feat: enhance service providers with provides method and integrate command bus in handlers

tests/GrpcHandlers/GreeterHandlerTest.php

@@ -4,19 +4,32 @@ declare(strict_types=1);
 
 namespace Siteworxpro\Tests\GrpcHandlers;
 
+use GRPC\Greeter\HelloRequest;
+use League\Tactician\CommandBus;
+use Siteworxpro\App\GrpcHandlers\GreeterHandler;
 use Siteworxpro\Tests\Unit;
 use Spiral\RoadRunner\GRPC\ContextInterface;
 
 class GreeterHandlerTest extends Unit
 {
+    /**
+     * @throws \ReflectionException
+     */
     public function testSayHello(): void
     {
-        $request = new \GRPC\Greeter\HelloRequest();
+        $this->getContainer()->bind(CommandBus::class, function () {
+            return \Mockery::mock(CommandBus::class)
+                ->shouldReceive('handle')
+                ->andReturn('Hello World')
+                ->getMock();
+        });
+
+        $request = new HelloRequest();
         $request->setName('World');
 
         $context = \Mockery::mock(ContextInterface::class);
 
-        $handler = new \Siteworxpro\App\GrpcHandlers\GreeterHandler();
+        $handler = new GreeterHandler();
         $response = $handler->SayHello($context, $request);
         $this->assertEquals('Hello World', $response->getMessage());
     }