Initial project structure with Slim skeleton

tests/Application/Actions/ActionTest.php

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+<?php
+declare(strict_types=1);
+
+namespace Tests\Application\Actions;
+
+use App\Application\Actions\Action;
+use App\Application\Actions\ActionPayload;
+use DateTimeImmutable;
+use Psr\Http\Message\ResponseInterface as Response;
+use Psr\Log\LoggerInterface;
+use Tests\TestCase;
+
+class ActionTest extends TestCase
+{
+    public function testActionSetsHttpCodeInRespond()
+    {
+        $app = $this->getAppInstance();
+        $container = $app->getContainer();
+        $logger = $container->get(LoggerInterface::class);
+
+        $testAction = new class($logger) extends Action {
+            public function __construct(
+                LoggerInterface $loggerInterface
+            ) {
+                parent::__construct($loggerInterface);
+            }
+
+            public function action(): Response
+            {
+                return $this->respond(
+                    new ActionPayload(
+                        202,
+                        [
+                            'willBeDoneAt' => (new DateTimeImmutable())->format(DateTimeImmutable::ATOM)
+                        ]
+                    )
+                );
+            }
+        };
+
+        $app->get('/test-action-response-code', $testAction);
+        $request = $this->createRequest('GET', '/test-action-response-code');
+        $response = $app->handle($request);
+
+        $this->assertEquals(202, $response->getStatusCode());
+    }
+
+    public function testActionSetsHttpCodeRespondData()
+    {
+        $app = $this->getAppInstance();
+        $container = $app->getContainer();
+        $logger = $container->get(LoggerInterface::class);
+
+        $testAction = new class($logger) extends Action {
+            public function __construct(
+                LoggerInterface $loggerInterface
+            ) {
+                parent::__construct($loggerInterface);
+            }
+
+            public function action(): Response
+            {
+                return $this->respondWithData(
+                    [
+                        'willBeDoneAt' => (new DateTimeImmutable())->format(DateTimeImmutable::ATOM)
+                    ],
+                    202
+                );
+            }
+        };
+
+        $app->get('/test-action-response-code', $testAction);
+        $request = $this->createRequest('GET', '/test-action-response-code');
+        $response = $app->handle($request);
+
+        $this->assertEquals(202, $response->getStatusCode());
+    }
+}

tests/Application/Actions/User/ListUserActionTest.php

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+<?php
+declare(strict_types=1);
+
+namespace Tests\Application\Actions\User;
+
+use App\Application\Actions\ActionPayload;
+use App\Domain\User\UserRepository;
+use App\Domain\User\User;
+use DI\Container;
+use Tests\TestCase;
+
+class ListUserActionTest extends TestCase
+{
+    public function testAction()
+    {
+        $app = $this->getAppInstance();
+
+        /** @var Container $container */
+        $container = $app->getContainer();
+
+        $user = new User(1, 'bill.gates', 'Bill', 'Gates');
+
+        $userRepositoryProphecy = $this->prophesize(UserRepository::class);
+        $userRepositoryProphecy
+            ->findAll()
+            ->willReturn([$user])
+            ->shouldBeCalledOnce();
+
+        $container->set(UserRepository::class, $userRepositoryProphecy->reveal());
+
+        $request = $this->createRequest('GET', '/users');
+        $response = $app->handle($request);
+
+        $payload = (string) $response->getBody();
+        $expectedPayload = new ActionPayload(200, [$user]);
+        $serializedPayload = json_encode($expectedPayload, JSON_PRETTY_PRINT);
+
+        $this->assertEquals($serializedPayload, $payload);
+    }
+}

tests/Application/Actions/User/ViewUserActionTest.php

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+<?php
+declare(strict_types=1);
+
+namespace Tests\Application\Actions\User;
+
+use App\Application\Actions\ActionError;
+use App\Application\Actions\ActionPayload;
+use App\Application\Handlers\HttpErrorHandler;
+use App\Domain\User\User;
+use App\Domain\User\UserNotFoundException;
+use App\Domain\User\UserRepository;
+use DI\Container;
+use Slim\Middleware\ErrorMiddleware;
+use Tests\TestCase;
+
+class ViewUserActionTest extends TestCase
+{
+    public function testAction()
+    {
+        $app = $this->getAppInstance();
+
+        /** @var Container $container */
+        $container = $app->getContainer();
+
+        $user = new User(1, 'bill.gates', 'Bill', 'Gates');
+
+        $userRepositoryProphecy = $this->prophesize(UserRepository::class);
+        $userRepositoryProphecy
+            ->findUserOfId(1)
+            ->willReturn($user)
+            ->shouldBeCalledOnce();
+
+        $container->set(UserRepository::class, $userRepositoryProphecy->reveal());
+
+        $request = $this->createRequest('GET', '/users/1');
+        $response = $app->handle($request);
+
+        $payload = (string) $response->getBody();
+        $expectedPayload = new ActionPayload(200, $user);
+        $serializedPayload = json_encode($expectedPayload, JSON_PRETTY_PRINT);
+
+        $this->assertEquals($serializedPayload, $payload);
+    }
+
+    public function testActionThrowsUserNotFoundException()
+    {
+        $app = $this->getAppInstance();
+
+        $callableResolver = $app->getCallableResolver();
+        $responseFactory = $app->getResponseFactory();
+
+        $errorHandler = new HttpErrorHandler($callableResolver, $responseFactory);
+        $errorMiddleware = new ErrorMiddleware($callableResolver, $responseFactory, true, false, false);
+        $errorMiddleware->setDefaultErrorHandler($errorHandler);
+
+        $app->add($errorMiddleware);
+
+        /** @var Container $container */
+        $container = $app->getContainer();
+
+        $userRepositoryProphecy = $this->prophesize(UserRepository::class);
+        $userRepositoryProphecy
+            ->findUserOfId(1)
+            ->willThrow(new UserNotFoundException())
+            ->shouldBeCalledOnce();
+
+        $container->set(UserRepository::class, $userRepositoryProphecy->reveal());
+
+        $request = $this->createRequest('GET', '/users/1');
+        $response = $app->handle($request);
+
+        $payload = (string) $response->getBody();
+        $expectedError = new ActionError(ActionError::RESOURCE_NOT_FOUND, 'The user you requested does not exist.');
+        $expectedPayload = new ActionPayload(404, null, $expectedError);
+        $serializedPayload = json_encode($expectedPayload, JSON_PRETTY_PRINT);
+
+        $this->assertEquals($serializedPayload, $payload);
+    }
+}