1 files changed, 141 insertions, 0 deletions
diff --git a/tests/Unit/Middleware/CallableHandlerTest.php b/tests/Unit/Middleware/CallableHandlerTest.php
new file mode 100644
index 00000000..29424480
--- /dev/null
+++ b/tests/Unit/Middleware/CallableHandlerTest.php
@@ -0,0 +1,141 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Middleware;
+
+use Engelsystem\Container\Container;
+use Engelsystem\Http\Response;
+use Engelsystem\Middleware\CallableHandler;
+use Engelsystem\Test\Unit\Middleware\Stub\HasStaticMethod;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use ReflectionClass as Reflection;
+use stdClass;
+
+class CallableHandlerTest extends TestCase
+{
+    public function provideCallable()
+    {
+        return [
+            [function () { }],
+            [[$this, 'provideCallable']],
+            [[HasStaticMethod::class, 'foo']],
+        ];
+    }
+
+    /**
+     * @dataProvider provideCallable
+     * @covers       \Engelsystem\Middleware\CallableHandler::__construct
+     * @param callable $callable
+     */
+    public function testInit($callable)
+    {
+        $handler = new CallableHandler($callable);
+
+        $reflection = new Reflection(get_class($handler));
+        $property = $reflection->getProperty('callable');
+        $property->setAccessible(true);
+
+        $this->assertEquals($callable, $property->getValue($handler));
+    }
+
+    /**
+     * @covers \Engelsystem\Middleware\CallableHandler::process
+     */
+    public function testProcess()
+    {
+        /** @var ServerRequestInterface|MockObject $request */
+        /** @var ResponseInterface|MockObject $response */
+        /** @var callable|MockObject $callable */
+        /** @var RequestHandlerInterface|MockObject $handler */
+        list($request, $response, $callable, $handler) = $this->getMocks();
+
+        $callable->expects($this->once())
+            ->method('__invoke')
+            ->with($request, $handler)
+            ->willReturn($response);
+
+        $middleware = new CallableHandler($callable);
+        $middleware->process($request, $handler);
+    }
+
+    /**
+     * @covers \Engelsystem\Middleware\CallableHandler::handle
+     */
+    public function testHandler()
+    {
+        /** @var ServerRequestInterface|MockObject $request */
+        /** @var ResponseInterface|MockObject $response */
+        /** @var callable|MockObject $callable */
+        list($request, $response, $callable) = $this->getMocks();
+
+        $callable->expects($this->once())
+            ->method('__invoke')
+            ->with($request)
+            ->willReturn($response);
+
+        $middleware = new CallableHandler($callable);
+        $middleware->handle($request);
+    }
+
+    /**
+     * @covers \Engelsystem\Middleware\CallableHandler::execute
+     */
+    public function testExecute()
+    {
+        /** @var ServerRequestInterface|MockObject $request */
+        /** @var Response|MockObject $response */
+        /** @var callable|MockObject $callable */
+        list($request, $response, $callable) = $this->getMocks();
+        /** @var Container|MockObject $container */
+        $container = $this->createMock(Container::class);
+
+        $callable->expects($this->exactly(3))
+            ->method('__invoke')
+            ->with($request)
+            ->willReturnOnConsecutiveCalls($response, 'Lorem ipsum?', 'I\'m not an exception!');
+
+        $container->expects($this->once())
+            ->method('get')
+            ->with('response')
+            ->willReturn($response);
+
+        $response->expects($this->once())
+            ->method('withContent')
+            ->with('Lorem ipsum?')
+            ->willReturn($response);
+
+        $middleware = new CallableHandler($callable, $container);
+        $return = $middleware->handle($request);
+        $this->assertInstanceOf(ResponseInterface::class, $return);
+        $this->assertEquals($response, $return);
+
+        $return = $middleware->handle($request);
+        $this->assertInstanceOf(ResponseInterface::class, $return);
+        $this->assertEquals($response, $return);
+
+        $middleware = new CallableHandler($callable);
+        $this->expectException(\InvalidArgumentException::class);
+        $middleware->handle($request);
+    }
+
+    /**
+     * @return array
+     */
+    protected function getMocks(): array
+    {
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->getMockForAbstractClass(ServerRequestInterface::class);
+        /** @var RequestHandlerInterface|MockObject $handler */
+        $handler = $this->getMockForAbstractClass(RequestHandlerInterface::class);
+        /** @var Response|MockObject $response */
+        $response = $this->createMock(Response::class);
+        /** @var callable|MockObject $callable */
+        $callable = $this->getMockBuilder(stdClass::class)
+            ->setMethods(['__invoke'])
+            ->getMock();
+        return [$request, $response, $callable, $handler];
+    }
+}