Add test as well

src/tests/Feature/PaymentControllerTest.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace Kalimeromk\HalkbankPayment\tests\Feature;
+
+use Tests\TestCase;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Foundation\Testing\WithFaker;
+
+class PaymentControllerTest extends TestCase
+{
+    use RefreshDatabase, WithFaker;
+
+    /** @test */
+    public function it_shows_the_payment_form()
+    {
+        $response = $this->get('payment/100');
+
+        $response->assertStatus(200);
+        $response->assertViewIs('payment::payment');
+    }
+
+    /** @test */
+    public function it_handles_payment_success()
+    {
+        $mockData = [
+            'ReturnOid' => 'test-order-id12345'
+        ];
+
+        $response = $this->post('/payment/success', $mockData);
+
+        $response->assertStatus(200);
+        $response->assertViewIs('payment::success');
+    }
+
+    /** @test */
+    public function it_handles_payment_failure()
+    {
+        $mockData = [
+            'clientIp' => '127.0.0.1',
+            'mdErrorMsg' => 'Test error message',
+            'ErrMsg' => 'Test error description'
+        ];
+
+        $response = $this->post('/payment/fail', $mockData);
+
+        $response->assertStatus(200);
+        $response->assertViewIs('payment::fail');
+    }
+}