Refactored CheckRequest and CheckResponse traits

WIP Controller\Output
Restructuring the tests (one test per trait)

13 files changed, 1454 insertions, 768 deletions

diff --git a/tests/Controller/CheckRequestTest.php b/tests/Controller/CheckRequestTest.php
new file mode 100644
index 0000000..8ba2e23
--- /dev/null
+++ b/tests/Controller/CheckRequestTest.php
@@ -0,0 +1,87 @@
+<?php
+
+namespace Jasny\Controller;
+
+use Psr\Http\Message\ServerRequestInterface;
+use Jasny\Controller\TestHelper;
+
+/**
+ * @covers Jasny\Controller\CheckRequest
+ */
+class CheckRequestTest extends \PHPUnit_Framework_TestCase
+{
+    use TestHelper;
+
+    /**
+     * Provide data for testing functions that determine request method
+     *
+     * @return array
+     */
+    public function requestMethodProvider()
+    {
+        return [
+            ['GET'], ['POST'], ['PUT'], ['DELETE'], ['HEAD']
+        ];
+    }
+
+    /**
+     * Test functions that check request method
+     *
+     * @dataProvider requestMethodProvider
+     * @param string $method
+     */
+    public function testRequestMethod($method)
+    {
+        $request = $this->createMock(ServerRequestInterface::class);
+        $request->method('getMethod')->will($this->returnValue($method));
+
+        $controller = $this->getController(['getRequest']);
+        $controller->method('getRequest')->will($this->returnValue($request));
+
+        $this->assertEquals($method === 'GET', $controller->isGetRequest());
+        $this->assertEquals($method === 'POST', $controller->isPostRequest());
+        $this->assertEquals($method === 'PUT', $controller->isPutRequest());
+        $this->assertEquals($method === 'DELETE', $controller->isDeleteRequest());
+        $this->assertEquals($method === 'HEAD', $controller->isHeadRequest());
+    }
+
+    /**
+     * Provide data fot testing 'getLocalReferer' function
+     *
+     * @return array
+     */
+    public function localRefererProvider()
+    {
+        return [
+            ['http://google.com/path', 'example.com', null],
+            ['http://example.com/', 'example.com', '/'],
+            ['http://www.example.com/path', 'example.com', null],
+        ];
+    }
+
+    /**
+     * Test 'getLocalReferer' funtion
+     *
+     * @dataProvider localRefererProvider
+     * @param string $referer
+     * @param string $host
+     * @param boolean $local
+     */
+    public function testLocalReferer($referer, $host, $local)
+    {
+        $request = $this->createMock(ServerRequestInterface::class);
+        $request->expects($this->exactly(2))->method('getHeaderLine')->withConsecutive(
+            [$this->equalTo('HTTP_REFERER')],
+            [$this->equalTo('HTTP_HOST')]
+        )->willReturnOnConsecutiveCalls($referer, $host);
+
+        $controller = $this->getController(['getRequest']);
+        $controller->method('getRequest')->will($this->returnValue($request));
+
+        $result = $controller->getLocalReferer();
+
+        $local ?
+            $this->assertEquals($referer, $result, "Local referer should be returned") :
+            $this->assertEquals('', $result, "Local referer should not be returned");
+    }
+}
diff --git a/tests/Controller/CheckResponseTest.php b/tests/Controller/CheckResponseTest.php
new file mode 100644
index 0000000..e43b5b5
--- /dev/null
+++ b/tests/Controller/CheckResponseTest.php
@@ -0,0 +1,53 @@
+<?php
+
+use Psr\Http\Message\ResponseInterface;
+use Jasny\Controller\TestHelper;
+
+/**
+ * @covers Jasny\Controller\CheckResponse
+ */
+class ControllerTest extends PHPUnit_Framework_TestCase
+{
+    use TestHelper;
+
+    /**
+     * Provide data for testing status methods
+     *
+     * @return array
+     */
+    public function responseStatusProvider()
+    {
+        return [
+            [null, 'successful'],
+            [100, 'informational'], [199, 'informational'],
+            [200, 'successful'], [201, 'successful'], [299, 'successful'],
+            [300, 'redirect'], [304, 'redirect'], [399, 'redirect'],
+            [400, 'client error'], [403, 'client error'], [499, 'client error'],
+            [500, 'server error'], [503, 'server error'],
+            [999, 'unkown']
+        ];
+    }
+
+    /**
+     * Test functions that check response status code
+     * @dataProvider responseStatusProvider
+     * 
+     * @param int    $code status code
+     * @param string $type
+     */
+    public function testResponseStatus($code, $type)
+    {
+        $response = $this->createMock(ResponseInterface::class);
+        $response->method('getStatusCode')->will($this->returnValue($code));
+
+        $controller = $this->getController(['getResponse']);
+        $controller->method('getResponse')->willReturn($response);
+
+        $this->assertSame($type === 'informational', $controller->isInformational(), 'isInformational');
+        $this->assertSame($type === 'successful', $controller->isSuccessful(), 'isSuccessful');
+        $this->assertSame($type === 'redirect', $controller->isRedirection(), 'isRedirection');
+        $this->assertSame($type === 'client error', $controller->isClientError(), 'isClientError');
+        $this->assertSame($type === 'server error', $controller->isServerError(), 'isServerError');
+        $this->assertSame(in_array($type, ['client error', 'server error']), $controller->isError(), 'isError');
+    }
+}
diff --git a/tests/Controller/OutputTest.php b/tests/Controller/OutputTest.php
new file mode 100644
index 0000000..9952d6f
--- /dev/null
+++ b/tests/Controller/OutputTest.php
@@ -0,0 +1,499 @@
+<?php
+
+namespace Jasny\Controller;
+
+use Jasny\Controller;
+use Jasny\Flash;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\StreamInterface;
+use Jasny\Controller\TestHelper;
+
+/**
+ * @covers Jasny\Controller\Output
+ */
+class OutputTest extends \PHPUnit_Framework_TestCase
+{
+    use TestHelper;
+
+    /**
+     * Provide data for testing error messages functions
+     *
+     * @return array
+     */
+    public function statusProvider()
+    {
+        return [
+            ['ok', 200],
+            ['created', 201],
+            ['accepted', 202],
+            ['noContent', 204],
+            ['partialContent', 206],
+            
+            ['redirect', 303, ['example.com']],
+            ['back', 303],
+            ['notModified', 304],
+            
+            ['badRequest', 400],
+            ['requireAuth', 401],
+            ['requireLogin', 401],
+            ['paymentRequired', 402],
+            ['forbidden', 403],
+            ['notFound', 404],
+            ['conflict', 409],
+            ['tooManyRequests', 429]
+        ];
+    }
+    
+    /**
+     * Test functions that deal with error messages
+     * @dataProvider statusProvider
+     * 
+     * @param string $function
+     * @param int    $code      Status code
+     * @param array  $args
+     */
+    public function testImplicitStatus($function, $code, $args = [])
+    {
+        $response = $this->createMock(ResponseInterface::class);
+        $response->expects($this->once())->method('withStatus')->with($code)->willReturnSelf();
+        $response->expects($this->any())->method('withHeader')->willReturnSelf();
+
+        $controller = $this->getController(['getResponse']);
+        $controller->method('getResponse')->willReturn($response);
+
+        $controller->$function(...$args);
+    }
+
+    
+    /**
+     * Test functions that deal with error messages
+     * @dataProvider statusProvider
+     * 
+     * @param string $function
+     * @param int    $code      Status code
+     */
+    public function testImplicitStatusMessage($function, $code, $args)
+    {
+        $message = 'Test message';
+
+        $stream = $this->createMock(StreamInterface::class);
+        $stream->expects($this->once())->method('write')->with($message);
+
+        $response = $this->createMock(ResponseInterface::class);
+        $response->expects($this->once())->method('withStatus')->with($code)->willReturnSelf();
+        $response->expects($this->once())->method('getBody')->willReturn($stream);
+
+        $controller = $this->getController(['getResponse']);
+        $controller->method('getResponse')->willReturn($response);
+
+        
+        
+        $this->assertEquals($result, $response, "Response object should be returned");
+    }
+    
+    /**
+     * Test setting flash
+     *
+     * @dataProvider flashProvider
+     * @param object $data 
+     */
+    public function testFlash($data)
+    {
+        $controller = $this->getMockBuilder(Controller::class)->disableOriginalConstructor()->getMockForAbstractClass();
+
+        $flash = $controller->flash();
+        $this->assertInstanceOf(Flash::class, $flash, "Flash is not set");
+        $this->assertEmpty($flash->get(), "Flash data should be empty");        
+
+        $flash = $controller->flash($data->type, $data->message);
+        $this->assertInstanceOf(Flash::class, $flash, "Flash is not set");
+        $this->assertEquals($data, $flash->get(), "Flash data is incorrect");
+
+        $flash = $controller->flash();
+        $this->assertInstanceOf(Flash::class, $flash, "Flash is not set");
+        $this->assertEquals($data, $flash->get(), "Flash data is incorrect");
+
+        $flash->clear();
+    }
+
+    /**
+     * Test setting flash
+     *
+     * @return array
+     */
+    public function flashProvider()
+    {
+        return [
+            [(object)['type' => 'test_type', 'message' => 'Test message']]
+        ];  
+    }
+
+    /**
+     * Test respondWith function
+     *
+     * @dataProvider respondWithProvider
+     * @param int|string $code
+     * @param string $format 
+     * @param int $setCode      Actual code that will be set in response
+     * @param string $contentType 
+     */
+    public function testRespondWith($code, $format, $setCode, $contentType)
+    {
+        $controller = $this->getController(['getResponse']);
+        list(, $response) = $this->getRequests();                
+
+        $this->expectResponseWith($response, $setCode, $contentType);
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $controller->respondWith($code, $format);
+
+        $this->assertEquals($result, $response, "Response object should be returned");
+    }
+
+    /**
+     * Test function respondWith
+     *
+     * @return array
+     */
+    public function respondWithProvider()
+    {
+        return [
+            [200, 'json', 200, 'application/json'],
+            [200, 'application/json', 200, 'application/json'],
+            [204, null, 204, null],
+            ['204 Created', null, 204, null],
+            ['json', null, null, 'application/json']
+        ];  
+    }
+
+    /**
+     * Test functions that are simple wrappers around respondWith function
+     *
+     * @dataProvider respondWithWrappersProvider
+     * @param string $function
+     * @param int $code
+     */
+    public function testResponseWithWrappers($function, $code)
+    {
+        $controller = $this->getController(['getResponse']);
+        list(, $response) = $this->getRequests();                
+
+        $this->expectResponseWith($response, $code);
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $controller->{$function}();
+
+        $this->assertEquals($result, $response, "Response object should be returned");   
+    }
+
+    /**
+     * Provide data for testing respondWith wrappers
+     *
+     * @return array
+     */
+    public function respondWithWrappersProvider()
+    {
+        return [
+            ['ok', 200],
+            ['noContent', 204]
+        ];
+    }
+
+    /**
+     * Test 'created' function
+     *
+     * @dataProvider createdProvider
+     * @param string $location
+     */
+    public function testCreated($location)
+    {
+        $controller = $this->getController(['getResponse']);
+        list(, $response) = $this->getRequests();                
+
+        $response->expects($this->once())->method('withStatus')->with($this->equalTo(201))->will($this->returnSelf());
+        if ($location) {
+            $response->expects($this->once())->method('withHeader')->with($this->equalTo('Location'), $this->equalTo($location))->will($this->returnSelf());
+        }
+
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $controller->created($location);
+
+        $this->assertEquals($result, $response, "Response object should be returned");   
+    }
+
+    /**
+     * Provide data for testing 'created' function
+     *
+     * @return array
+     */
+    public function createdProvider()
+    {
+        return [
+            [''], ['/some-path/test']
+        ];
+    }
+
+    /**
+     * Test 'redirect' function
+     *
+     * @dataProvider redirectProvider
+     * @param string $url 
+     * @param int $code 
+     * @param boolean $default
+     */
+    public function testRedirect($url, $code, $default)
+    {
+        $controller = $this->getController(['getResponse']);
+        list(, $response) = $this->getRequests();                        
+
+        $this->expectRedirect($response, $url, $code);
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $default ? 
+            $controller->redirect($url) :
+            $controller->redirect($url, $code);
+
+        $this->assertEquals($result, $response, "Response object should be returned");   
+    }
+
+    /**
+     * Provide data for testing 'redirect' function
+     *
+     * @return array
+     */
+    public function redirectProvider()
+    {
+        return [
+            ['/test-url', 303, true], 
+            ['/test-url', 301, false]
+        ];
+    }
+
+    /**
+     * Test 'requireLogin' function
+     *
+     * @dataProvider requireLoginProvider
+     * @param string $function
+     */
+    public function testRequireLogin($function)
+    {
+        $controller = $this->getController(['getResponse']);
+        list(, $response) = $this->getRequests();                        
+
+        $this->expectRedirect($response, '/401', 303);
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $controller->{$function}();
+
+        $this->assertEquals($result, $response, "Response object should be returned");   
+    }
+
+    /**
+     * Provide data for testing 'requireLogon' function
+     *
+     * @return array
+     */
+    public function requireLoginProvider()
+    {
+        return [
+            ['requireLogin'], ['requireAuth']
+        ];
+    }
+
+    /**
+     * Test 'getLocalReferer' funtion
+     *
+     * @dataProvider localRefererProvider
+     * @param string $referer
+     * @param string $host 
+     * @param boolean $local
+     */
+    public function testLocalReferer($referer, $host, $local)
+    {
+        $controller = $this->getController(['getRequest']);
+        list($request) = $this->getRequests();                        
+
+        $this->expectLocalReferer($request, $referer, $host);
+        $controller->method('getRequest')->will($this->returnValue($request));
+
+        $result = $controller->getLocalReferer();
+
+        $local ?
+            $this->assertEquals($referer, $result, "Local referer should be returned") :      
+            $this->assertEquals('', $result, "Local referer should not be returned");
+    }
+
+    /**
+     * Test 'back' function
+     *
+     * @dataProvider localRefererProvider
+     * @param string $referer
+     * @param string $host 
+     * @param boolean $local
+     */
+    public function testBack($referer, $host, $local)
+    {
+        $controller = $this->getController(['getRequest', 'getResponse']);
+        list($request, $response) = $this->getRequests();        
+
+        $this->expectLocalReferer($request, $referer, $host);
+        $this->expectRedirect($response, $local ? $referer : '/', 303);
+
+        $controller->method('getRequest')->will($this->returnValue($request));
+        $controller->method('getResponse')->will($this->returnValue($response));        
+
+        $result = $controller->back();
+
+        $this->assertEquals($result, $response, "Response object should be returned");   
+    }
+
+    /**
+     * Provide data fot testing 'getLocalReferer' function
+     *
+     * @return array
+     */
+    public function localRefererProvider()
+    {
+        return [
+            ['http://not-local-host.com/path', 'local-host.com', false],
+            ['http://local-host.com/path', 'local-host.com', true]
+        ];  
+    }
+
+    /**
+     * Expect for 'getLocalReferer' function to work correctly
+     *
+     * @param ServerRequestInterface $request
+     * @param string $referer
+     * @param string $host 
+     */
+    public function expectLocalReferer($request, $referer, $host)
+    {
+        $request->expects($this->exactly(2))->method('getHeaderLine')->withConsecutive(
+            [$this->equalTo('HTTP_REFERER')],
+            [$this->equalTo('HTTP_HOST')]
+        )->will($this->returnCallback(function($header) use ($referer, $host) {
+            return $header === 'HTTP_REFERER' ? $referer : $host;
+        }));
+    }
+
+    /**
+     * Expect for redirect
+     *
+     * @param ResponseInterface $response
+     * @param string $url
+     * @param int $code 
+     */
+    public function expectRedirect($response, $url, $code)     
+    {
+        $stream = $this->createMock(StreamInterface::class);
+        $stream->expects($this->once())->method('write')->with($this->equalTo('You are being redirected to <a href="' . $url . '">' . $url . '</a>'));   
+
+        $response->expects($this->once())->method('getBody')->will($this->returnValue($stream));
+        $response->expects($this->once())->method('withStatus')->with($this->equalTo($code))->will($this->returnSelf());
+        $response->expects($this->exactly(2))->method('withHeader')->withConsecutive(
+            [$this->equalTo('Content-Type'), $this->equalTo('text/html')],
+            [$this->equalTo('Location'), $this->equalTo($url)]
+        )->will($this->returnSelf());
+    }
+
+    /**
+     * Expect correct work of respondWith function
+     *
+     * @param ResponseInterface $response
+     * @param int $code
+     * @param string $contentType
+     */
+    public function expectResponseWith($response, $code, $contentType = null)
+    {
+        $code ?
+            $response->expects($this->once())->method('withStatus')->with($this->equalTo($code))->will($this->returnSelf()) :
+            $response->expects($this->never())->method('withStatus')->with($this->equalTo($code));            
+
+        $contentType ?
+            $response->expects($this->once())->method('withHeader')->with($this->equalTo('Content-Type'), $this->equalTo($contentType))->will($this->returnSelf()) :
+            $response->expects($this->never())->method('withHeader')->with($this->equalTo('Content-Type'), $this->equalTo($contentType));
+    }
+
+    /**
+     * Expects that output will be set to content
+     *
+     * @param ResponseInterface $response
+     * @param string $content 
+     * @param string $contentType 
+     */
+    public function expectOutput($response, $content, $contentType)
+    {
+        $stream = $this->createMock(StreamInterface::class);
+        $stream->expects($this->once())->method('write')->with($this->equalTo($content));
+
+        $response->expects($this->once())->method('withHeader')->with($this->equalTo('Content-Type'), $this->equalTo($contentType))->will($this->returnSelf());
+        $response->expects($this->once())->method('getBody')->will($this->returnValue($stream));
+    }
+
+    /**
+     * Provide data for testing output
+     *
+     * @return array
+     */
+    public function outputProvider()
+    {
+        $xml = simplexml_load_string(
+            "<?xml version='1.0'?> 
+             <document>
+                 <tag1>Test tag</tag1>
+                 <tag2>Test</tag2>
+            </document>"
+        );
+
+        return [
+            ['test_string', 'text', 'text/plain'],
+            ['javascript:test_call();', 'js', 'application/javascript'],
+            ['test {}', 'css', 'text/css'],
+            ['{ "testKey": "testValue" }', 'json', 'application/json'],
+            [['testKey' => 'testValue'], 'json', 'application/json'],
+            [$xml, 'xml', 'application/xml']
+        ];
+    }
+
+    /**
+     * Test output
+     *
+     * @dataProvider outputProvider
+     * @param mixed $data
+     * @param string $format
+     * @param string $contentType
+     */
+    public function testOutput($data, $format, $contentType)
+    {
+        $response = $this->createMock(ResponseInterface::class);
+        
+        $controller = $this->getController(['getResponse']);
+        $controller->method('getResponse')->willReturn($response);
+
+        if (is_scalar($data)) {
+            $content = $data;
+        } elseif ($format === 'json') {
+            $content = json_encode($data);
+
+            if ($callback) $content = "$callback($content)";                
+        } elseif ($format === 'xml') {
+            $content = $data->asXML();
+        }
+
+        $this->expectOutput($response, $content, $contentType);  
+
+        if ($callback) {
+            $request->method('getQueryParams')->will($this->returnValue(['callback' => $callback]));
+        }      
+
+        $controller->method('getRequest')->will($this->returnValue($request));
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $controller->output($data, $format);
+
+        $this->assertEquals($result, $response, "Output should return response instance");
+    }
+}
diff --git a/tests/Controller/RouteActionTest.php b/tests/Controller/RouteActionTest.php
index edc4bd7..cd630e0 100644
--- a/tests/Controller/RouteActionTest.php
+++ b/tests/Controller/RouteActionTest.php
@@ -1,7 +1,6 @@
 <?php
 
-require_once dirname(__DIR__) . '/support/TestController.php';
-
+use Jasny\Controller;
 use Jasny\Controller\RouteAction;
 use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Message\ResponseInterface;
diff --git a/tests/FlashTest.php b/tests/Controller/Session/FlashTest.php
index c17c446..c17c446 100644
--- a/tests/FlashTest.php
+++ b/tests/Controller/Session/FlashTest.php
diff --git a/tests/Controller/SessionTest.php b/tests/Controller/SessionTest.php
new file mode 100644
index 0000000..b6a6b2d
--- /dev/null
+++ b/tests/Controller/SessionTest.php
@@ -0,0 +1,750 @@
+<?php
+
+use Jasny\Controller;
+use Jasny\Flash;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * @covers Jasny\Controller
+ */
+class ControllerTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * Get mock for controller
+     *
+     * @param array $methods  Methods to mock
+     * @return Controller
+     */
+    public function getController($methods = [])
+    {
+        $builder = $this->getMockBuilder(Controller::class)->disableOriginalConstructor();
+        if ($methods) {
+            $builder->setMethods($methods);
+        }
+
+        return $builder->getMockForAbstractClass();
+    }
+
+    /**
+     * Test running controller
+     */
+    public function testInvoke()
+    {
+        $test = $this;
+        $controller = $this->getController();
+        
+        $request = $this->createMock(ServerRequestInterface::class);
+        $response = $this->createMock(ResponseInterface::class);
+        $finalResponse = $this->createMock(ResponseInterface::class);
+
+        $controller->expects($this->once())->method('run')
+            ->willReturnCallback(Closure::bind(function() use ($test, $request, $response, $finalResponse) {
+                $test->assertSame($request, $this->getRequest());
+                $test->assertSame($response, $this->getResponse());
+                
+                return $finalResponse;
+            }, $controller, Controller::class));
+
+        $result = $controller($request, $response);
+
+        $this->assertEquals($finalResponse, $result);
+    }
+
+    /**
+     * Test response status functions if response object is not set
+     */
+    public function testResponseStatusEmptyResponse()
+    {
+        $controller = $this->getController();   
+        $data = $this->getStatusCodesMap(null);
+
+        foreach ($data as $func => $value) {
+            $this->assertEquals($value, $controller->$func(), "Method '$func' returns incorrect value");
+        }
+    }
+
+    /**
+     * Test functions that check response status code
+     *
+     * @dataProvider responseStatusProvider
+     * @param int  status code
+     */
+    public function testResponseStatus($code)
+    {
+        $controller = $this->getController();
+        list($request, $response) = $this->getRequests();
+        $response->method('getStatusCode')->will($this->returnValue($code));
+
+        $controller($request, $response);                
+
+        $data = $this->getStatusCodesMap($code);
+
+        foreach ($data as $func => $value) {
+            $this->assertEquals($value, $controller->$func(), "Method '$func' returns incorrect value");
+        }
+
+        $this->assertEquals($data['isClientError'] || $data['isServerError'], $controller->isError()
+            , "Method 'isError' returns incorrect value");
+    }
+
+    /**
+     * Provide data for testing status methods
+     *
+     * @return array
+     */
+    public function responseStatusProvider()
+    {
+        return [
+            [null], [199],
+            [200], [201], [299],
+            [300], [304], [399],
+            [400], [403], [499],
+            [500], [503]
+        ];
+    }
+
+    /**
+     * Test functions that check request method
+     *
+     * @dataProvider requestMethodProvider
+     * @param string $method
+     */
+    public function testRequestMethod($method)
+    {
+        $controller = $this->getController();
+        list($request, $response) = $this->getRequests();
+        $request->method('getMethod')->will($this->returnValue($method));
+
+        $controller($request, $response);                
+
+        $data = $this->getMethodsMap($method);
+
+        foreach ($data as $func => $value) {
+            $this->assertEquals($value, $controller->$func(), "Method '$func' returns incorrect value");
+        }
+    }
+
+    /**
+     * Provide data for testing functions that determine request method
+     *
+     * @return array
+     */
+    public function requestMethodProvider()
+    {
+        return [
+            ['GET'], ['POST'], ['PUT'], ['DELETE'], ['HEAD']
+        ];
+    }
+    
+    /**
+     * Test encodeData method, positive tests
+     *
+     * @dataProvider encodeDataPositiveProvider
+     * @param mixed $data
+     * @param string $format 
+     * @param string $callback  Callback name for testing jsonp request
+     */
+    public function testEncodeDataPositive($data, $format, $callback = null)
+    {
+        $this->markTestSkipped();
+        
+        $controller = $this->getController(['getRequest']);
+        list($request) = $this->getRequests();
+
+        if ($callback) {
+            $request->method('getQueryParams')->will($this->returnValue(['callback' => $callback]));
+        }
+
+        $controller->method('getRequest')->will($this->returnValue($request));
+
+        $result = $controller->encodeData($data, $format);
+        $expect = null;
+
+        if ($format === 'json') {
+            $expect = json_encode($data);
+
+            if ($callback) $expect = "$callback($expect)";                
+        } else {
+            $expect = $data->asXML();
+        }
+
+        $this->assertNotEmpty($result, "Result should not be empty");
+        $this->assertEquals($expect, $result, "Data was not encoded correctly");
+    }
+
+    /**
+     * Provide data for testing encodeData method
+     *
+     * @return array
+     */
+    public function encodeDataPositiveProvider()
+    {
+        $xml = simplexml_load_string(
+            "<?xml version='1.0'?> 
+             <document>
+                 <tag1>Test tag</tag1>
+                 <tag2>Test</tag2>
+            </document>"
+        );
+
+        return [
+            ['test_string', 'json'],
+            [['testKey' => 'testValue'], 'json'],
+            [['testKey' => 'testValue'], 'json', 'test_callback'],
+            ['', 'json'],
+            ['', 'json', 'test_callback'],
+            [$xml, 'xml']
+        ];
+    }
+
+    /**
+     * Test encodeData method, negative tests
+     *
+     * @dataProvider encodeDataNegativeProvider
+     * @param mixed $data
+     * @param string $format
+     */
+    public function testEncodeDataNegative($data, $format)
+    {
+        $this->markTestSkipped();
+        
+        $controller = $this->getController(['getRequest']);
+        list($request) = $this->getRequests();
+
+        $controller->method('getRequest')->will($this->returnValue($request));
+        $this->expectException(\InvalidArgumentException::class);
+
+        $result = $controller->encodeData($data, $format);
+    }
+
+    /**
+     * Provide data for testing encodeData method
+     *
+     * @return array
+     */
+    public function encodeDataNegativeProvider()
+    {
+        return [
+            ['test_string', 'html'],
+            ['test_string', 'jpg']
+        ];
+    }
+
+    /**
+     * Test output
+     *
+     * @dataProvider outputProvider
+     * @param mixed $data
+     * @param string $format
+     * @param string $contentType
+     * @param string $callback     Callback name for testing jsonp request
+     */
+    public function testOutput($data, $format, $contentType, $callback = '')
+    {
+        $controller = $this->getController(['getRequest', 'getResponse']);
+        list($request, $response) = $this->getRequests();        
+
+        if (is_scalar($data)) {
+            $content = $data;
+        } elseif ($format === 'json') {
+            $content = json_encode($data);
+
+            if ($callback) $content = "$callback($content)";                
+        } elseif ($format === 'xml') {
+            $content = $data->asXML();
+        }
+
+        $this->expectOutput($response, $content, $contentType);  
+
+        if ($callback) {
+            $request->method('getQueryParams')->will($this->returnValue(['callback' => $callback]));
+        }      
+
+        $controller->method('getRequest')->will($this->returnValue($request));
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $controller->output($data, $format);
+
+        $this->assertEquals($result, $response, "Output should return response instance");
+    }
+
+    /**
+     * Provide data for testing output
+     *
+     * @return array
+     */
+    public function outputProvider()
+    {
+        $xml = simplexml_load_string(
+            "<?xml version='1.0'?> 
+             <document>
+                 <tag1>Test tag</tag1>
+                 <tag2>Test</tag2>
+            </document>"
+        );
+
+        return [
+            ['test_string', 'text', 'text/plain'],
+            ['javascript:test_call();', 'js', 'application/javascript'],
+            ['test {}', 'css', 'text/css'],
+            ['test_string', 'json', 'application/json'],
+            [['testKey' => 'testValue'], 'json', 'application/json'],
+            [['testKey' => 'testValue'], 'json', 'application/json', 'test_callback'],
+            ['', 'json', 'application/json'],
+            ['', 'json', 'application/json', 'test_callback'],
+            [$xml, 'xml', 'application/xml']
+        ];
+    }
+
+    /**
+     * Test functions that deal with error messages
+     *
+     * @dataProvider errorMessagesProvider
+     * @param string $function
+     * @param int $code 
+     * @param boolean $default   Is code default for this function
+     */
+    public function testErrorMessages($function, $code, $default)
+    {
+        $message = 'Test message';
+        $controller = $this->getController(['getResponse']);
+        list(, $response) = $this->getRequests();        
+
+        $this->expectErrorMessage($response, $message, $code);
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $default ? 
+            $controller->{$function}($message) :
+            $controller->{$function}($message, $code);
+
+        $this->assertEquals($result, $response, "Response object should be returned");
+    }
+
+    /**
+     * Provide data for testing error messages functions
+     *
+     * @return array
+     */
+    public function errorMessagesProvider()
+    {
+        return [
+            ['error', 400, true],
+            ['error', 403, false],
+            ['tooManyRequests', 429, true],
+            ['tooManyRequests', 400, false],
+            ['conflict', 409, true],
+            ['conflict', 403, false],
+            ['notFound', 404, true],
+            ['notFound', 400, false],
+            ['forbidden', 403, true],
+            ['forbidden', 409, false],
+            ['badRequest', 400, true],
+            ['badRequest', 403, false]
+        ];
+    }
+    
+    /**
+     * Test setting flash
+     *
+     * @dataProvider flashProvider
+     * @param object $data 
+     */
+    public function testFlash($data)
+    {
+        $controller = $this->getMockBuilder(Controller::class)->disableOriginalConstructor()->getMockForAbstractClass();
+
+        $flash = $controller->flash();
+        $this->assertInstanceOf(Flash::class, $flash, "Flash is not set");
+        $this->assertEmpty($flash->get(), "Flash data should be empty");        
+
+        $flash = $controller->flash($data->type, $data->message);
+        $this->assertInstanceOf(Flash::class, $flash, "Flash is not set");
+        $this->assertEquals($data, $flash->get(), "Flash data is incorrect");
+
+        $flash = $controller->flash();
+        $this->assertInstanceOf(Flash::class, $flash, "Flash is not set");
+        $this->assertEquals($data, $flash->get(), "Flash data is incorrect");
+
+        $flash->clear();
+    }
+
+    /**
+     * Test setting flash
+     *
+     * @return array
+     */
+    public function flashProvider()
+    {
+        return [
+            [(object)['type' => 'test_type', 'message' => 'Test message']]
+        ];  
+    }
+
+    /**
+     * Test respondWith function
+     *
+     * @dataProvider respondWithProvider
+     * @param int|string $code
+     * @param string $format 
+     * @param int $setCode      Actual code that will be set in response
+     * @param string $contentType 
+     */
+    public function testRespondWith($code, $format, $setCode, $contentType)
+    {
+        $controller = $this->getController(['getResponse']);
+        list(, $response) = $this->getRequests();                
+
+        $this->expectResponseWith($response, $setCode, $contentType);
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $controller->respondWith($code, $format);
+
+        $this->assertEquals($result, $response, "Response object should be returned");
+    }
+
+    /**
+     * Test function respondWith
+     *
+     * @return array
+     */
+    public function respondWithProvider()
+    {
+        return [
+            [200, 'json', 200, 'application/json'],
+            [200, 'application/json', 200, 'application/json'],
+            [204, null, 204, null],
+            ['204 Created', null, 204, null],
+            ['json', null, null, 'application/json']
+        ];  
+    }
+
+    /**
+     * Test functions that are simple wrappers around respondWith function
+     *
+     * @dataProvider respondWithWrappersProvider
+     * @param string $function
+     * @param int $code
+     */
+    public function testResponseWithWrappers($function, $code)
+    {
+        $controller = $this->getController(['getResponse']);
+        list(, $response) = $this->getRequests();                
+
+        $this->expectResponseWith($response, $code);
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $controller->{$function}();
+
+        $this->assertEquals($result, $response, "Response object should be returned");   
+    }
+
+    /**
+     * Provide data for testing respondWith wrappers
+     *
+     * @return array
+     */
+    public function respondWithWrappersProvider()
+    {
+        return [
+            ['ok', 200],
+            ['noContent', 204]
+        ];
+    }
+
+    /**
+     * Test 'created' function
+     *
+     * @dataProvider createdProvider
+     * @param string $location
+     */
+    public function testCreated($location)
+    {
+        $controller = $this->getController(['getResponse']);
+        list(, $response) = $this->getRequests();                
+
+        $response->expects($this->once())->method('withStatus')->with($this->equalTo(201))->will($this->returnSelf());
+        if ($location) {
+            $response->expects($this->once())->method('withHeader')->with($this->equalTo('Location'), $this->equalTo($location))->will($this->returnSelf());
+        }
+
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $controller->created($location);
+
+        $this->assertEquals($result, $response, "Response object should be returned");   
+    }
+
+    /**
+     * Provide data for testing 'created' function
+     *
+     * @return array
+     */
+    public function createdProvider()
+    {
+        return [
+            [''], ['/some-path/test']
+        ];
+    }
+
+    /**
+     * Test 'redirect' function
+     *
+     * @dataProvider redirectProvider
+     * @param string $url 
+     * @param int $code 
+     * @param boolean $default
+     */
+    public function testRedirect($url, $code, $default)
+    {
+        $controller = $this->getController(['getResponse']);
+        list(, $response) = $this->getRequests();                        
+
+        $this->expectRedirect($response, $url, $code);
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $default ? 
+            $controller->redirect($url) :
+            $controller->redirect($url, $code);
+
+        $this->assertEquals($result, $response, "Response object should be returned");   
+    }
+
+    /**
+     * Provide data for testing 'redirect' function
+     *
+     * @return array
+     */
+    public function redirectProvider()
+    {
+        return [
+            ['/test-url', 303, true], 
+            ['/test-url', 301, false]
+        ];
+    }
+
+    /**
+     * Test 'requireLogin' function
+     *
+     * @dataProvider requireLoginProvider
+     * @param string $function
+     */
+    public function testRequireLogin($function)
+    {
+        $controller = $this->getController(['getResponse']);
+        list(, $response) = $this->getRequests();                        
+
+        $this->expectRedirect($response, '/401', 303);
+        $controller->method('getResponse')->will($this->returnValue($response));
+
+        $result = $controller->{$function}();
+
+        $this->assertEquals($result, $response, "Response object should be returned");   
+    }
+
+    /**
+     * Provide data for testing 'requireLogon' function
+     *
+     * @return array
+     */
+    public function requireLoginProvider()
+    {
+        return [
+            ['requireLogin'], ['requireAuth']
+        ];
+    }
+
+    /**
+     * Test 'getLocalReferer' funtion
+     *
+     * @dataProvider localRefererProvider
+     * @param string $referer
+     * @param string $host 
+     * @param boolean $local
+     */
+    public function testLocalReferer($referer, $host, $local)
+    {
+        $controller = $this->getController(['getRequest']);
+        list($request) = $this->getRequests();                        
+
+        $this->expectLocalReferer($request, $referer, $host);
+        $controller->method('getRequest')->will($this->returnValue($request));
+
+        $result = $controller->getLocalReferer();
+
+        $local ?
+            $this->assertEquals($referer, $result, "Local referer should be returned") :      
+            $this->assertEquals('', $result, "Local referer should not be returned");
+    }
+
+    /**
+     * Test 'back' function
+     *
+     * @dataProvider localRefererProvider
+     * @param string $referer
+     * @param string $host 
+     * @param boolean $local
+     */
+    public function testBack($referer, $host, $local)
+    {
+        $controller = $this->getController(['getRequest', 'getResponse']);
+        list($request, $response) = $this->getRequests();        
+
+        $this->expectLocalReferer($request, $referer, $host);
+        $this->expectRedirect($response, $local ? $referer : '/', 303);
+
+        $controller->method('getRequest')->will($this->returnValue($request));
+        $controller->method('getResponse')->will($this->returnValue($response));        
+
+        $result = $controller->back();
+
+        $this->assertEquals($result, $response, "Response object should be returned");   
+    }
+
+    /**
+     * Provide data fot testing 'getLocalReferer' function
+     *
+     * @return array
+     */
+    public function localRefererProvider()
+    {
+        return [
+            ['http://not-local-host.com/path', 'local-host.com', false],
+            ['http://local-host.com/path', 'local-host.com', true]
+        ];  
+    }
+
+    /**
+     * Expect for 'getLocalReferer' function to work correctly
+     *
+     * @param ServerRequestInterface $request
+     * @param string $referer
+     * @param string $host 
+     */
+    public function expectLocalReferer($request, $referer, $host)
+    {
+        $request->expects($this->exactly(2))->method('getHeaderLine')->withConsecutive(
+            [$this->equalTo('HTTP_REFERER')],
+            [$this->equalTo('HTTP_HOST')]
+        )->will($this->returnCallback(function($header) use ($referer, $host) {
+            return $header === 'HTTP_REFERER' ? $referer : $host;
+        }));
+    }
+
+    /**
+     * Expect for redirect
+     *
+     * @param ResponseInterface $response
+     * @param string $url
+     * @param int $code 
+     */
+    public function expectRedirect($response, $url, $code)     
+    {
+        $stream = $this->createMock(StreamInterface::class);
+        $stream->expects($this->once())->method('write')->with($this->equalTo('You are being redirected to <a href="' . $url . '">' . $url . '</a>'));   
+
+        $response->expects($this->once())->method('getBody')->will($this->returnValue($stream));
+        $response->expects($this->once())->method('withStatus')->with($this->equalTo($code))->will($this->returnSelf());
+        $response->expects($this->exactly(2))->method('withHeader')->withConsecutive(
+            [$this->equalTo('Content-Type'), $this->equalTo('text/html')],
+            [$this->equalTo('Location'), $this->equalTo($url)]
+        )->will($this->returnSelf());
+    }
+
+    /**
+     * Expect correct work of respondWith function
+     *
+     * @param ResponseInterface $response
+     * @param int $code
+     * @param string $contentType
+     */
+    public function expectResponseWith($response, $code, $contentType = null)
+    {
+        $code ?
+            $response->expects($this->once())->method('withStatus')->with($this->equalTo($code))->will($this->returnSelf()) :
+            $response->expects($this->never())->method('withStatus')->with($this->equalTo($code));            
+
+        $contentType ?
+            $response->expects($this->once())->method('withHeader')->with($this->equalTo('Content-Type'), $this->equalTo($contentType))->will($this->returnSelf()) :
+            $response->expects($this->never())->method('withHeader')->with($this->equalTo('Content-Type'), $this->equalTo($contentType));
+    }
+
+    /**
+     * Expect for correct work of error message functions
+     *
+     * @param ResponseInterface $response
+     * @param string $message 
+     * @param int $code
+     */
+    public function expectErrorMessage($response, $message, $code)
+    {
+        $stream = $this->createMock(StreamInterface::class);
+        $stream->expects($this->once())->method('write')->with($this->equalTo($message));
+
+        $response->expects($this->once())->method('withStatus')->with($this->equalTo($code))->will($this->returnSelf());
+        $response->expects($this->once())->method('getBody')->will($this->returnValue($stream));
+    }
+
+    /**
+     * Expects that output will be set to content
+     *
+     * @param ResponseInterface $response
+     * @param string $content 
+     * @param string $contentType 
+     */
+    public function expectOutput($response, $content, $contentType)
+    {
+        $stream = $this->createMock(StreamInterface::class);
+        $stream->expects($this->once())->method('write')->with($this->equalTo($content));
+
+        $response->expects($this->once())->method('withHeader')->with($this->equalTo('Content-Type'), $this->equalTo($contentType))->will($this->returnSelf());
+        $response->expects($this->once())->method('getBody')->will($this->returnValue($stream));
+    }
+
+    /**
+     * Get request and response instances
+     *
+     * @return array
+     */
+    public function getRequests()
+    {
+        return [
+            $this->createMock(ServerRequestInterface::class),
+            $this->createMock(ResponseInterface::class)            
+        ];
+    }
+    
+    /**
+     * Get map of status codes to states
+     *
+     * @param int $code
+     * @return []
+     */
+    public function getStatusCodesMap($code)
+    {
+        return [
+            'isSuccessful' => !$code || ($code >= 200 && $code < 300),
+            'isRedirection' => $code >= 300 && $code < 400,
+            'isClientError' => $code >= 400 && $code < 500,
+            'isServerError' => $code >= 500            
+        ];
+    }
+
+    /**
+     * Get map of request methods
+     *
+     * @param string $method
+     * @return array
+     */
+    public function getMethodsMap($method)
+    {
+        return [
+            'isGetRequest' => $method === 'GET',
+            'isPostRequest' => $method === 'POST',
+            'isPutRequest' => $method === 'PUT',
+            'isDeleteRequest' => $method === 'DELETE',
+            'isHeadRequest' => $method === 'HEAD'
+        ];
+    }
+}
diff --git a/tests/View/TwigTest.php b/tests/Controller/View/TwigTest.php
index 662681d..662681d 100644
--- a/tests/View/TwigTest.php
+++ b/tests/Controller/View/TwigTest.php
diff --git a/tests/ControllerTest.php b/tests/ControllerTest.php
index b6a6b2d..3e3b39c 100644
--- a/tests/ControllerTest.php
+++ b/tests/ControllerTest.php
@@ -1,32 +1,19 @@
 <?php
 
+namespace Jasny;
+
 use Jasny\Controller;
-use Jasny\Flash;
 use Psr\Http\Message\ServerRequestInterface;
 use Psr\Http\Message\ResponseInterface;
-use Psr\Http\Message\StreamInterface;
+use Jasny\Controller\TestHelper;
 
 /**
  * @covers Jasny\Controller
  */
-class ControllerTest extends PHPUnit_Framework_TestCase
+class ControllerTest extends \PHPUnit_Framework_TestCase
 {
-    /**
-     * Get mock for controller
-     *
-     * @param array $methods  Methods to mock
-     * @return Controller
-     */
-    public function getController($methods = [])
-    {
-        $builder = $this->getMockBuilder(Controller::class)->disableOriginalConstructor();
-        if ($methods) {
-            $builder->setMethods($methods);
-        }
-
-        return $builder->getMockForAbstractClass();
-    }
-
+    use TestHelper;
+    
     /**
      * Test running controller
      */
@@ -40,7 +27,7 @@ class ControllerTest extends PHPUnit_Framework_TestCase
         $finalResponse = $this->createMock(ResponseInterface::class);
 
         $controller->expects($this->once())->method('run')
-            ->willReturnCallback(Closure::bind(function() use ($test, $request, $response, $finalResponse) {
+            ->willReturnCallback(\Closure::bind(function() use ($test, $request, $response, $finalResponse) {
                 $test->assertSame($request, $this->getRequest());
                 $test->assertSame($response, $this->getResponse());
                 
@@ -51,700 +38,4 @@ class ControllerTest extends PHPUnit_Framework_TestCase
 
         $this->assertEquals($finalResponse, $result);
     }
-
-    /**
-     * Test response status functions if response object is not set
-     */
-    public function testResponseStatusEmptyResponse()
-    {
-        $controller = $this->getController();   
-        $data = $this->getStatusCodesMap(null);
-
-        foreach ($data as $func => $value) {
-            $this->assertEquals($value, $controller->$func(), "Method '$func' returns incorrect value");
-        }
-    }
-
-    /**
-     * Test functions that check response status code
-     *
-     * @dataProvider responseStatusProvider
-     * @param int  status code
-     */
-    public function testResponseStatus($code)
-    {
-        $controller = $this->getController();
-        list($request, $response) = $this->getRequests();
-        $response->method('getStatusCode')->will($this->returnValue($code));
-
-        $controller($request, $response);                
-
-        $data = $this->getStatusCodesMap($code);
-
-        foreach ($data as $func => $value) {
-            $this->assertEquals($value, $controller->$func(), "Method '$func' returns incorrect value");
-        }
-
-        $this->assertEquals($data['isClientError'] || $data['isServerError'], $controller->isError()
-            , "Method 'isError' returns incorrect value");
-    }
-
-    /**
-     * Provide data for testing status methods
-     *
-     * @return array
-     */
-    public function responseStatusProvider()
-    {
-        return [
-            [null], [199],
-            [200], [201], [299],
-            [300], [304], [399],
-            [400], [403], [499],
-            [500], [503]
-        ];
-    }
-
-    /**
-     * Test functions that check request method
-     *
-     * @dataProvider requestMethodProvider
-     * @param string $method
-     */
-    public function testRequestMethod($method)
-    {
-        $controller = $this->getController();
-        list($request, $response) = $this->getRequests();
-        $request->method('getMethod')->will($this->returnValue($method));
-
-        $controller($request, $response);                
-
-        $data = $this->getMethodsMap($method);
-
-        foreach ($data as $func => $value) {
-            $this->assertEquals($value, $controller->$func(), "Method '$func' returns incorrect value");
-        }
-    }
-
-    /**
-     * Provide data for testing functions that determine request method
-     *
-     * @return array
-     */
-    public function requestMethodProvider()
-    {
-        return [
-            ['GET'], ['POST'], ['PUT'], ['DELETE'], ['HEAD']
-        ];
-    }
-    
-    /**
-     * Test encodeData method, positive tests
-     *
-     * @dataProvider encodeDataPositiveProvider
-     * @param mixed $data
-     * @param string $format 
-     * @param string $callback  Callback name for testing jsonp request
-     */
-    public function testEncodeDataPositive($data, $format, $callback = null)
-    {
-        $this->markTestSkipped();
-        
-        $controller = $this->getController(['getRequest']);
-        list($request) = $this->getRequests();
-
-        if ($callback) {
-            $request->method('getQueryParams')->will($this->returnValue(['callback' => $callback]));
-        }
-
-        $controller->method('getRequest')->will($this->returnValue($request));
-
-        $result = $controller->encodeData($data, $format);
-        $expect = null;
-
-        if ($format === 'json') {
-            $expect = json_encode($data);
-
-            if ($callback) $expect = "$callback($expect)";                
-        } else {
-            $expect = $data->asXML();
-        }
-
-        $this->assertNotEmpty($result, "Result should not be empty");
-        $this->assertEquals($expect, $result, "Data was not encoded correctly");
-    }
-
-    /**
-     * Provide data for testing encodeData method
-     *
-     * @return array
-     */
-    public function encodeDataPositiveProvider()
-    {
-        $xml = simplexml_load_string(
-            "<?xml version='1.0'?> 
-             <document>
-                 <tag1>Test tag</tag1>
-                 <tag2>Test</tag2>
-            </document>"
-        );
-
-        return [
-            ['test_string', 'json'],
-            [['testKey' => 'testValue'], 'json'],
-            [['testKey' => 'testValue'], 'json', 'test_callback'],
-            ['', 'json'],
-            ['', 'json', 'test_callback'],
-            [$xml, 'xml']
-        ];
-    }
-
-    /**
-     * Test encodeData method, negative tests
-     *
-     * @dataProvider encodeDataNegativeProvider
-     * @param mixed $data
-     * @param string $format
-     */
-    public function testEncodeDataNegative($data, $format)
-    {
-        $this->markTestSkipped();
-        
-        $controller = $this->getController(['getRequest']);
-        list($request) = $this->getRequests();
-
-        $controller->method('getRequest')->will($this->returnValue($request));
-        $this->expectException(\InvalidArgumentException::class);
-
-        $result = $controller->encodeData($data, $format);
-    }
-
-    /**
-     * Provide data for testing encodeData method
-     *
-     * @return array
-     */
-    public function encodeDataNegativeProvider()
-    {
-        return [
-            ['test_string', 'html'],
-            ['test_string', 'jpg']
-        ];
-    }
-
-    /**
-     * Test output
-     *
-     * @dataProvider outputProvider
-     * @param mixed $data
-     * @param string $format
-     * @param string $contentType
-     * @param string $callback     Callback name for testing jsonp request
-     */
-    public function testOutput($data, $format, $contentType, $callback = '')
-    {
-        $controller = $this->getController(['getRequest', 'getResponse']);
-        list($request, $response) = $this->getRequests();        
-
-        if (is_scalar($data)) {
-            $content = $data;
-        } elseif ($format === 'json') {
-            $content = json_encode($data);
-
-            if ($callback) $content = "$callback($content)";                
-        } elseif ($format === 'xml') {
-            $content = $data->asXML();
-        }
-
-        $this->expectOutput($response, $content, $contentType);  
-
-        if ($callback) {
-            $request->method('getQueryParams')->will($this->returnValue(['callback' => $callback]));
-        }      
-
-        $controller->method('getRequest')->will($this->returnValue($request));
-        $controller->method('getResponse')->will($this->returnValue($response));
-
-        $result = $controller->output($data, $format);
-
-        $this->assertEquals($result, $response, "Output should return response instance");
-    }
-
-    /**
-     * Provide data for testing output
-     *
-     * @return array
-     */
-    public function outputProvider()
-    {
-        $xml = simplexml_load_string(
-            "<?xml version='1.0'?> 
-             <document>
-                 <tag1>Test tag</tag1>
-                 <tag2>Test</tag2>
-            </document>"
-        );
-
-        return [
-            ['test_string', 'text', 'text/plain'],
-            ['javascript:test_call();', 'js', 'application/javascript'],
-            ['test {}', 'css', 'text/css'],
-            ['test_string', 'json', 'application/json'],
-            [['testKey' => 'testValue'], 'json', 'application/json'],
-            [['testKey' => 'testValue'], 'json', 'application/json', 'test_callback'],
-            ['', 'json', 'application/json'],
-            ['', 'json', 'application/json', 'test_callback'],
-            [$xml, 'xml', 'application/xml']
-        ];
-    }
-
-    /**
-     * Test functions that deal with error messages
-     *
-     * @dataProvider errorMessagesProvider
-     * @param string $function
-     * @param int $code 
-     * @param boolean $default   Is code default for this function
-     */
-    public function testErrorMessages($function, $code, $default)
-    {
-        $message = 'Test message';
-        $controller = $this->getController(['getResponse']);
-        list(, $response) = $this->getRequests();        
-
-        $this->expectErrorMessage($response, $message, $code);
-        $controller->method('getResponse')->will($this->returnValue($response));
-
-        $result = $default ? 
-            $controller->{$function}($message) :
-            $controller->{$function}($message, $code);
-
-        $this->assertEquals($result, $response, "Response object should be returned");
-    }
-
-    /**
-     * Provide data for testing error messages functions
-     *
-     * @return array
-     */
-    public function errorMessagesProvider()
-    {
-        return [
-            ['error', 400, true],
-            ['error', 403, false],
-            ['tooManyRequests', 429, true],
-            ['tooManyRequests', 400, false],
-            ['conflict', 409, true],
-            ['conflict', 403, false],
-            ['notFound', 404, true],
-            ['notFound', 400, false],
-            ['forbidden', 403, true],
-            ['forbidden', 409, false],
-            ['badRequest', 400, true],
-            ['badRequest', 403, false]
-        ];
-    }
-    
-    /**
-     * Test setting flash
-     *
-     * @dataProvider flashProvider
-     * @param object $data 
-     */
-    public function testFlash($data)
-    {
-        $controller = $this->getMockBuilder(Controller::class)->disableOriginalConstructor()->getMockForAbstractClass();
-
-        $flash = $controller->flash();
-        $this->assertInstanceOf(Flash::class, $flash, "Flash is not set");
-        $this->assertEmpty($flash->get(), "Flash data should be empty");        
-
-        $flash = $controller->flash($data->type, $data->message);
-        $this->assertInstanceOf(Flash::class, $flash, "Flash is not set");
-        $this->assertEquals($data, $flash->get(), "Flash data is incorrect");
-
-        $flash = $controller->flash();
-        $this->assertInstanceOf(Flash::class, $flash, "Flash is not set");
-        $this->assertEquals($data, $flash->get(), "Flash data is incorrect");
-
-        $flash->clear();
-    }
-
-    /**
-     * Test setting flash
-     *
-     * @return array
-     */
-    public function flashProvider()
-    {
-        return [
-            [(object)['type' => 'test_type', 'message' => 'Test message']]
-        ];  
-    }
-
-    /**
-     * Test respondWith function
-     *
-     * @dataProvider respondWithProvider
-     * @param int|string $code
-     * @param string $format 
-     * @param int $setCode      Actual code that will be set in response
-     * @param string $contentType 
-     */
-    public function testRespondWith($code, $format, $setCode, $contentType)
-    {
-        $controller = $this->getController(['getResponse']);
-        list(, $response) = $this->getRequests();                
-
-        $this->expectResponseWith($response, $setCode, $contentType);
-        $controller->method('getResponse')->will($this->returnValue($response));
-
-        $result = $controller->respondWith($code, $format);
-
-        $this->assertEquals($result, $response, "Response object should be returned");
-    }
-
-    /**
-     * Test function respondWith
-     *
-     * @return array
-     */
-    public function respondWithProvider()
-    {
-        return [
-            [200, 'json', 200, 'application/json'],
-            [200, 'application/json', 200, 'application/json'],
-            [204, null, 204, null],
-            ['204 Created', null, 204, null],
-            ['json', null, null, 'application/json']
-        ];  
-    }
-
-    /**
-     * Test functions that are simple wrappers around respondWith function
-     *
-     * @dataProvider respondWithWrappersProvider
-     * @param string $function
-     * @param int $code
-     */
-    public function testResponseWithWrappers($function, $code)
-    {
-        $controller = $this->getController(['getResponse']);
-        list(, $response) = $this->getRequests();                
-
-        $this->expectResponseWith($response, $code);
-        $controller->method('getResponse')->will($this->returnValue($response));
-
-        $result = $controller->{$function}();
-
-        $this->assertEquals($result, $response, "Response object should be returned");   
-    }
-
-    /**
-     * Provide data for testing respondWith wrappers
-     *
-     * @return array
-     */
-    public function respondWithWrappersProvider()
-    {
-        return [
-            ['ok', 200],
-            ['noContent', 204]
-        ];
-    }
-
-    /**
-     * Test 'created' function
-     *
-     * @dataProvider createdProvider
-     * @param string $location
-     */
-    public function testCreated($location)
-    {
-        $controller = $this->getController(['getResponse']);
-        list(, $response) = $this->getRequests();                
-
-        $response->expects($this->once())->method('withStatus')->with($this->equalTo(201))->will($this->returnSelf());
-        if ($location) {
-            $response->expects($this->once())->method('withHeader')->with($this->equalTo('Location'), $this->equalTo($location))->will($this->returnSelf());
-        }
-
-        $controller->method('getResponse')->will($this->returnValue($response));
-
-        $result = $controller->created($location);
-
-        $this->assertEquals($result, $response, "Response object should be returned");   
-    }
-
-    /**
-     * Provide data for testing 'created' function
-     *
-     * @return array
-     */
-    public function createdProvider()
-    {
-        return [
-            [''], ['/some-path/test']
-        ];
-    }
-
-    /**
-     * Test 'redirect' function
-     *
-     * @dataProvider redirectProvider
-     * @param string $url 
-     * @param int $code 
-     * @param boolean $default
-     */
-    public function testRedirect($url, $code, $default)
-    {
-        $controller = $this->getController(['getResponse']);
-        list(, $response) = $this->getRequests();                        
-
-        $this->expectRedirect($response, $url, $code);
-        $controller->method('getResponse')->will($this->returnValue($response));
-
-        $result = $default ? 
-            $controller->redirect($url) :
-            $controller->redirect($url, $code);
-
-        $this->assertEquals($result, $response, "Response object should be returned");   
-    }
-
-    /**
-     * Provide data for testing 'redirect' function
-     *
-     * @return array
-     */
-    public function redirectProvider()
-    {
-        return [
-            ['/test-url', 303, true], 
-            ['/test-url', 301, false]
-        ];
-    }
-
-    /**
-     * Test 'requireLogin' function
-     *
-     * @dataProvider requireLoginProvider
-     * @param string $function
-     */
-    public function testRequireLogin($function)
-    {
-        $controller = $this->getController(['getResponse']);
-        list(, $response) = $this->getRequests();                        
-
-        $this->expectRedirect($response, '/401', 303);
-        $controller->method('getResponse')->will($this->returnValue($response));
-
-        $result = $controller->{$function}();
-
-        $this->assertEquals($result, $response, "Response object should be returned");   
-    }
-
-    /**
-     * Provide data for testing 'requireLogon' function
-     *
-     * @return array
-     */
-    public function requireLoginProvider()
-    {
-        return [
-            ['requireLogin'], ['requireAuth']
-        ];
-    }
-
-    /**
-     * Test 'getLocalReferer' funtion
-     *
-     * @dataProvider localRefererProvider
-     * @param string $referer
-     * @param string $host 
-     * @param boolean $local
-     */
-    public function testLocalReferer($referer, $host, $local)
-    {
-        $controller = $this->getController(['getRequest']);
-        list($request) = $this->getRequests();                        
-
-        $this->expectLocalReferer($request, $referer, $host);
-        $controller->method('getRequest')->will($this->returnValue($request));
-
-        $result = $controller->getLocalReferer();
-
-        $local ?
-            $this->assertEquals($referer, $result, "Local referer should be returned") :      
-            $this->assertEquals('', $result, "Local referer should not be returned");
-    }
-
-    /**
-     * Test 'back' function
-     *
-     * @dataProvider localRefererProvider
-     * @param string $referer
-     * @param string $host 
-     * @param boolean $local
-     */
-    public function testBack($referer, $host, $local)
-    {
-        $controller = $this->getController(['getRequest', 'getResponse']);
-        list($request, $response) = $this->getRequests();        
-
-        $this->expectLocalReferer($request, $referer, $host);
-        $this->expectRedirect($response, $local ? $referer : '/', 303);
-
-        $controller->method('getRequest')->will($this->returnValue($request));
-        $controller->method('getResponse')->will($this->returnValue($response));        
-
-        $result = $controller->back();
-
-        $this->assertEquals($result, $response, "Response object should be returned");   
-    }
-
-    /**
-     * Provide data fot testing 'getLocalReferer' function
-     *
-     * @return array
-     */
-    public function localRefererProvider()
-    {
-        return [
-            ['http://not-local-host.com/path', 'local-host.com', false],
-            ['http://local-host.com/path', 'local-host.com', true]
-        ];  
-    }
-
-    /**
-     * Expect for 'getLocalReferer' function to work correctly
-     *
-     * @param ServerRequestInterface $request
-     * @param string $referer
-     * @param string $host 
-     */
-    public function expectLocalReferer($request, $referer, $host)
-    {
-        $request->expects($this->exactly(2))->method('getHeaderLine')->withConsecutive(
-            [$this->equalTo('HTTP_REFERER')],
-            [$this->equalTo('HTTP_HOST')]
-        )->will($this->returnCallback(function($header) use ($referer, $host) {
-            return $header === 'HTTP_REFERER' ? $referer : $host;
-        }));
-    }
-
-    /**
-     * Expect for redirect
-     *
-     * @param ResponseInterface $response
-     * @param string $url
-     * @param int $code 
-     */
-    public function expectRedirect($response, $url, $code)     
-    {
-        $stream = $this->createMock(StreamInterface::class);
-        $stream->expects($this->once())->method('write')->with($this->equalTo('You are being redirected to <a href="' . $url . '">' . $url . '</a>'));   
-
-        $response->expects($this->once())->method('getBody')->will($this->returnValue($stream));
-        $response->expects($this->once())->method('withStatus')->with($this->equalTo($code))->will($this->returnSelf());
-        $response->expects($this->exactly(2))->method('withHeader')->withConsecutive(
-            [$this->equalTo('Content-Type'), $this->equalTo('text/html')],
-            [$this->equalTo('Location'), $this->equalTo($url)]
-        )->will($this->returnSelf());
-    }
-
-    /**
-     * Expect correct work of respondWith function
-     *
-     * @param ResponseInterface $response
-     * @param int $code
-     * @param string $contentType
-     */
-    public function expectResponseWith($response, $code, $contentType = null)
-    {
-        $code ?
-            $response->expects($this->once())->method('withStatus')->with($this->equalTo($code))->will($this->returnSelf()) :
-            $response->expects($this->never())->method('withStatus')->with($this->equalTo($code));            
-
-        $contentType ?
-            $response->expects($this->once())->method('withHeader')->with($this->equalTo('Content-Type'), $this->equalTo($contentType))->will($this->returnSelf()) :
-            $response->expects($this->never())->method('withHeader')->with($this->equalTo('Content-Type'), $this->equalTo($contentType));
-    }
-
-    /**
-     * Expect for correct work of error message functions
-     *
-     * @param ResponseInterface $response
-     * @param string $message 
-     * @param int $code
-     */
-    public function expectErrorMessage($response, $message, $code)
-    {
-        $stream = $this->createMock(StreamInterface::class);
-        $stream->expects($this->once())->method('write')->with($this->equalTo($message));
-
-        $response->expects($this->once())->method('withStatus')->with($this->equalTo($code))->will($this->returnSelf());
-        $response->expects($this->once())->method('getBody')->will($this->returnValue($stream));
-    }
-
-    /**
-     * Expects that output will be set to content
-     *
-     * @param ResponseInterface $response
-     * @param string $content 
-     * @param string $contentType 
-     */
-    public function expectOutput($response, $content, $contentType)
-    {
-        $stream = $this->createMock(StreamInterface::class);
-        $stream->expects($this->once())->method('write')->with($this->equalTo($content));
-
-        $response->expects($this->once())->method('withHeader')->with($this->equalTo('Content-Type'), $this->equalTo($contentType))->will($this->returnSelf());
-        $response->expects($this->once())->method('getBody')->will($this->returnValue($stream));
-    }
-
-    /**
-     * Get request and response instances
-     *
-     * @return array
-     */
-    public function getRequests()
-    {
-        return [
-            $this->createMock(ServerRequestInterface::class),
-            $this->createMock(ResponseInterface::class)            
-        ];
-    }
-    
-    /**
-     * Get map of status codes to states
-     *
-     * @param int $code
-     * @return []
-     */
-    public function getStatusCodesMap($code)
-    {
-        return [
-            'isSuccessful' => !$code || ($code >= 200 && $code < 300),
-            'isRedirection' => $code >= 300 && $code < 400,
-            'isClientError' => $code >= 400 && $code < 500,
-            'isServerError' => $code >= 500            
-        ];
-    }
-
-    /**
-     * Get map of request methods
-     *
-     * @param string $method
-     * @return array
-     */
-    public function getMethodsMap($method)
-    {
-        return [
-            'isGetRequest' => $method === 'GET',
-            'isPostRequest' => $method === 'POST',
-            'isPutRequest' => $method === 'PUT',
-            'isDeleteRequest' => $method === 'DELETE',
-            'isHeadRequest' => $method === 'HEAD'
-        ];
-    }
 }
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
new file mode 100644
index 0000000..7648e13
--- /dev/null
+++ b/tests/bootstrap.php
@@ -0,0 +1,4 @@
+<?php
+
+$loader = require __DIR__ . '/../vendor/autoload.php';
+$loader->addPsr4('Jasny\\Controller\\', __DIR__ . '/support');
diff --git a/tests/support/RouteActionController.php b/tests/support/RouteActionController.php
new file mode 100644
index 0000000..66625a9
--- /dev/null
+++ b/tests/support/RouteActionController.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace Jasny\Controller;
+
+use Jasny\Controller;
+
+/**
+ * Class for testing 'RouteAction' trait
+ */
+class RouteActionController extends Controller
+{
+    use Controller\RouteAction;
+}
diff --git a/tests/support/SessionController.php b/tests/support/SessionController.php
new file mode 100644
index 0000000..6758419
--- /dev/null
+++ b/tests/support/SessionController.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace Jasny\Controller;
+
+use Jasny\Controller;
+
+/**
+ * Class for testing 'Session' trait
+ */
+abstract class SessionController extends Controller
+{
+    use Controller\Session;
+}
diff --git a/tests/support/TestController.php b/tests/support/TestController.php
deleted file mode 100644
index e0bdb7b..0000000
--- a/tests/support/TestController.php
+++ /dev/null
@@ -1,50 +0,0 @@
-<?php
-
-use Jasny\Controller;
-use Jasny\Controller\RouteAction;
-use Psr\Http\Message\ServerRequestInterface;
-use Psr\Http\Message\ResponseInterface;
-
-/**
- * Class for testing 'RouteAction' trait
- */
-class TestController extends Controller
-{
-    use RouteAction;
-
-    /**
-     * Test action for executing router
-     *
-     * @param mixed $param1
-     * @param mixed $param2
-     * @return ResponseInterface
-     */
-    public function testRunAction($param1, $param2 = 'defaultValue')
-    {
-        $response = $this->getResponse();
-
-        $response->actionCalled = true;
-        $response->param1 = $param1;
-        $response->param2 = $param2;
-
-        return $response;
-    }
-
-    /**
-     * Test action for executing router
-     *
-     * @param mixed $param1
-     * @param mixed $param2
-     * @return ResponseInterface
-     */
-    public function defaultAction($param1, $param2 = 'defaultValue')
-    {
-        $response = $this->getResponse();
-
-        $response->defaultActionCalled = true;
-        $response->param1 = $param1;
-        $response->param2 = $param2;
-
-        return $response;
-    }
-}
diff --git a/tests/support/TestHelper.php b/tests/support/TestHelper.php
new file mode 100644
index 0000000..01347f4
--- /dev/null
+++ b/tests/support/TestHelper.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Jasny\Controller;
+
+use Jasny\Controller;
+
+/**
+ * Additional test methods
+ */
+trait TestHelper
+{
+    /**
+     * Get mock for controller
+     *
+     * @param array $methods  Methods to mock
+     * @return Controller|\PHPUnit_Framework_MockObject_MockObject
+     */
+    public function getController($methods = [])
+    {
+        $builder = $this->getMockBuilder(Controller::class)->disableOriginalConstructor();
+        if ($methods) {
+            $builder->setMethods($methods);
+        }
+
+        return $builder->getMockForAbstractClass();
+    }
+}