimenPrep()
+    {
+        $record = $this->fetchFirstRecord('api/specimen/prep', 'SpcPrpID');
+        $id = $record['SpcPrpID'];
+        $newDesc = 'Partial Prep ' . uniqid();
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "api/specimen/prep/{$id}", ['Description' => $newDesc]);
+
+        $patch->assertStatus(201);
+        $showData = $this->fetchResource('api/specimen/prep', $id);
+
+        $this->assertEquals($newDesc, $showData['Description']);
+        $this->assertEquals($record['SpcStaID'] ?? null, $showData['SpcStaID'] ?? null);
+    }
+
+    public function testPartialUpdateSpecimenStatus()
+    {
+        $record = $this->fetchFirstRecord('api/specimen/status', 'SpcStaID');
+        $id = $record['SpcStaID'];
+        $newStatus = 'UpdatedStatus';
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "api/specimen/status/{$id}", ['SpcStatus' => $newStatus]);
+
+        $patch->assertStatus(201);
+        $showData = $this->fetchResource('api/specimen/status', $id);
+
+        $this->assertEquals($newStatus, $showData['SpcStatus']);
+        $this->assertEquals($record['OrderID'] ?? null, $showData['OrderID'] ?? null);
+    }
+
+    public function testPartialUpdateSpecimenCollection()
+    {
+        $record = $this->fetchFirstRecord('api/specimen/collection', 'SpcColID');
+        $id = $record['SpcColID'];
+        $newBodySite = 'BodySite ' . uniqid();
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "api/specimen/collection/{$id}", ['BodySite' => $newBodySite]);
+
+        $patch->assertStatus(201);
+        $showData = $this->fetchResource('api/specimen/collection', $id);
+
+        $this->assertEquals($newBodySite, $showData['BodySite']);
+        $this->assertEquals($record['SpRole'] ?? null, $showData['SpRole'] ?? null);
+    }
+
+    public function testPartialUpdateEquipmentList()
+    {
+        $record = $this->fetchFirstRecord('api/equipmentlist', 'EID');
+        $id = $record['EID'];
+        $newName = 'Equipment ' . uniqid();
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "api/equipmentlist/{$id}", ['InstrumentName' => $newName]);
+
+        $patch->assertStatus(200, 'Equipment patch should return 200');
+        $showData = $this->fetchResource('api/equipmentlist', $id);
+
+        $this->assertEquals($newName, $showData['InstrumentName']);
+        $this->assertEquals($record['DepartmentID'] ?? null, $showData['DepartmentID'] ?? null);
+    }
+}
diff --git a/tests/feature/OrderTest/OrderTestPatchTest.php b/tests/feature/OrderTest/OrderTestPatchTest.php
new file mode 100644
index 0000000..e87076f
--- /dev/null
+++ b/tests/feature/OrderTest/OrderTestPatchTest.php
@@ -0,0 +1,121 @@
+<?php
+
+namespace Tests\Feature\OrderTest;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class OrderTestPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/ordertest';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createOrderTest(array $data = []): array
+    {
+        $payload = array_merge([
+            'OrderCode' => 'ORD_' . uniqid(),
+            'OrderName' => 'Test Order ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateOrderTestSuccess()
+    {
+        $order = $this->createOrderTest();
+        $id = $order['OrderID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['OrderName' => 'Updated Order']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Order', $showData['OrderName']);
+        $this->assertEquals($order['OrderCode'], $showData['OrderCode']);
+    }
+
+    public function testPartialUpdateOrderTestNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['OrderName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateOrderTestInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['OrderName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateOrderTestEmptyPayload()
+    {
+        $order = $this->createOrderTest();
+        $id = $order['OrderID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateOrderTestSingleField()
+    {
+        $order = $this->createOrderTest();
+        $id = $order['OrderID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['OrderCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($order['OrderCode'], $showData['OrderCode']);
+        $this->assertEquals($order['OrderName'], $showData['OrderName']);
+    }
+}
diff --git a/tests/feature/Organization/DepartmentPatchTest.php b/tests/feature/Organization/DepartmentPatchTest.php
new file mode 100644
index 0000000..9f792ba
--- /dev/null
+++ b/tests/feature/Organization/DepartmentPatchTest.php
@@ -0,0 +1,123 @@
+<?php
+
+namespace Tests\Feature\Organization;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class DepartmentPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/organization/department';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createDepartment(array $data = []): array
+    {
+        $payload = array_merge([
+            'DepartmentCode' => 'DEPT_' . uniqid(),
+            'DepartmentName' => 'Test Department ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        if ($response->getStatusCode() !== 201) {
+            $this->markTestSkipped('Failed to create test department');
+        }
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'] ?? [];
+    }
+
+    public function testPartialUpdateDepartmentSuccess()
+    {
+        $dept = $this->createDepartment();
+        $id = $dept['DepartmentID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['DepartmentName' => 'Updated Department']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Department', $showData['DepartmentName']);
+        $this->assertEquals($dept['DepartmentCode'], $showData['DepartmentCode']);
+    }
+
+    public function testPartialUpdateDepartmentNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['DepartmentName' => 'Updated']);
+
+        $this->assertTrue(in_array($patch->getStatusCode(), [404, 400, 201]));
+    }
+
+    public function testPartialUpdateDepartmentZeroId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/0", ['DepartmentName' => 'Updated']);
+
+        $this->assertTrue(in_array($patch->getStatusCode(), [404, 400, 201]));
+    }
+
+    public function testPartialUpdateDepartmentEmptyPayload()
+    {
+        $dept = $this->createDepartment();
+        $id = $dept['DepartmentID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateDepartmentSingleField()
+    {
+        $dept = $this->createDepartment();
+        $id = $dept['DepartmentID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['DepartmentCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($dept['DepartmentCode'], $showData['DepartmentCode']);
+        $this->assertEquals($dept['DepartmentName'], $showData['DepartmentName']);
+    }
+}
diff --git a/tests/feature/Organization/HostAppPatchTest.php b/tests/feature/Organization/HostAppPatchTest.php
new file mode 100644
index 0000000..81106e8
--- /dev/null
+++ b/tests/feature/Organization/HostAppPatchTest.php
@@ -0,0 +1,122 @@
+<?php
+
+namespace Tests\Feature\Organization;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class HostAppPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/organization/hostapp';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createHostApp(array $data = []): array
+    {
+        $payload = array_merge([
+            'HostAppCode' => 'HA_' . uniqid(),
+            'HostAppName' => 'Test HostApp ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        $id = $decoded['data'];
+        return array_merge(['HostAppID' => $id], $payload);
+    }
+
+    public function testPartialUpdateHostAppSuccess()
+    {
+        $app = $this->createHostApp();
+        $id = $app['HostAppID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['HostAppName' => 'Updated HostApp']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated HostApp', $showData['HostAppName']);
+        $this->assertEquals($app['HostAppCode'], $showData['HostAppCode']);
+    }
+
+    public function testPartialUpdateHostAppNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['HostAppName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateHostAppInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['HostAppName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateHostAppEmptyPayload()
+    {
+        $app = $this->createHostApp();
+        $id = $app['HostAppID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateHostAppSingleField()
+    {
+        $app = $this->createHostApp();
+        $id = $app['HostAppID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['HostAppCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($app['HostAppCode'], $showData['HostAppCode']);
+        $this->assertEquals($app['HostAppName'], $showData['HostAppName']);
+    }
+}
diff --git a/tests/feature/Organization/HostComParaPatchTest.php b/tests/feature/Organization/HostComParaPatchTest.php
new file mode 100644
index 0000000..c46b2f7
--- /dev/null
+++ b/tests/feature/Organization/HostComParaPatchTest.php
@@ -0,0 +1,121 @@
+<?php
+
+namespace Tests\Feature\Organization;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class HostComParaPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/organization/hostcompara';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createHostComPara(array $data = []): array
+    {
+        $payload = array_merge([
+            'HostComParaCode' => 'HCP_' . uniqid(),
+            'HostComParaName' => 'Test HostComPara ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateHostComParaSuccess()
+    {
+        $para = $this->createHostComPara();
+        $id = $para['HostComParaID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['HostComParaName' => 'Updated HostComPara']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated HostComPara', $showData['HostComParaName']);
+        $this->assertEquals($para['HostComParaCode'], $showData['HostComParaCode']);
+    }
+
+    public function testPartialUpdateHostComParaNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['HostComParaName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateHostComParaInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['HostComParaName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateHostComParaEmptyPayload()
+    {
+        $para = $this->createHostComPara();
+        $id = $para['HostComParaID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateHostComParaSingleField()
+    {
+        $para = $this->createHostComPara();
+        $id = $para['HostComParaID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['HostComParaCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($para['HostComParaCode'], $showData['HostComParaCode']);
+        $this->assertEquals($para['HostComParaName'], $showData['HostComParaName']);
+    }
+}
diff --git a/tests/feature/Organization/SitePatchTest.php b/tests/feature/Organization/SitePatchTest.php
new file mode 100644
index 0000000..e9fe5e8
--- /dev/null
+++ b/tests/feature/Organization/SitePatchTest.php
@@ -0,0 +1,121 @@
+<?php
+
+namespace Tests\Feature\Organization;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class SitePatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/organization/site';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createSite(array $data = []): array
+    {
+        $payload = array_merge([
+            'SiteCode' => 'SITE_' . uniqid(),
+            'SiteName' => 'Test Site ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateSiteSuccess()
+    {
+        $site = $this->createSite();
+        $id = $site['SiteID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['SiteName' => 'Updated Site']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Site', $showData['SiteName']);
+        $this->assertEquals($site['SiteCode'], $showData['SiteCode']);
+    }
+
+    public function testPartialUpdateSiteNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['SiteName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateSiteInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['SiteName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateSiteEmptyPayload()
+    {
+        $site = $this->createSite();
+        $id = $site['SiteID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateSiteSingleField()
+    {
+        $site = $this->createSite();
+        $id = $site['SiteID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['SiteCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($site['SiteCode'], $showData['SiteCode']);
+        $this->assertEquals($site['SiteName'], $showData['SiteName']);
+    }
+}
diff --git a/tests/feature/Organization/WorkstationPatchTest.php b/tests/feature/Organization/WorkstationPatchTest.php
new file mode 100644
index 0000000..81ba6dc
--- /dev/null
+++ b/tests/feature/Organization/WorkstationPatchTest.php
@@ -0,0 +1,122 @@
+<?php
+
+namespace Tests\Feature\Organization;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class WorkstationPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/organization/workstation';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createWorkstation(array $data = []): array
+    {
+        $payload = array_merge([
+            'WorkstationCode' => 'WS_' . uniqid(),
+            'WorkstationName' => 'Test Workstation ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        $id = $decoded['data'];
+        return array_merge(['WorkstationID' => $id], $payload);
+    }
+
+    public function testPartialUpdateWorkstationSuccess()
+    {
+        $ws = $this->createWorkstation();
+        $id = $ws['WorkstationID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['WorkstationName' => 'Updated Workstation']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Workstation', $showData['WorkstationName']);
+        $this->assertEquals($ws['WorkstationCode'], $showData['WorkstationCode']);
+    }
+
+    public function testPartialUpdateWorkstationNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['WorkstationName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateWorkstationInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['WorkstationName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateWorkstationEmptyPayload()
+    {
+        $ws = $this->createWorkstation();
+        $id = $ws['WorkstationID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateWorkstationSingleField()
+    {
+        $ws = $this->createWorkstation();
+        $id = $ws['WorkstationID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['WorkstationCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($ws['WorkstationCode'], $showData['WorkstationCode']);
+        $this->assertEquals($ws['WorkstationName'], $showData['WorkstationName']);
+    }
+}
diff --git a/tests/feature/OrganizationControllerTest.php b/tests/feature/OrganizationControllerTest.php
index 78ff00e..269dc15 100644
--- a/tests/feature/OrganizationControllerTest.php
+++ b/tests/feature/OrganizationControllerTest.php
@@ -6,12 +6,12 @@ use CodeIgniter\Test\FeatureTestTrait;
 use CodeIgniter\Test\CIUnitTestCase;
 use Firebase\JWT\JWT;
 
-class OrganizationControllerTest extends CIUnitTestCase
-{
-    use FeatureTestTrait;
-
-    protected $token;
-
+class OrganizationControllerTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected $token;
+
     protected function setUp(): void
     {
         parent::setUp();
@@ -30,11 +30,30 @@ class OrganizationControllerTest extends CIUnitTestCase
         $this->token = JWT::encode($payload, $key, 'HS256');
     }
 
-    protected function callProtected($method, $path, $params = [])
-    {
-        return $this->withHeaders(['Cookie' => 'token=' . $this->token])
-                    ->call($method, $path, $params);
-    }
+    protected function callProtected($method, $path, $params = [])
+    {
+        return $this->withHeaders(['Cookie' => 'token=' . $this->token])
+                    ->call($method, $path, $params);
+    }
+
+    private function createSite(array $overrides = []): array
+    {
+        $payload = array_merge([
+            'SiteCode' => strtoupper(bin2hex(random_bytes(1))),
+            'SiteName' => 'Partial Site ' . time(),
+        ], $overrides);
+
+        $result = $this->withHeaders(['Cookie' => 'token=' . $this->token])
+                       ->withBody(json_encode($payload))
+                       ->call('post', 'api/organization/site');
+        $result->assertStatus(201);
+
+        $decoded = json_decode($result->getJSON(), true);
+        return [
+            'id' => $decoded['data'],
+            'code' => $payload['SiteCode'],
+        ];
+    }
 
     public function testSiteIndexReturnsSuccess()
     {
@@ -63,12 +82,12 @@ class OrganizationControllerTest extends CIUnitTestCase
         $this->assertEquals('success', $data['status']);
     }
 
-    public function testCreateSite()
-    {
-        $siteData = [
-            'SiteCode' => 'S' . substr(time(), -5),
-            'SiteName' => 'Test Site ' . time()
-        ];
+    public function testCreateSite()
+    {
+        $siteData = [
+            'SiteCode' => 'S' . substr(time(), -5),
+            'SiteName' => 'Test Site ' . time()
+        ];
 
         $result = $this->withHeaders(['Cookie' => 'token=' . $this->token])
                        ->withBody(json_encode($siteData))
@@ -118,5 +137,25 @@ class OrganizationControllerTest extends CIUnitTestCase
 
         $this->assertEquals('success', $data['status']);
         $this->assertIsInt($data['data']);
-    }
-}
+    }
+
+    public function testPartialUpdateSiteKeepsOtherFields()
+    {
+        $site = $this->createSite(['SiteName' => 'Original Site']);
+        $siteId = $site['id'];
+        $siteCode = $site['code'];
+
+        $updateResponse = $this->withHeaders(['Cookie' => 'token=' . $this->token])
+                               ->withBodyFormat('json')
+                               ->call('patch', 'api/organization/site/' . $siteId, ['SiteName' => 'Patched Site']);
+
+        $updateResponse->assertStatus(201);
+        $decoded = json_decode($updateResponse->getJSON(), true);
+        $this->assertEquals('success', $decoded['status']);
+
+        $show = $this->callProtected('get', 'api/organization/site/' . $siteId);
+        $showData = json_decode($show->getJSON(), true)['data'];
+        $this->assertEquals('Patched Site', $showData['SiteName']);
+        $this->assertEquals($siteCode, $showData['SiteCode']);
+    }
+}
diff --git a/tests/feature/PatVisit/PatVisitADTPatchTest.php b/tests/feature/PatVisit/PatVisitADTPatchTest.php
new file mode 100644
index 0000000..69e3296
--- /dev/null
+++ b/tests/feature/PatVisit/PatVisitADTPatchTest.php
@@ -0,0 +1,97 @@
+<?php
+
+namespace Tests\Feature\PatVisit;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Tests\Support\Traits\CreatesPatients;
+
+class PatVisitADTPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+    use CreatesPatients;
+
+    protected string $endpoint = 'api/patvisitadt';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+    }
+
+    private function createPatVisitADT(array $data = []): array
+    {
+        $payload = array_merge([
+            'InternalPID' => $this->createTestPatient(),
+            'ADTCode' => 'A01',
+            'LocationID' => '1',
+        ], $data);
+
+        $response = $this->withBodyFormat('json')->call('post', $this->endpoint, $payload);
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdatePatVisitADTSuccess()
+    {
+        $adt = $this->createPatVisitADT();
+        $id = $adt['ADTID'];
+
+        $patch = $this->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['ADTCode' => 'A02']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('A02', $showData['ADTCode']);
+        $this->assertEquals($adt['LocationID'], $showData['LocationID']);
+    }
+
+    public function testPartialUpdatePatVisitADTNotFound()
+    {
+        $patch = $this->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['ADTCode' => 'A02']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdatePatVisitADTInvalidId()
+    {
+        $patch = $this->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['ADTCode' => 'A02']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdatePatVisitADTEmptyPayload()
+    {
+        $adt = $this->createPatVisitADT();
+        $id = $adt['ADTID'];
+
+        $patch = $this->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdatePatVisitADTSingleField()
+    {
+        $adt = $this->createPatVisitADT();
+        $id = $adt['ADTID'];
+
+        $patch = $this->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['ADTCode' => 'A03']);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertEquals('A03', $showData['ADTCode']);
+        $this->assertEquals($adt['LocationID'], $showData['LocationID']);
+    }
+}
diff --git a/tests/feature/Result/ResultPatchTest.php b/tests/feature/Result/ResultPatchTest.php
new file mode 100644
index 0000000..577fda6
--- /dev/null
+++ b/tests/feature/Result/ResultPatchTest.php
@@ -0,0 +1,121 @@
+<?php
+
+namespace Tests\Feature\Result;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class ResultPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/result';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createResult(array $data = []): array
+    {
+        $payload = array_merge([
+            'ResultCode' => 'RES_' . uniqid(),
+            'ResultValue' => 'Test Value ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateResultSuccess()
+    {
+        $result = $this->createResult();
+        $id = $result['ResultID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['ResultValue' => 'Updated Value']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Value', $showData['ResultValue']);
+        $this->assertEquals($result['ResultCode'], $showData['ResultCode']);
+    }
+
+    public function testPartialUpdateResultNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['ResultValue' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateResultInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['ResultValue' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateResultEmptyPayload()
+    {
+        $result = $this->createResult();
+        $id = $result['ResultID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateResultSingleField()
+    {
+        $result = $this->createResult();
+        $id = $result['ResultID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['ResultCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($result['ResultCode'], $showData['ResultCode']);
+        $this->assertEquals($result['ResultValue'], $showData['ResultValue']);
+    }
+}
diff --git a/tests/feature/Rule/RulePatchTest.php b/tests/feature/Rule/RulePatchTest.php
new file mode 100644
index 0000000..7a581e7
--- /dev/null
+++ b/tests/feature/Rule/RulePatchTest.php
@@ -0,0 +1,122 @@
+<?php
+
+namespace Tests\Feature\Rule;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class RulePatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/rule';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createRule(array $data = []): array
+    {
+        $payload = array_merge([
+            'RuleCode' => 'RULE_' . uniqid(),
+            'RuleName' => 'Test Rule ' . uniqid(),
+            'RuleExpression' => 'test_expression',
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateRuleSuccess()
+    {
+        $rule = $this->createRule();
+        $id = $rule['RuleID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['RuleName' => 'Updated Rule']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Rule', $showData['RuleName']);
+        $this->assertEquals($rule['RuleCode'], $showData['RuleCode']);
+    }
+
+    public function testPartialUpdateRuleNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['RuleName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateRuleInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['RuleName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateRuleEmptyPayload()
+    {
+        $rule = $this->createRule();
+        $id = $rule['RuleID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateRuleSingleField()
+    {
+        $rule = $this->createRule();
+        $id = $rule['RuleID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['RuleCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($rule['RuleCode'], $showData['RuleCode']);
+        $this->assertEquals($rule['RuleName'], $showData['RuleName']);
+    }
+}
diff --git a/tests/feature/Specimen/CollectionPatchTest.php b/tests/feature/Specimen/CollectionPatchTest.php
new file mode 100644
index 0000000..414d250
--- /dev/null
+++ b/tests/feature/Specimen/CollectionPatchTest.php
@@ -0,0 +1,118 @@
+<?php
+
+namespace Tests\Feature\Specimen;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class CollectionPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/specimen/collection';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createCollection(array $data = []): array
+    {
+        $payload = array_merge([
+            'BodySite' => 'BodySite_' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateCollectionSuccess()
+    {
+        $collection = $this->createCollection();
+        $id = $collection['SpcColID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['BodySite' => 'UpdatedBodySite']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('UpdatedBodySite', $showData['BodySite']);
+    }
+
+    public function testPartialUpdateCollectionNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['BodySite' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateCollectionInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['BodySite' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateCollectionEmptyPayload()
+    {
+        $collection = $this->createCollection();
+        $id = $collection['SpcColID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateCollectionSingleField()
+    {
+        $collection = $this->createCollection();
+        $id = $collection['SpcColID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['BodySite' => 'NewBodySite']);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertEquals('NewBodySite', $showData['BodySite']);
+    }
+}
diff --git a/tests/feature/Specimen/ContainerPatchTest.php b/tests/feature/Specimen/ContainerPatchTest.php
new file mode 100644
index 0000000..2a8b65c
--- /dev/null
+++ b/tests/feature/Specimen/ContainerPatchTest.php
@@ -0,0 +1,122 @@
+<?php
+
+namespace Tests\Feature\Specimen;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class ContainerPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/specimen/container';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createContainer(array $data = []): array
+    {
+        $payload = array_merge([
+            'ConCode' => 'CON_' . uniqid(),
+            'ConName' => 'Test Container ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        $id = $decoded['data'];
+        return array_merge(['ConDefID' => $id], $payload);
+    }
+
+    public function testPartialUpdateContainerSuccess()
+    {
+        $container = $this->createContainer();
+        $id = $container['ConDefID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['ConName' => 'Updated Container']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Container', $showData['ConName']);
+        $this->assertEquals($container['ConCode'], $showData['ConCode']);
+    }
+
+    public function testPartialUpdateContainerNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['ConName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateContainerInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['ConName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateContainerEmptyPayload()
+    {
+        $container = $this->createContainer();
+        $id = $container['ConDefID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateContainerSingleField()
+    {
+        $container = $this->createContainer();
+        $id = $container['ConDefID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['ConCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($container['ConCode'], $showData['ConCode']);
+        $this->assertEquals($container['ConName'], $showData['ConName']);
+    }
+}
diff --git a/tests/feature/Specimen/PrepPatchTest.php b/tests/feature/Specimen/PrepPatchTest.php
new file mode 100644
index 0000000..3b32cdf
--- /dev/null
+++ b/tests/feature/Specimen/PrepPatchTest.php
@@ -0,0 +1,121 @@
+<?php
+
+namespace Tests\Feature\Specimen;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class PrepPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/specimen/prep';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createPrep(array $data = []): array
+    {
+        $payload = array_merge([
+            'SpcPrpCode' => 'PREP_' . uniqid(),
+            'Description' => 'Test Prep ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdatePrepSuccess()
+    {
+        $prep = $this->createPrep();
+        $id = $prep['SpcPrpID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['Description' => 'Updated Prep']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Prep', $showData['Description']);
+        $this->assertEquals($prep['SpcPrpCode'], $showData['SpcPrpCode']);
+    }
+
+    public function testPartialUpdatePrepNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['Description' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdatePrepInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['Description' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdatePrepEmptyPayload()
+    {
+        $prep = $this->createPrep();
+        $id = $prep['SpcPrpID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdatePrepSingleField()
+    {
+        $prep = $this->createPrep();
+        $id = $prep['SpcPrpID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['SpcPrpCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($prep['SpcPrpCode'], $showData['SpcPrpCode']);
+        $this->assertEquals($prep['Description'], $showData['Description']);
+    }
+}
diff --git a/tests/feature/Specimen/SpecimenPatchTest.php b/tests/feature/Specimen/SpecimenPatchTest.php
new file mode 100644
index 0000000..bcf12da
--- /dev/null
+++ b/tests/feature/Specimen/SpecimenPatchTest.php
@@ -0,0 +1,121 @@
+<?php
+
+namespace Tests\Feature\Specimen;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class SpecimenPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/specimen';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createSpecimen(array $data = []): array
+    {
+        $payload = array_merge([
+            'SpecimenCode' => 'SPEC_' . uniqid(),
+            'SpecimenName' => 'Test Specimen ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateSpecimenSuccess()
+    {
+        $specimen = $this->createSpecimen();
+        $id = $specimen['SpecimenID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['SpecimenName' => 'Updated Specimen']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Specimen', $showData['SpecimenName']);
+        $this->assertEquals($specimen['SpecimenCode'], $showData['SpecimenCode']);
+    }
+
+    public function testPartialUpdateSpecimenNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['SpecimenName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateSpecimenInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['SpecimenName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateSpecimenEmptyPayload()
+    {
+        $specimen = $this->createSpecimen();
+        $id = $specimen['SpecimenID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateSpecimenSingleField()
+    {
+        $specimen = $this->createSpecimen();
+        $id = $specimen['SpecimenID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['SpecimenCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($specimen['SpecimenCode'], $showData['SpecimenCode']);
+        $this->assertEquals($specimen['SpecimenName'], $showData['SpecimenName']);
+    }
+}
diff --git a/tests/feature/Specimen/StatusPatchTest.php b/tests/feature/Specimen/StatusPatchTest.php
new file mode 100644
index 0000000..e8bfe4b
--- /dev/null
+++ b/tests/feature/Specimen/StatusPatchTest.php
@@ -0,0 +1,118 @@
+<?php
+
+namespace Tests\Feature\Specimen;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class StatusPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/specimen/status';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createStatus(array $data = []): array
+    {
+        $payload = array_merge([
+            'SpcStatus' => 'Status_' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateStatusSuccess()
+    {
+        $status = $this->createStatus();
+        $id = $status['SpcStaID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['SpcStatus' => 'UpdatedStatus']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('UpdatedStatus', $showData['SpcStatus']);
+    }
+
+    public function testPartialUpdateStatusNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['SpcStatus' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateStatusInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['SpcStatus' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateStatusEmptyPayload()
+    {
+        $status = $this->createStatus();
+        $id = $status['SpcStaID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateStatusSingleField()
+    {
+        $status = $this->createStatus();
+        $id = $status['SpcStaID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['SpcStatus' => 'NewStatus']);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertEquals('NewStatus', $showData['SpcStatus']);
+    }
+}
diff --git a/tests/feature/Test/TestMapDetailPatchTest.php b/tests/feature/Test/TestMapDetailPatchTest.php
new file mode 100644
index 0000000..41c1628
--- /dev/null
+++ b/tests/feature/Test/TestMapDetailPatchTest.php
@@ -0,0 +1,121 @@
+<?php
+
+namespace Tests\Feature\Test;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class TestMapDetailPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/test/testmap/detail';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createTestMapDetail(array $data = []): array
+    {
+        $payload = array_merge([
+            'TestMapDetailCode' => 'TMD_' . uniqid(),
+            'TestMapDetailName' => 'Test Map Detail ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateTestMapDetailSuccess()
+    {
+        $detail = $this->createTestMapDetail();
+        $id = $detail['TestMapDetailID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['TestMapDetailName' => 'Updated Detail']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Detail', $showData['TestMapDetailName']);
+        $this->assertEquals($detail['TestMapDetailCode'], $showData['TestMapDetailCode']);
+    }
+
+    public function testPartialUpdateTestMapDetailNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['TestMapDetailName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateTestMapDetailInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['TestMapDetailName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateTestMapDetailEmptyPayload()
+    {
+        $detail = $this->createTestMapDetail();
+        $id = $detail['TestMapDetailID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateTestMapDetailSingleField()
+    {
+        $detail = $this->createTestMapDetail();
+        $id = $detail['TestMapDetailID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['TestMapDetailCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($detail['TestMapDetailCode'], $showData['TestMapDetailCode']);
+        $this->assertEquals($detail['TestMapDetailName'], $showData['TestMapDetailName']);
+    }
+}
diff --git a/tests/feature/Test/TestMapPatchTest.php b/tests/feature/Test/TestMapPatchTest.php
new file mode 100644
index 0000000..373ea1f
--- /dev/null
+++ b/tests/feature/Test/TestMapPatchTest.php
@@ -0,0 +1,121 @@
+<?php
+
+namespace Tests\Feature\Test;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class TestMapPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/test/testmap';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createTestMap(array $data = []): array
+    {
+        $payload = array_merge([
+            'TestMapCode' => 'TM_' . uniqid(),
+            'TestMapName' => 'Test Map ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateTestMapSuccess()
+    {
+        $testMap = $this->createTestMap();
+        $id = $testMap['TestMapID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['TestMapName' => 'Updated TestMap']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated TestMap', $showData['TestMapName']);
+        $this->assertEquals($testMap['TestMapCode'], $showData['TestMapCode']);
+    }
+
+    public function testPartialUpdateTestMapNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['TestMapName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateTestMapInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['TestMapName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateTestMapEmptyPayload()
+    {
+        $testMap = $this->createTestMap();
+        $id = $testMap['TestMapID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateTestMapSingleField()
+    {
+        $testMap = $this->createTestMap();
+        $id = $testMap['TestMapID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['TestMapCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($testMap['TestMapCode'], $showData['TestMapCode']);
+        $this->assertEquals($testMap['TestMapName'], $showData['TestMapName']);
+    }
+}
diff --git a/tests/feature/Test/TestsPatchTest.php b/tests/feature/Test/TestsPatchTest.php
new file mode 100644
index 0000000..57221a3
--- /dev/null
+++ b/tests/feature/Test/TestsPatchTest.php
@@ -0,0 +1,121 @@
+<?php
+
+namespace Tests\Feature\Test;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class TestsPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/test';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createTest(array $data = []): array
+    {
+        $payload = array_merge([
+            'TestCode' => 'TEST_' . uniqid(),
+            'TestName' => 'Test Name ' . uniqid(),
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateTestSuccess()
+    {
+        $test = $this->createTest();
+        $id = $test['TestID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['TestName' => 'Updated Test']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated Test', $showData['TestName']);
+        $this->assertEquals($test['TestCode'], $showData['TestCode']);
+    }
+
+    public function testPartialUpdateTestNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['TestName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateTestInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['TestName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateTestEmptyPayload()
+    {
+        $test = $this->createTest();
+        $id = $test['TestID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateTestSingleField()
+    {
+        $test = $this->createTest();
+        $id = $test['TestID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['TestCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($test['TestCode'], $showData['TestCode']);
+        $this->assertEquals($test['TestName'], $showData['TestName']);
+    }
+}
diff --git a/tests/feature/User/UserPatchTest.php b/tests/feature/User/UserPatchTest.php
new file mode 100644
index 0000000..ff37fac
--- /dev/null
+++ b/tests/feature/User/UserPatchTest.php
@@ -0,0 +1,122 @@
+<?php
+
+namespace Tests\Feature\User;
+
+use CodeIgniter\Test\FeatureTestTrait;
+use CodeIgniter\Test\CIUnitTestCase;
+use Firebase\JWT\JWT;
+
+class UserPatchTest extends CIUnitTestCase
+{
+    use FeatureTestTrait;
+
+    protected string $token;
+    protected string $endpoint = 'api/user';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $key = getenv('JWT_SECRET') ?: 'my-secret-key';
+        $payload = [
+            'iss' => 'localhost',
+            'aud' => 'localhost',
+            'iat' => time(),
+            'nbf' => time(),
+            'exp' => time() + 3600,
+            'uid' => 1,
+            'email' => 'admin@admin.com',
+        ];
+        $this->token = JWT::encode($payload, $key, 'HS256');
+    }
+
+    private function authHeaders(): array
+    {
+        return ['Cookie' => 'token=' . $this->token];
+    }
+
+    private function createUser(array $data = []): array
+    {
+        $payload = array_merge([
+            'UserCode' => 'USR_' . uniqid(),
+            'UserName' => 'Test User ' . uniqid(),
+            'Email' => 'user_' . uniqid() . '@test.com',
+        ], $data);
+
+        $response = $this->withHeaders($this->authHeaders())
+                         ->withBodyFormat('json')
+                         ->call('post', $this->endpoint, $payload);
+
+        $response->assertStatus(201);
+        $decoded = json_decode($response->getJSON(), true);
+        return $decoded['data'];
+    }
+
+    public function testPartialUpdateUserSuccess()
+    {
+        $user = $this->createUser();
+        $id = $user['UserID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['UserName' => 'Updated User']);
+
+        $patch->assertStatus(200);
+        $patchData = json_decode($patch->getJSON(), true);
+        $this->assertEquals('success', $patchData['status']);
+
+        $show = $this->withHeaders($this->authHeaders())->call('get', "{$this->endpoint}/{$id}");
+        $show->assertStatus(200);
+        $showData = json_decode($show->getJSON(), true)['data'];
+
+        $this->assertEquals('Updated User', $showData['UserName']);
+        $this->assertEquals($user['UserCode'], $showData['UserCode']);
+    }
+
+    public function testPartialUpdateUserNotFound()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/999999", ['UserName' => 'Updated']);
+
+        $patch->assertStatus(404);
+    }
+
+    public function testPartialUpdateUserInvalidId()
+    {
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/invalid", ['UserName' => 'Updated']);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateUserEmptyPayload()
+    {
+        $user = $this->createUser();
+        $id = $user['UserID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", []);
+
+        $patch->assertStatus(400);
+    }
+
+    public function testPartialUpdateUserSingleField()
+    {
+        $user = $this->createUser();
+        $id = $user['UserID'];
+
+        $patch = $this->withHeaders($this->authHeaders())
+                      ->withBodyFormat('json')
+                      ->call('patch', "{$this->endpoint}/{$id}", ['UserCode' => 'NEW_' . uniqid()]);
+
+        $patch->assertStatus(200);
+        $showData = json_decode($this->withHeaders($this->authHeaders())
+                                     ->call('get', "{$this->endpoint}/{$id}")
+                                     ->getJSON(), true)['data'];
+
+        $this->assertNotEquals($user['UserCode'], $showData['UserCode']);
+        $this->assertEquals($user['UserName'], $showData['UserName']);
+    }
+}