From f3b3b6683ca90b70ec4d4daae002dc0caac9ebdd Mon Sep 17 00:00:00 2001
From: Igor Scheller <igor.scheller@igorshp.de>
Date: Sat, 11 Aug 2018 23:46:28 +0200
Subject: Added middleware tests

---
 tests/Unit/Middleware/DispatcherTest.php           | 230 +++++++++++++++++++++
 tests/Unit/Middleware/ExceptionHandlerTest.php     |  58 ++++++
 tests/Unit/Middleware/LegacyMiddlewareTest.php     |  85 ++++++++
 tests/Unit/Middleware/NotFoundResponseTest.php     |  39 ++++
 tests/Unit/Middleware/SendResponseHandlerTest.php  |  71 +++++++
 .../Middleware/Stub/ExceptionMiddlewareHandler.php |  23 +++
 tests/Unit/Middleware/Stub/NotARealMiddleware.php  |   8 +
 .../Middleware/Stub/ReturnResponseMiddleware.php   |  36 ++++
 .../Stub/ReturnResponseMiddlewareHandler.php       |  30 +++
 9 files changed, 580 insertions(+)
 create mode 100644 tests/Unit/Middleware/DispatcherTest.php
 create mode 100644 tests/Unit/Middleware/ExceptionHandlerTest.php
 create mode 100644 tests/Unit/Middleware/LegacyMiddlewareTest.php
 create mode 100644 tests/Unit/Middleware/NotFoundResponseTest.php
 create mode 100644 tests/Unit/Middleware/SendResponseHandlerTest.php
 create mode 100644 tests/Unit/Middleware/Stub/ExceptionMiddlewareHandler.php
 create mode 100644 tests/Unit/Middleware/Stub/NotARealMiddleware.php
 create mode 100644 tests/Unit/Middleware/Stub/ReturnResponseMiddleware.php
 create mode 100644 tests/Unit/Middleware/Stub/ReturnResponseMiddlewareHandler.php

(limited to 'tests')

diff --git a/tests/Unit/Middleware/DispatcherTest.php b/tests/Unit/Middleware/DispatcherTest.php
new file mode 100644
index 00000000..c01c5029
--- /dev/null
+++ b/tests/Unit/Middleware/DispatcherTest.php
@@ -0,0 +1,230 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Middleware;
+
+use Engelsystem\Application;
+use Engelsystem\Middleware\Dispatcher;
+use Engelsystem\Test\Unit\Middleware\Stub\NotARealMiddleware;
+use Engelsystem\Test\Unit\Middleware\Stub\ReturnResponseMiddleware;
+use InvalidArgumentException;
+use LogicException;
+use PHPUnit\Framework\TestCase;
+use PHPUnit_Framework_MockObject_MockObject as MockObject;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use ReflectionClass as Reflection;
+
+class DispatcherTest extends TestCase
+{
+    /**
+     * @covers \Engelsystem\Middleware\Dispatcher::__construct
+     */
+    public function testInit()
+    {
+        /** @var Application|MockObject $container */
+        $container = $this->createMock(Application::class);
+
+        $dispatcher = new Dispatcher([], $container);
+        $this->assertInstanceOf(MiddlewareInterface::class, $dispatcher);
+        $this->assertInstanceOf(RequestHandlerInterface::class, $dispatcher);
+
+        $reflection = new Reflection(get_class($dispatcher));
+        $property = $reflection->getProperty('container');
+        $property->setAccessible(true);
+        $this->assertEquals($container, $property->getValue($dispatcher));
+    }
+
+    /**
+     * @covers \Engelsystem\Middleware\Dispatcher::process
+     */
+    public function testProcess()
+    {
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->createMock(ServerRequestInterface::class);
+        /** @var ResponseInterface|MockObject $response */
+        $response = $this->createMock(ResponseInterface::class);
+        /** @var RequestHandlerInterface|MockObject $handler */
+        $handler = $this->createMock(RequestHandlerInterface::class);
+
+        /** @var Dispatcher|MockObject $dispatcher */
+        $dispatcher = $this->getMockBuilder(Dispatcher::class)
+            ->setMethods(['handle'])
+            ->getMock();
+
+        $dispatcher->expects($this->once())
+            ->method('handle')
+            ->willReturn($response);
+
+        $return = $dispatcher->process($request, $handler);
+        $this->assertEquals($response, $return);
+
+        $reflection = new Reflection(get_class($dispatcher));
+        $property = $reflection->getProperty('next');
+        $property->setAccessible(true);
+
+        $this->assertEquals($handler, $property->getValue($dispatcher));
+    }
+
+    /**
+     * @covers \Engelsystem\Middleware\Dispatcher::handle
+     */
+    public function testHandle()
+    {
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->createMock(ServerRequestInterface::class);
+        /** @var ResponseInterface|MockObject $response */
+        $response = $this->createMock(ResponseInterface::class);
+        /** @var MiddlewareInterface|MockObject $middleware */
+        $middleware = $this->createMock(MiddlewareInterface::class);
+
+        $dispatcher = new Dispatcher([$middleware]);
+        $middleware->expects($this->once())
+            ->method('process')
+            ->with($request, $dispatcher)
+            ->willReturn($response);
+
+        $return = $dispatcher->handle($request);
+        $this->assertEquals($response, $return);
+    }
+
+    /**
+     * @covers \Engelsystem\Middleware\Dispatcher::handle
+     */
+    public function testHandleNext()
+    {
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->createMock(ServerRequestInterface::class);
+        /** @var ResponseInterface|MockObject $response */
+        $response = $this->createMock(ResponseInterface::class);
+        /** @var RequestHandlerInterface|MockObject $handler */
+        $handler = $this->createMock(RequestHandlerInterface::class);
+
+        $dispatcher = new Dispatcher();
+        $handler->expects($this->once())
+            ->method('handle')
+            ->with($request)
+            ->willReturn($response);
+
+        $reflection = new Reflection(get_class($dispatcher));
+        $property = $reflection->getProperty('next');
+        $property->setAccessible(true);
+        $property->setValue($dispatcher, $handler);
+
+        $return = $dispatcher->handle($request);
+        $this->assertEquals($response, $return);
+    }
+
+    /**
+     * @covers \Engelsystem\Middleware\Dispatcher::handle
+     */
+    public function testHandleNoMiddleware()
+    {
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->createMock(ServerRequestInterface::class);
+
+        $this->expectException(LogicException::class);
+
+        $dispatcher = new Dispatcher();
+        $dispatcher->handle($request);
+    }
+
+    /**
+     * @covers \Engelsystem\Middleware\Dispatcher::handle
+     */
+    public function testHandleNoRealMiddleware()
+    {
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->createMock(ServerRequestInterface::class);
+
+        $this->expectException(InvalidArgumentException::class);
+
+        $dispatcher = new Dispatcher([new NotARealMiddleware()]);
+        $dispatcher->handle($request);
+    }
+
+    /**
+     * @covers \Engelsystem\Middleware\Dispatcher::handle
+     */
+    public function testHandleCallResolve()
+    {
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->createMock(ServerRequestInterface::class);
+        /** @var ResponseInterface|MockObject $response */
+        $response = $this->createMock(ResponseInterface::class);
+        /** @var MiddlewareInterface|MockObject $middleware */
+        $middleware = $this->createMock(MiddlewareInterface::class);
+
+        /** @var Dispatcher|MockObject $dispatcher */
+        $dispatcher = $this->getMockBuilder(Dispatcher::class)
+            ->setConstructorArgs([[MiddlewareInterface::class]])
+            ->setMethods(['resolveMiddleware'])
+            ->getMock();
+
+        $dispatcher->expects($this->once())
+            ->method('resolveMiddleware')
+            ->with(MiddlewareInterface::class)
+            ->willReturn($middleware);
+
+        $middleware->expects($this->once())
+            ->method('process')
+            ->with($request, $dispatcher)
+            ->willReturn($response);
+
+        $return = $dispatcher->handle($request);
+        $this->assertEquals($response, $return);
+    }
+
+    /**
+     * @covers \Engelsystem\Middleware\Dispatcher::resolveMiddleware
+     * @covers \Engelsystem\Middleware\Dispatcher::setContainer
+     */
+    public function testResolveMiddleware()
+    {
+        /** @var Application|MockObject $container */
+        $container = $this->createMock(Application::class);
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->createMock(ServerRequestInterface::class);
+        /** @var ResponseInterface|MockObject $response */
+        $response = $this->createMock(ResponseInterface::class);
+
+        $returnResponseMiddleware = new ReturnResponseMiddleware($response);
+
+        $container->expects($this->exactly(2))
+            ->method('has')
+            ->withConsecutive([ReturnResponseMiddleware::class], ['middleware'])
+            ->willReturnOnConsecutiveCalls(false, true);
+
+        $container->expects($this->once())
+            ->method('make')
+            ->with(ReturnResponseMiddleware::class)
+            ->willReturn($returnResponseMiddleware);
+
+        $container->expects($this->once())
+            ->method('get')
+            ->with('middleware')
+            ->willReturn($returnResponseMiddleware);
+
+        $dispatcher = new Dispatcher([ReturnResponseMiddleware::class]);
+        $dispatcher->setContainer($container);
+        $dispatcher->handle($request);
+
+        $dispatcher = new Dispatcher(['middleware'], $container);
+        $dispatcher->handle($request);
+    }
+
+    /**
+     * @covers \Engelsystem\Middleware\Dispatcher::resolveMiddleware
+     */
+    public function testResolveMiddlewareNoContainer()
+    {
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->createMock(ServerRequestInterface::class);
+
+        $this->expectException(InvalidArgumentException::class);
+
+        $dispatcher = new Dispatcher([ReturnResponseMiddleware::class]);
+        $dispatcher->handle($request);
+    }
+}
diff --git a/tests/Unit/Middleware/ExceptionHandlerTest.php b/tests/Unit/Middleware/ExceptionHandlerTest.php
new file mode 100644
index 00000000..6d2a20e6
--- /dev/null
+++ b/tests/Unit/Middleware/ExceptionHandlerTest.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Middleware;
+
+use Engelsystem\Application;
+use Engelsystem\Exceptions\Handler;
+use Engelsystem\Http\Response;
+use Engelsystem\Middleware\ExceptionHandler;
+use Engelsystem\Test\Unit\Middleware\Stub\ExceptionMiddlewareHandler;
+use Engelsystem\Test\Unit\Middleware\Stub\ReturnResponseMiddlewareHandler;
+use Illuminate\Contracts\Container\Container as ContainerInterface;
+use PHPUnit\Framework\TestCase;
+use PHPUnit_Framework_MockObject_MockObject as MockObject;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+
+class ExceptionHandlerTest extends TestCase
+{
+    /**
+     * @covers \Engelsystem\Middleware\ExceptionHandler::__construct
+     * @covers \Engelsystem\Middleware\ExceptionHandler::process
+     */
+    public function testRegister()
+    {
+        /** @var MockObject|ContainerInterface $container */
+        $container = $this->getMockForAbstractClass(ContainerInterface::class);
+        /** @var MockObject|ServerRequestInterface $request */
+        $request = $this->getMockBuilder(ServerRequestInterface::class)->getMock();
+        /** @var MockObject|ResponseInterface $response */
+        $response = $this->getMockBuilder(Response::class)->getMock();
+        /** @var MockObject|Handler $errorHandler */
+        $errorHandler = $this->getMockBuilder(Handler::class)->getMock();
+        $returnResponseHandler = new ReturnResponseMiddlewareHandler($response);
+        $throwExceptionHandler = new ExceptionMiddlewareHandler();
+
+        Application::setInstance($container);
+
+        $container->expects($this->exactly(2))
+            ->method('get')
+            ->withConsecutive(['error.handler'], ['psr7.response'])
+            ->willReturnOnConsecutiveCalls($errorHandler, $response);
+
+        $response->expects($this->once())
+            ->method('withContent')
+            ->willReturn($response);
+        $response->expects($this->once())
+            ->method('withStatus')
+            ->with(500)
+            ->willReturn($response);
+
+        $handler = new ExceptionHandler($container);
+        $return = $handler->process($request, $returnResponseHandler);
+        $this->assertEquals($response, $return);
+
+        $return = $handler->process($request, $throwExceptionHandler);
+        $this->assertEquals($response, $return);
+    }
+}
diff --git a/tests/Unit/Middleware/LegacyMiddlewareTest.php b/tests/Unit/Middleware/LegacyMiddlewareTest.php
new file mode 100644
index 00000000..34e60b60
--- /dev/null
+++ b/tests/Unit/Middleware/LegacyMiddlewareTest.php
@@ -0,0 +1,85 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Middleware;
+
+use Engelsystem\Http\Request;
+use Engelsystem\Middleware\LegacyMiddleware;
+use PHPUnit\Framework\TestCase;
+use PHPUnit_Framework_MockObject_MockObject as MockObject;
+use Psr\Container\ContainerInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use Symfony\Component\HttpFoundation\ParameterBag;
+
+class LegacyMiddlewareTest extends TestCase
+{
+    /**
+     * @covers \Engelsystem\Middleware\LegacyMiddleware::__construct
+     * @covers \Engelsystem\Middleware\LegacyMiddleware::process
+     */
+    public function testRegister()
+    {
+        /** @var ContainerInterface|MockObject $container */
+        $container = $this->getMockForAbstractClass(ContainerInterface::class);
+        /** @var LegacyMiddleware|MockObject $middleware */
+        $middleware = $this->getMockBuilder(LegacyMiddleware::class)
+            ->setConstructorArgs([$container])
+            ->setMethods(['loadPage', 'renderPage'])
+            ->getMock();
+        /** @var Request|MockObject $defaultRequest */
+        $defaultRequest = $this->createMock(Request::class);
+        /** @var ParameterBag|MockObject $parameters */
+        $parameters = $this->createMock(ParameterBag::class);
+        /** @var ResponseInterface|MockObject $response */
+        $response = $this->getMockForAbstractClass(ResponseInterface::class);
+        /** @var RequestHandlerInterface|MockObject $handler */
+        $handler = $this->getMockForAbstractClass(RequestHandlerInterface::class);
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->getMockForAbstractClass(ServerRequestInterface::class);
+
+        $middleware->expects($this->exactly(2))
+            ->method('loadPage')
+            ->withConsecutive(['user_worklog'], ['login'])
+            ->willReturnOnConsecutiveCalls(
+                ['title', 'content'],
+                ['title2', 'content2']
+            );
+
+        $middleware->expects($this->exactly(2))
+            ->method('renderPage')
+            ->withConsecutive(
+                ['user_worklog', 'title', 'content'],
+                ['login', 'title2', 'content2']
+            )
+            ->willReturn($response);
+
+        $container->expects($this->atLeastOnce())
+            ->method('get')
+            ->with('request')
+            ->willReturn($defaultRequest);
+
+        $defaultRequest->query = $parameters;
+        $defaultRequest->expects($this->once())
+            ->method('path')
+            ->willReturn('user-worklog');
+
+        $parameters->expects($this->exactly(3))
+            ->method('get')
+            ->with('p')
+            ->willReturnOnConsecutiveCalls(
+                null,
+                'foo',
+                '/'
+            );
+
+        $handler->expects($this->once())
+            ->method('handle')
+            ->with($request)
+            ->willReturn($response);
+
+        $middleware->process($request, $handler);
+        $middleware->process($request, $handler);
+        $middleware->process($request, $handler);
+    }
+}
diff --git a/tests/Unit/Middleware/NotFoundResponseTest.php b/tests/Unit/Middleware/NotFoundResponseTest.php
new file mode 100644
index 00000000..9279e81d
--- /dev/null
+++ b/tests/Unit/Middleware/NotFoundResponseTest.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Middleware;
+
+use Engelsystem\Middleware\NotFoundResponse;
+use PHPUnit\Framework\TestCase;
+use PHPUnit_Framework_MockObject_MockObject as MockObject;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+
+class NotFoundResponseTest extends TestCase
+{
+    /**
+     * @covers \Engelsystem\Middleware\NotFoundResponse::process
+     */
+    public function testRegister()
+    {
+        /** @var NotFoundResponse|MockObject $middleware */
+        $middleware = $this->getMockBuilder(NotFoundResponse::class)
+            ->setMethods(['renderPage'])
+            ->getMock();
+        /** @var ResponseInterface|MockObject $response */
+        $response = $this->getMockForAbstractClass(ResponseInterface::class);
+        /** @var RequestHandlerInterface|MockObject $handler */
+        $handler = $this->getMockForAbstractClass(RequestHandlerInterface::class);
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->getMockForAbstractClass(ServerRequestInterface::class);
+
+        $middleware->expects($this->once())
+            ->method('renderPage')
+            ->willReturn($response);
+
+        $handler->expects($this->never())
+            ->method('handle');
+
+        $middleware->process($request, $handler);
+    }
+}
diff --git a/tests/Unit/Middleware/SendResponseHandlerTest.php b/tests/Unit/Middleware/SendResponseHandlerTest.php
new file mode 100644
index 00000000..7431299e
--- /dev/null
+++ b/tests/Unit/Middleware/SendResponseHandlerTest.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Middleware;
+
+use Engelsystem\Middleware\SendResponseHandler;
+use PHPUnit\Framework\TestCase;
+use PHPUnit_Framework_MockObject_MockObject as MockObject;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+
+class SendResponseHandlerTest extends TestCase
+{
+    /**
+     * @covers \Engelsystem\Middleware\SendResponseHandler::process
+     */
+    public function testRegister()
+    {
+        /** @var SendResponseHandler|MockObject $middleware */
+        $middleware = $this->getMockBuilder(SendResponseHandler::class)
+            ->setMethods(['headersSent', 'sendHeader'])
+            ->getMock();
+        /** @var ServerRequestInterface|MockObject $request */
+        $request = $this->getMockForAbstractClass(ServerRequestInterface::class);
+        /** @var ResponseInterface|MockObject $response */
+        $response = $this->getMockForAbstractClass(ResponseInterface::class);
+        /** @var RequestHandlerInterface|MockObject $handler */
+        $handler = $this->getMockForAbstractClass(RequestHandlerInterface::class);
+
+        $middleware->expects($this->atLeastOnce())
+            ->method('headersSent')
+            ->willReturnOnConsecutiveCalls(true, false);
+
+        $middleware->expects($this->exactly(4))
+            ->method('sendHeader')
+            ->withConsecutive(
+                ['HTTP/0.7 505 Something went wrong!', true, 505],
+                ['Foo: bar', false],
+                ['lorem: ipsum', false],
+                ['lorem: dolor', false]
+            );
+
+        $handler->expects($this->exactly(2))
+            ->method('handle')
+            ->with($request)
+            ->willReturn($response);
+
+        $response->expects($this->exactly(2))
+            ->method('getBody')
+            ->willReturn('Lorem Ipsum!');
+
+        $response->expects($this->atLeastOnce())
+            ->method('getProtocolVersion')
+            ->willReturn('0.7');
+
+        $response->expects($this->atLeastOnce())
+            ->method('getStatusCode')
+            ->willReturn(505);
+
+        $response->expects($this->once())
+            ->method('getReasonPhrase')
+            ->willReturn('Something went wrong!');
+        $response->expects($this->once())
+            ->method('getHeaders')
+            ->willReturn(['Foo' => ['bar'], 'lorem' => ['ipsum', 'dolor']]);
+
+        $this->expectOutputString('Lorem Ipsum!Lorem Ipsum!');
+        $middleware->process($request, $handler);
+        $middleware->process($request, $handler);
+    }
+}
diff --git a/tests/Unit/Middleware/Stub/ExceptionMiddlewareHandler.php b/tests/Unit/Middleware/Stub/ExceptionMiddlewareHandler.php
new file mode 100644
index 00000000..5e374bea
--- /dev/null
+++ b/tests/Unit/Middleware/Stub/ExceptionMiddlewareHandler.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Middleware\Stub;
+
+use Exception;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+
+class ExceptionMiddlewareHandler implements RequestHandlerInterface
+{
+    /**
+     * Throws an exception
+     *
+     * @param ServerRequestInterface $request
+     * @return ResponseInterface
+     * @throws Exception
+     */
+    public function handle(ServerRequestInterface $request): ResponseInterface
+    {
+        throw new Exception('Boooom!');
+    }
+}
diff --git a/tests/Unit/Middleware/Stub/NotARealMiddleware.php b/tests/Unit/Middleware/Stub/NotARealMiddleware.php
new file mode 100644
index 00000000..017389da
--- /dev/null
+++ b/tests/Unit/Middleware/Stub/NotARealMiddleware.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Middleware\Stub;
+
+class NotARealMiddleware
+{
+    // I'm not a middleware!
+}
diff --git a/tests/Unit/Middleware/Stub/ReturnResponseMiddleware.php b/tests/Unit/Middleware/Stub/ReturnResponseMiddleware.php
new file mode 100644
index 00000000..7c241353
--- /dev/null
+++ b/tests/Unit/Middleware/Stub/ReturnResponseMiddleware.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Middleware\Stub;
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+
+class ReturnResponseMiddleware implements MiddlewareInterface
+{
+    /** @var ResponseInterface */
+    protected $response;
+
+    public function __construct(ResponseInterface $response)
+    {
+        $this->response = $response;
+    }
+
+    /**
+     * Process an incoming server request and return a response, optionally delegating
+     * response creation to a handler.
+     *
+     * Could be used to group middleware
+     *
+     * @param ServerRequestInterface  $request
+     * @param RequestHandlerInterface $handler
+     * @return ResponseInterface
+     */
+    public function process(
+        ServerRequestInterface $request,
+        RequestHandlerInterface $handler
+    ): ResponseInterface {
+        return $this->response;
+    }
+}
diff --git a/tests/Unit/Middleware/Stub/ReturnResponseMiddlewareHandler.php b/tests/Unit/Middleware/Stub/ReturnResponseMiddlewareHandler.php
new file mode 100644
index 00000000..323e07b4
--- /dev/null
+++ b/tests/Unit/Middleware/Stub/ReturnResponseMiddlewareHandler.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Middleware\Stub;
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+
+class ReturnResponseMiddlewareHandler implements RequestHandlerInterface
+{
+    /** @var ResponseInterface */
+    protected $response;
+
+    public function __construct(ResponseInterface $response)
+    {
+        $this->response = $response;
+    }
+
+    /**
+     * Returns a given response
+     *
+     * @param ServerRequestInterface $request
+     * @return ResponseInterface
+     * @throws \Exception
+     */
+    public function handle(ServerRequestInterface $request): ResponseInterface
+    {
+        return $this->response;
+    }
+}
-- 
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