feat: add client method to BaseIntegrationService for pre-configured HTTP client and implement test for client functionality

tests/Feature/Integration/IntegrationServiceTest.php

@@ -247,4 +247,56 @@ class IntegrationServiceTest extends TestCase
 
         $service->getToken();
     }
+
+    public function test_it_returns_preconfigured_client(): void
+    {
+        Integration::create([
+            'integration_code' => 'telepagos_homo',
+            'name' => 'Telepagos',
+            'url' => 'https://api.telepagos.com.ar',
+            'integration_data_schema' => [
+                'username' => 'required|string',
+                'password' => 'required|string',
+            ]
+        ]);
+
+        TenantIntegration::create([
+            'tenant_code' => $this->tenant->codigo,
+            'integration_code' => 'telepagos_homo',
+            'integration_data' => [
+                'username' => 'tele_user',
+                'password' => 'tele_pass',
+            ]
+        ]);
+
+        Http::fake([
+            'https://api.telepagos.com.ar/v2/auth/token' => Http::response([
+                'status' => 'ok',
+                'token' => 'mock-jwt-token-123',
+                'expires_at' => now()->addHour()->toDateTimeString()
+            ], 200),
+            'https://api.telepagos.com.ar/v1/payments' => Http::response([
+                'status' => 'success',
+                'payment_id' => 999
+            ], 200)
+        ]);
+
+        $service = new TelepagosIntegrationService('telepagos');
+        $service->forTenant($this->tenant->codigo);
+
+        // Get configured client and perform GET request
+        $client = $service->client();
+        $this->assertInstanceOf(\Illuminate\Http\Client\PendingRequest::class, $client);
+
+        $response = $client->get('/v1/payments');
+
+        $this->assertTrue($response->successful());
+        $this->assertEquals(999, $response->json('payment_id'));
+
+        // Assert the authorization header was correctly set during request
+        Http::assertSent(function ($request) {
+            return $request->hasHeader('Authorization', 'Bearer mock-jwt-token-123')
+                && $request->url() === 'https://api.telepagos.com.ar/v1/payments';
+        });
+    }
 }