<?php
declare(strict_types=1);

/**
 * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 * @link          https://cakephp.org CakePHP(tm) Project
 * @since         2.0.0
 * @license       https://opensource.org/licenses/mit-license.php MIT License
 */
namespace Cake\Test\TestCase\Http;

use BadMethodCallException;
use Cake\Core\Configure;
use Cake\Http\Cookie\Cookie;
use Cake\Http\Cookie\CookieCollection;
use Cake\Http\Exception\MethodNotAllowedException;
use Cake\Http\FlashMessage;
use Cake\Http\ServerRequest;
use Cake\Http\Session;
use Cake\TestSuite\TestCase;
use InvalidArgumentException;
use Laminas\Diactoros\UploadedFile;
use Laminas\Diactoros\Uri;

/**
 * ServerRequest Test
 */
class ServerRequestTest extends TestCase
{
    /**
     * Test custom detector with extra arguments.
     */
    public function testCustomArgsDetector(): void
    {
        $request = new ServerRequest();
        $request->addDetector('controller', function ($request, $name) {
            return $request->getParam('controller') === $name;
        });

        $request = $request->withParam('controller', 'cake');
        $this->assertTrue($request->is('controller', 'cake'));
        $this->assertFalse($request->is('controller', 'nonExistingController'));
        $this->assertTrue($request->isController('cake'));
        $this->assertFalse($request->isController('nonExistingController'));
    }

    /**
     * Test the header detector.
     */
    public function testHeaderDetector(): void
    {
        $request = new ServerRequest();
        $request->addDetector('host', ['header' => ['host' => 'cakephp.org']]);

        $request = $request->withEnv('HTTP_HOST', 'cakephp.org');
        $this->assertTrue($request->is('host'));

        $request = $request->withEnv('HTTP_HOST', 'php.net');
        $this->assertFalse($request->is('host'));
    }

    /**
     * Test the accept header detector.
     */
    public function testExtensionDetector(): void
    {
        $request = new ServerRequest();
        $request = $request->withParam('_ext', 'json');
        $this->assertTrue($request->is('json'));

        $request = new ServerRequest();
        $request = $request->withParam('_ext', 'xml');
        $this->assertFalse($request->is('json'));
    }

    /**
     * Test the accept header detector.
     */
    public function testAcceptHeaderDetector(): void
    {
        $request = new ServerRequest();
        $request = $request->withEnv('HTTP_ACCEPT', 'application/json, text/plain, */*');
        $this->assertTrue($request->is('json'));

        $request = new ServerRequest();
        $request = $request->withEnv('HTTP_ACCEPT', 'text/plain, */*');
        $this->assertFalse($request->is('json'));

        $request = new ServerRequest();
        $request = $request->withEnv('HTTP_ACCEPT', 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8');
        $this->assertFalse($request->is('json'));
        $this->assertFalse($request->is('xml'));
        $this->assertFalse($request->is('xml'));
    }

    public function testConstructor(): void
    {
        $request = new ServerRequest();
        $this->assertInstanceOf(FlashMessage::class, $request->getAttribute('flash'));
    }

    /**
     * Test construction with query data
     */
    public function testConstructionQueryData(): void
    {
        $data = [
            'query' => [
                'one' => 'param',
                'two' => 'banana',
            ],
            'url' => 'some/path',
        ];
        $request = new ServerRequest($data);
        $this->assertSame('param', $request->getQuery('one'));
        $this->assertEquals($data['query'], $request->getQueryParams());
        $this->assertSame('/some/path', $request->getRequestTarget());
    }

    /**
     * Test constructing with a string url.
     */
    public function testConstructStringUrlIgnoreServer(): void
    {
        $request = new ServerRequest([
            'url' => '/articles/view/1',
            'environment' => ['REQUEST_URI' => '/some/other/path'],
        ]);
        $this->assertSame('/articles/view/1', $request->getUri()->getPath());

        $request = new ServerRequest(['url' => '/']);
        $this->assertSame('/', $request->getUri()->getPath());
    }

    /**
     * Test that querystring args provided in the URL string are parsed.
     */
    public function testQueryStringParsingFromInputUrl(): void
    {
        $request = new ServerRequest(['url' => 'some/path?one=something&two=else']);
        $expected = ['one' => 'something', 'two' => 'else'];
        $this->assertEquals($expected, $request->getQueryParams());
        $this->assertSame('/some/path', $request->getUri()->getPath());
        $this->assertSame('one=something&two=else', $request->getUri()->getQuery());
    }

    /**
     * Test that querystrings are handled correctly.
     */
    public function testQueryStringAndNamedParams(): void
    {
        $config = ['environment' => ['REQUEST_URI' => '/tasks/index?ts=123456']];
        $request = new ServerRequest($config);
        $this->assertSame('/tasks/index', $request->getRequestTarget());

        $config = ['environment' => ['REQUEST_URI' => '/some/path?url=http://cakephp.org']];
        $request = new ServerRequest($config);
        $this->assertSame('/some/path', $request->getRequestTarget());

        $config = ['environment' => [
            'REQUEST_URI' => Configure::read('App.fullBaseUrl') . '/other/path?url=http://cakephp.org',
        ]];
        $request = new ServerRequest($config);
        $this->assertSame('/other/path', $request->getRequestTarget());
    }

    /**
     * Test that URL in path is handled correctly.
     */
    public function testUrlInPath(): void
    {
        $config = ['environment' => ['REQUEST_URI' => '/jump/http://cakephp.org']];
        $request = new ServerRequest($config);
        $this->assertSame('/jump/http://cakephp.org', $request->getRequestTarget());

        $config = ['environment' => [
            'REQUEST_URI' => Configure::read('App.fullBaseUrl') . '/jump/http://cakephp.org',
        ]];
        $request = new ServerRequest($config);
        $this->assertSame('/jump/http://cakephp.org', $request->getRequestTarget());
    }

    /**
     * Test getPath().
     */
    public function testGetPath(): void
    {
        $request = new ServerRequest(['url' => '']);
        $this->assertSame('/', $request->getPath());

        $request = new ServerRequest(['url' => 'some/path?one=something&two=else']);
        $this->assertSame('/some/path', $request->getPath());

        $request = $request->withRequestTarget('/foo/bar?x=y');
        $this->assertSame('/foo/bar', $request->getPath());
    }

    /**
     * Test parsing POST data into the object.
     */
    public function testPostParsing(): void
    {
        $post = [
            'Article' => ['title'],
        ];
        $request = new ServerRequest(compact('post'));
        $this->assertEquals($post, $request->getData());

        $post = ['one' => 1, 'two' => 'three'];
        $request = new ServerRequest(compact('post'));
        $this->assertEquals($post, $request->getData());

        $post = [
            'Article' => ['title' => 'Testing'],
            'action' => 'update',
        ];
        $request = new ServerRequest(compact('post'));
        $this->assertEquals($post, $request->getData());
    }

    /**
     * Test that the constructor uses uploaded file objects
     * if they are present. This could happen in test scenarios.
     */
    public function testFilesObject(): void
    {
        $file = new UploadedFile(
            __FILE__,
            123,
            UPLOAD_ERR_OK,
            'test.php',
            'text/plain'
        );
        $request = new ServerRequest(['files' => ['avatar' => $file]]);
        $this->assertSame(['avatar' => $file], $request->getUploadedFiles());
    }

    /**
     * Test passing an empty files list.
     */
    public function testFilesWithEmptyList(): void
    {
        $request = new ServerRequest([
            'files' => [],
        ]);

        $this->assertEmpty($request->getData());
        $this->assertEmpty($request->getUploadedFiles());
    }

    /**
     * Test replacing files.
     */
    public function testWithUploadedFiles(): void
    {
        $file = new UploadedFile(
            __FILE__,
            123,
            UPLOAD_ERR_OK,
            'test.php',
            'text/plain'
        );
        $request = new ServerRequest();
        $new = $request->withUploadedFiles(['picture' => $file]);

        $this->assertSame([], $request->getUploadedFiles());
        $this->assertNotSame($new, $request);
        $this->assertSame(['picture' => $file], $new->getUploadedFiles());
    }

    /**
     * Test getting a single file
     */
    public function testGetUploadedFile(): void
    {
        $file = new UploadedFile(
            __FILE__,
            123,
            UPLOAD_ERR_OK,
            'test.php',
            'text/plain'
        );
        $request = new ServerRequest();
        $new = $request->withUploadedFiles(['picture' => $file]);
        $this->assertNull($new->getUploadedFile(''));
        $this->assertSame($file, $new->getUploadedFile('picture'));

        $new = $request->withUploadedFiles([
            'pictures' => [
                [
                    'image' => $file,
                ],
            ],
        ]);
        $this->assertNull($new->getUploadedFile('pictures'));
        $this->assertNull($new->getUploadedFile('pictures.0'));
        $this->assertNull($new->getUploadedFile('pictures.1'));
        $this->assertSame($file, $new->getUploadedFile('pictures.0.image'));
    }

    /**
     * Test replacing files with an invalid file
     */
    public function testWithUploadedFilesInvalidFile(): void
    {
        $this->expectException(InvalidArgumentException::class);
        $this->expectExceptionMessage('Invalid file at `avatar`');
        $request = new ServerRequest();
        $request->withUploadedFiles(['avatar' => 'not a file']);
    }

    /**
     * Test replacing files with an invalid file
     */
    public function testWithUploadedFilesInvalidFileNested(): void
    {
        $this->expectException(InvalidArgumentException::class);
        $this->expectExceptionMessage('Invalid file at `user.avatar`');
        $request = new ServerRequest();
        $request->withUploadedFiles(['user' => ['avatar' => 'not a file']]);
    }

    /**
     * Test the clientIp method.
     */
    public function testClientIp(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_X_FORWARDED_FOR' => '192.168.1.5, 10.0.1.1, proxy.com, real.ip',
            'HTTP_X_REAL_IP' => '192.168.1.1',
            'HTTP_CLIENT_IP' => '192.168.1.2',
            'REMOTE_ADDR' => '192.168.1.3',
        ]]);

        $request->trustProxy = true;
        $this->assertSame('real.ip', $request->clientIp());

        $request = $request->withEnv('HTTP_X_FORWARDED_FOR', '');
        $this->assertSame('192.168.1.1', $request->clientIp());

        $request = $request->withEnv('HTTP_X_REAL_IP', '');
        $this->assertSame('192.168.1.2', $request->clientIp());

        $request->trustProxy = false;
        $this->assertSame('192.168.1.3', $request->clientIp());

        $request = $request->withEnv('HTTP_X_FORWARDED_FOR', '');
        $this->assertSame('192.168.1.3', $request->clientIp());

        $request = $request->withEnv('HTTP_CLIENT_IP', '');
        $this->assertSame('192.168.1.3', $request->clientIp());
    }

    /**
     * test clientIp method with trusted proxies
     */
    public function testClientIpWithTrustedProxies(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_X_FORWARDED_FOR' => 'real.ip, 192.168.1.0, 192.168.1.2, 192.168.1.3',
            'HTTP_X_REAL_IP' => '192.168.1.1',
            'HTTP_CLIENT_IP' => '192.168.1.2',
            'REMOTE_ADDR' => '192.168.1.4',
        ]]);

        $request->setTrustedProxies([
            '192.168.1.0',
            '192.168.1.1',
            '192.168.1.2',
            '192.168.1.3',
        ]);

        $this->assertSame('real.ip', $request->clientIp());

        $request = $request->withEnv(
            'HTTP_X_FORWARDED_FOR',
            'spoof.fake.ip, real.ip, 192.168.1.0, 192.168.1.2, 192.168.1.3'
        );
        $this->assertSame('192.168.1.3', $request->clientIp());

        $request = $request->withEnv('HTTP_X_FORWARDED_FOR', '');
        $this->assertSame('192.168.1.1', $request->clientIp());

        $request->trustProxy = false;
        $this->assertSame('192.168.1.4', $request->clientIp());
    }

    /**
     * Test the referrer function.
     */
    public function testReferer(): void
    {
        $request = new ServerRequest(['webroot' => '/']);

        $request = $request->withEnv('HTTP_REFERER', 'http://cakephp.org');
        $result = $request->referer(false);
        $this->assertSame('http://cakephp.org', $result);

        $request = $request->withEnv('HTTP_REFERER', '');
        $result = $request->referer(true);
        $this->assertNull($result);

        $result = $request->referer(false);
        $this->assertNull($result);

        $request = $request->withEnv('HTTP_REFERER', Configure::read('App.fullBaseUrl') . '/some/path');
        $result = $request->referer();
        $this->assertSame('/some/path', $result);

        $request = $request->withEnv('HTTP_REFERER', Configure::read('App.fullBaseUrl') . '///cakephp.org/');
        $result = $request->referer();
        $this->assertSame('/', $result); // Avoid returning scheme-relative URLs.

        $request = $request->withEnv('HTTP_REFERER', Configure::read('App.fullBaseUrl') . '/0');
        $result = $request->referer();
        $this->assertSame('/0', $result);

        $request = $request->withEnv('HTTP_REFERER', Configure::read('App.fullBaseUrl') . '/');
        $result = $request->referer();
        $this->assertSame('/', $result);

        $request = $request->withEnv('HTTP_REFERER', Configure::read('App.fullBaseUrl') . '/some/path');
        $result = $request->referer(false);
        $this->assertSame(Configure::read('App.fullBaseUrl') . '/some/path', $result);
    }

    /**
     * Test referer() with a base path that duplicates the
     * first segment.
     */
    public function testRefererBasePath(): void
    {
        $request = new ServerRequest([
            'url' => '/waves/users/login',
            'webroot' => '/waves/',
            'base' => '/waves',
        ]);
        $request = $request->withEnv('HTTP_REFERER', Configure::read('App.fullBaseUrl') . '/waves/waves/add');

        $result = $request->referer();
        $this->assertSame('/waves/add', $result);
    }

    /**
     * test the simple uses of is()
     */
    public function testIsHttpMethods(): void
    {
        $request = new ServerRequest();

        $request = $request->withEnv('REQUEST_METHOD', 'GET');
        $this->assertTrue($request->is('get'));

        $request = $request->withEnv('REQUEST_METHOD', 'POST');
        $this->assertTrue($request->is('POST'));

        $request = $request->withEnv('REQUEST_METHOD', 'PUT');
        $this->assertTrue($request->is('put'));
        $this->assertFalse($request->is('get'));

        $request = $request->withEnv('REQUEST_METHOD', 'DELETE');
        $this->assertTrue($request->is('delete'));
        $this->assertTrue($request->isDelete());

        $request = $request->withEnv('REQUEST_METHOD', 'delete');
        $this->assertFalse($request->is('delete'));
    }

    public function testExceptionForInvalidType()
    {
        $this->expectException(InvalidArgumentException::class);
        $this->expectExceptionMessage('No detector set for type `nonexistent`');

        $request = new ServerRequest();

        $this->assertFalse($request->is('nonexistent'));
    }

    /**
     * Test is() with JSON and XML.
     */
    public function testIsJsonAndXml(): void
    {
        $request = new ServerRequest();
        $request = $request->withEnv('HTTP_ACCEPT', 'application/json, text/plain, */*');
        $this->assertTrue($request->is('json'));

        $request = new ServerRequest();
        $request = $request->withEnv('HTTP_ACCEPT', 'application/xml, text/plain, */*');
        $this->assertTrue($request->is('xml'));

        $request = new ServerRequest();
        $request = $request->withEnv('HTTP_ACCEPT', 'text/xml, */*');
        $this->assertTrue($request->is('xml'));
    }

    /**
     * Test is() with multiple types.
     */
    public function testIsMultiple(): void
    {
        $request = new ServerRequest();

        $request = $request->withEnv('REQUEST_METHOD', 'GET');
        $this->assertTrue($request->is(['get', 'post']));

        $request = $request->withEnv('REQUEST_METHOD', 'POST');
        $this->assertTrue($request->is(['get', 'post']));

        $request = $request->withEnv('REQUEST_METHOD', 'PUT');
        $this->assertFalse($request->is(['get', 'post']));
    }

    /**
     * Test isAll()
     */
    public function testIsAll(): void
    {
        $request = new ServerRequest();

        $request = $request->withEnv('HTTP_X_REQUESTED_WITH', 'XMLHttpRequest');
        $request = $request->withEnv('REQUEST_METHOD', 'GET');

        $this->assertTrue($request->isAll(['ajax', 'get']));
        $this->assertFalse($request->isAll(['post', 'get']));
        $this->assertFalse($request->isAll(['ajax', 'post']));
    }

    /**
     * Test getMethod()
     */
    public function testGetMethod(): void
    {
        $request = new ServerRequest([
            'environment' => ['REQUEST_METHOD' => 'delete'],
        ]);
        $this->assertSame('delete', $request->getMethod());
    }

    /**
     * Test withMethod()
     */
    public function testWithMethod(): void
    {
        $request = new ServerRequest([
            'environment' => ['REQUEST_METHOD' => 'delete'],
        ]);
        $new = $request->withMethod('put');
        $this->assertNotSame($new, $request);
        $this->assertSame('delete', $request->getMethod());
        $this->assertSame('put', $new->getMethod());
    }

    /**
     * Test withMethod() and invalid data
     */
    public function testWithMethodInvalid(): void
    {
        $this->expectException(InvalidArgumentException::class);
        $this->expectExceptionMessage('Unsupported HTTP method `no good` provided');
        $request = new ServerRequest([
            'environment' => ['REQUEST_METHOD' => 'delete'],
        ]);
        $request->withMethod('no good');
    }

    /**
     * Test getProtocolVersion()
     */
    public function testGetProtocolVersion(): void
    {
        $request = new ServerRequest();
        $this->assertSame('1.1', $request->getProtocolVersion());

        // SERVER var.
        $request = new ServerRequest([
            'environment' => ['SERVER_PROTOCOL' => 'HTTP/1.0'],
        ]);
        $this->assertSame('1.0', $request->getProtocolVersion());
    }

    /**
     * Test withProtocolVersion()
     */
    public function testWithProtocolVersion(): void
    {
        $request = new ServerRequest();
        $new = $request->withProtocolVersion('1.0');
        $this->assertNotSame($new, $request);
        $this->assertSame('1.1', $request->getProtocolVersion());
        $this->assertSame('1.0', $new->getProtocolVersion());
    }

    /**
     * Test withProtocolVersion() and invalid data
     */
    public function testWithProtocolVersionInvalid(): void
    {
        $this->expectException(InvalidArgumentException::class);
        $this->expectExceptionMessage('Unsupported protocol version `no good` provided');
        $request = new ServerRequest();
        $request->withProtocolVersion('no good');
    }

    /**
     * Test host retrieval.
     */
    public function testHost(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_HOST' => 'localhost',
            'HTTP_X_FORWARDED_HOST' => 'cakephp.org',
        ]]);
        $this->assertSame('localhost', $request->host());

        $request->trustProxy = true;
        $this->assertSame('cakephp.org', $request->host());
    }

    /**
     * test port retrieval.
     */
    public function testPort(): void
    {
        $request = new ServerRequest(['environment' => ['SERVER_PORT' => '80']]);

        $this->assertSame('80', $request->port());

        $request = $request->withEnv('SERVER_PORT', '443');
        $request = $request->withEnv('HTTP_X_FORWARDED_PORT', '80');
        $this->assertSame('443', $request->port());

        $request->trustProxy = true;
        $this->assertSame('80', $request->port());
    }

    /**
     * test domain retrieval.
     */
    public function testDomain(): void
    {
        $request = new ServerRequest(['environment' => ['HTTP_HOST' => 'something.example.com']]);

        $this->assertSame('example.com', $request->domain());

        $request = $request->withEnv('HTTP_HOST', 'something.example.co.uk');
        $this->assertSame('example.co.uk', $request->domain(2));
    }

    /**
     * Test scheme() method.
     */
    public function testScheme(): void
    {
        $request = new ServerRequest(['environment' => ['HTTPS' => 'on']]);

        $this->assertSame('https', $request->scheme());

        $request = $request->withEnv('HTTPS', '');
        $this->assertSame('http', $request->scheme());

        $request = $request->withEnv('HTTP_X_FORWARDED_PROTO', 'https');
        $request->trustProxy = true;
        $this->assertSame('https', $request->scheme());
    }

    /**
     * test getting subdomains for a host.
     */
    public function testSubdomain(): void
    {
        $request = new ServerRequest(['environment' => ['HTTP_HOST' => 'something.example.com']]);

        $this->assertEquals(['something'], $request->subdomains());

        $request = $request->withEnv('HTTP_HOST', 'www.something.example.com');
        $this->assertEquals(['www', 'something'], $request->subdomains());

        $request = $request->withEnv('HTTP_HOST', 'www.something.example.co.uk');
        $this->assertEquals(['www', 'something'], $request->subdomains(2));

        $request = $request->withEnv('HTTP_HOST', 'example.co.uk');
        $this->assertEquals([], $request->subdomains(2));
    }

    /**
     * Test AJAX, flash and friends
     */
    public function testIsAjax(): void
    {
        $request = new ServerRequest();

        $request = $request->withEnv('HTTP_X_REQUESTED_WITH', 'XMLHttpRequest');
        $this->assertTrue($request->is('ajax'));

        $request = $request->withEnv('HTTP_X_REQUESTED_WITH', 'XMLHTTPREQUEST');
        $this->assertFalse($request->is('ajax'));
        $this->assertFalse($request->isAjax());
    }

    /**
     * Test __call exceptions
     */
    public function testMagicCallExceptionOnUnknownMethod(): void
    {
        $this->expectException(BadMethodCallException::class);
        $request = new ServerRequest();
        $request->IamABanana();
    }

    /**
     * Test is(ssl)
     */
    public function testIsSsl(): void
    {
        $request = new ServerRequest();

        $request = $request->withEnv('HTTPS', 'on');
        $this->assertTrue($request->is('https'));

        $request = $request->withEnv('HTTPS', '1');
        $this->assertTrue($request->is('https'));

        $request = $request->withEnv('HTTPS', 'I am not empty');
        $this->assertFalse($request->is('https'));

        $request = $request->withEnv('HTTPS', 'off');
        $this->assertFalse($request->is('https'));

        $request = $request->withEnv('HTTPS', '');
        $this->assertFalse($request->is('https'));
    }

    /**
     * Test adding detectors and having them work.
     */
    public function testAddDetector(): void
    {
        $request = new ServerRequest();

        ServerRequest::addDetector('closure', function ($request) {
            return true;
        });
        $this->assertTrue($request->is('closure'));

        ServerRequest::addDetector('get', function ($request) {
            return $request->getEnv('REQUEST_METHOD') === 'GET';
        });
        $request = $request->withEnv('REQUEST_METHOD', 'GET');
        $this->assertTrue($request->is('get'));

        ServerRequest::addDetector('compare', ['env' => 'TEST_VAR', 'value' => 'something']);

        $request = $request->withEnv('TEST_VAR', 'something');
        $this->assertTrue($request->is('compare'), 'Value match failed.');

        $request = $request->withEnv('TEST_VAR', 'wrong');
        $this->assertFalse($request->is('compare'), 'Value mis-match failed.');

        ServerRequest::addDetector('compareCamelCase', ['env' => 'TEST_VAR', 'value' => 'foo']);

        $request = $request->withEnv('TEST_VAR', 'foo');
        $this->assertTrue($request->is('compareCamelCase'), 'Value match failed.');
        $this->assertTrue($request->is('comparecamelcase'), 'detectors should be case insensitive');
        $this->assertTrue($request->is('COMPARECAMELCASE'), 'detectors should be case insensitive');

        $request = $request->withEnv('TEST_VAR', 'not foo');
        $this->assertFalse($request->is('compareCamelCase'), 'Value match failed.');
        $this->assertFalse($request->is('comparecamelcase'), 'detectors should be case insensitive');
        $this->assertFalse($request->is('COMPARECAMELCASE'), 'detectors should be case insensitive');

        ServerRequest::addDetector('banana', ['env' => 'TEST_VAR', 'pattern' => '/^ban.*$/']);
        $request = $request->withEnv('TEST_VAR', 'banana');
        $this->assertTrue($request->isBanana());

        $request = $request->withEnv('TEST_VAR', 'wrong value');
        $this->assertFalse($request->isBanana());

        ServerRequest::addDetector('mobile', ['env' => 'HTTP_USER_AGENT', 'options' => ['Imagination']]);
        $request = $request->withEnv('HTTP_USER_AGENT', 'Imagination land');
        $this->assertTrue($request->isMobile());

        ServerRequest::addDetector('index', ['param' => 'action', 'value' => 'index']);

        $request = $request->withParam('action', 'index');
        $request->clearDetectorCache();
        $this->assertTrue($request->isIndex());

        $request = $request->withParam('action', 'add');
        $request->clearDetectorCache();
        $this->assertFalse($request->isIndex());

        ServerRequest::addDetector('withParams', function ($request, array $params) {
            foreach ($params as $name => $value) {
                if ($request->getParam($name) != $value) {
                    return false;
                }
            }

            return true;
        });

        $request = $request->withParam('controller', 'Pages')->withParam('action', 'index');
        $request->clearDetectorCache();
        $this->assertTrue($request->isWithParams(['controller' => 'Pages', 'action' => 'index']));

        $request = $request->withParam('controller', 'Posts');
        $request->clearDetectorCache();
        $this->assertFalse($request->isWithParams(['controller' => 'Pages', 'action' => 'index']));

        ServerRequest::addDetector('callme', function ($request) {
            return $request->getAttribute('return');
        });
        $request = $request->withAttribute('return', true);
        $request->clearDetectorCache();
        $this->assertTrue($request->isCallMe());

        ServerRequest::addDetector('extension', ['param' => '_ext', 'options' => ['pdf', 'png', 'txt']]);
        $request = $request->withParam('_ext', 'pdf');
        $request->clearDetectorCache();
        $this->assertTrue($request->is('extension'));

        $request = $request->withParam('_ext', 'exe');
        $request->clearDetectorCache();
        $this->assertFalse($request->isExtension());
    }

    /**
     * Test getting headers
     */
    public function testHeader(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_HOST' => 'localhost',
            'HTTP_USER_AGENT' => 'Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-ca) AppleWebKit/534.8+ (KHTML, like Gecko) Version/5.0 Safari/533.16',
            'CONTENT_TYPE' => 'application/json',
            'CONTENT_LENGTH' => '1337',
            'HTTP_CONTENT_MD5' => 'abc123',
        ]]);

        $this->assertEquals($request->getEnv('HTTP_HOST'), $request->getHeaderLine('host'));
        $this->assertEquals($request->getEnv('HTTP_USER_AGENT'), $request->getHeaderLine('User-Agent'));
        $this->assertEquals($request->getEnv('CONTENT_LENGTH'), $request->getHeaderLine('content-length'));
        $this->assertEquals($request->getEnv('CONTENT_TYPE'), $request->getHeaderLine('content-type'));
        $this->assertEquals($request->getEnv('HTTP_CONTENT_MD5'), $request->getHeaderLine('content-md5'));
    }

    /**
     * Test getting headers with psr7 methods
     */
    public function testGetHeaders(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_HOST' => 'localhost',
            'CONTENT_TYPE' => 'application/json',
            'CONTENT_LENGTH' => 1337,
            'HTTP_CONTENT_MD5' => 'abc123',
            'HTTP_DOUBLE' => ['a', 'b'],
        ]]);
        $headers = $request->getHeaders();
        $expected = [
            'Host' => ['localhost'],
            'Content-Type' => ['application/json'],
            'Content-Length' => [1337],
            'Content-Md5' => ['abc123'],
            'Double' => ['a', 'b'],
        ];
        $this->assertEquals($expected, $headers);
    }

    /**
     * Test hasHeader
     */
    public function testHasHeader(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_HOST' => 'localhost',
            'CONTENT_TYPE' => 'application/json',
            'CONTENT_LENGTH' => 1337,
            'HTTP_CONTENT_MD5' => 'abc123',
            'HTTP_DOUBLE' => ['a', 'b'],
        ]]);
        $this->assertTrue($request->hasHeader('Host'));
        $this->assertTrue($request->hasHeader('Content-Type'));
        $this->assertTrue($request->hasHeader('Content-MD5'));
        $this->assertTrue($request->hasHeader('Double'));
        $this->assertFalse($request->hasHeader('Authorization'));
    }

    /**
     * Test getting headers with psr7 methods
     */
    public function testGetHeader(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_HOST' => 'localhost',
            'CONTENT_TYPE' => 'application/json',
            'CONTENT_LENGTH' => 1337,
            'HTTP_CONTENT_MD5' => 'abc123',
            'HTTP_DOUBLE' => ['a', 'b'],
        ]]);
        $this->assertEquals([], $request->getHeader('Not-there'));

        $expected = [$request->getEnv('HTTP_HOST')];
        $this->assertEquals($expected, $request->getHeader('Host'));
        $this->assertEquals($expected, $request->getHeader('host'));
        $this->assertEquals($expected, $request->getHeader('HOST'));
        $this->assertEquals(['a', 'b'], $request->getHeader('Double'));
    }

    /**
     * Test getting headers with psr7 methods
     */
    public function testGetHeaderLine(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_HOST' => 'localhost',
            'CONTENT_TYPE' => 'application/json',
            'CONTENT_LENGTH' => '1337',
            'HTTP_CONTENT_MD5' => 'abc123',
            'HTTP_DOUBLE' => ['a', 'b'],
        ]]);
        $this->assertSame('', $request->getHeaderLine('Authorization'));

        $expected = $request->getEnv('CONTENT_LENGTH');
        $this->assertEquals($expected, $request->getHeaderLine('Content-Length'));
        $this->assertEquals($expected, $request->getHeaderLine('content-Length'));
        $this->assertEquals($expected, $request->getHeaderLine('ConTent-LenGth'));
        $this->assertSame('a, b', $request->getHeaderLine('Double'));
    }

    /**
     * Test setting a header.
     */
    public function testWithHeader(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_HOST' => 'localhost',
            'CONTENT_TYPE' => 'application/json',
            'CONTENT_LENGTH' => '1337',
            'HTTP_CONTENT_MD5' => 'abc123',
            'HTTP_DOUBLE' => ['a', 'b'],
        ]]);
        $new = $request->withHeader('Content-Length', '999');
        $this->assertNotSame($new, $request);

        $this->assertSame('1337', $request->getHeaderLine('Content-length'), 'old request is unchanged');
        $this->assertSame('999', $new->getHeaderLine('Content-length'), 'new request is correct');

        $new = $request->withHeader('Double', ['a']);
        $this->assertEquals(['a'], $new->getHeader('Double'), 'List values are overwritten');
    }

    /**
     * Test adding a header.
     */
    public function testWithAddedHeader(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_HOST' => 'localhost',
            'CONTENT_TYPE' => 'application/json',
            'CONTENT_LENGTH' => 1337,
            'HTTP_CONTENT_MD5' => 'abc123',
            'HTTP_DOUBLE' => ['a', 'b'],
        ]]);
        $new = $request->withAddedHeader('Double', 'c');
        $this->assertNotSame($new, $request);

        $this->assertSame('a, b', $request->getHeaderLine('Double'), 'old request is unchanged');
        $this->assertSame('a, b, c', $new->getHeaderLine('Double'), 'new request is correct');

        $new = $request->withAddedHeader('Content-Length', 777);
        $this->assertEquals([1337, 777], $new->getHeader('Content-Length'), 'scalar values are appended');

        $new = $request->withAddedHeader('Content-Length', [123, 456]);
        $this->assertEquals([1337, 123, 456], $new->getHeader('Content-Length'), 'List values are merged');
    }

    /**
     * Test removing a header.
     */
    public function testWithoutHeader(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_HOST' => 'localhost',
            'CONTENT_TYPE' => 'application/json',
            'CONTENT_LENGTH' => 1337,
            'HTTP_CONTENT_MD5' => 'abc123',
            'HTTP_DOUBLE' => ['a', 'b'],
        ]]);
        $new = $request->withoutHeader('Content-Length');
        $this->assertNotSame($new, $request);

        $this->assertSame('1337', $request->getHeaderLine('Content-length'), 'old request is unchanged');
        $this->assertSame('', $new->getHeaderLine('Content-length'), 'new request is correct');
    }

    /**
     * Test accepts() with and without parameters
     */
    public function testAccepts(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_ACCEPT' => 'text/xml,application/xml;q=0.9,application/xhtml+xml,text/html,text/plain,image/png',
        ]]);

        $result = $request->accepts();
        $expected = [
            'text/xml', 'application/xhtml+xml', 'text/html', 'text/plain', 'image/png', 'application/xml',
        ];
        $this->assertEquals($expected, $result, 'Content types differ.');

        $result = $request->accepts('text/html');
        $this->assertTrue($result);

        $result = $request->accepts('image/gif');
        $this->assertFalse($result);
    }

    /**
     * Test that accept header types are trimmed for comparisons.
     */
    public function testAcceptWithWhitespace(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_ACCEPT' => 'text/xml  ,  text/html ,  text/plain,image/png',
        ]]);
        $result = $request->accepts();
        $expected = [
            'text/xml', 'text/html', 'text/plain', 'image/png',
        ];
        $this->assertEquals($expected, $result, 'Content types differ.');

        $this->assertTrue($request->accepts('text/html'));
    }

    /**
     * Content types from accepts() should respect the client's q preference values.
     */
    public function testAcceptWithQvalueSorting(): void
    {
        $request = new ServerRequest(['environment' => [
            'HTTP_ACCEPT' => 'text/html;q=0.8,application/json;q=0.7,application/xml;q=1.0',
        ]]);
        $result = $request->accepts();
        $expected = ['application/xml', 'text/html', 'application/json'];
        $this->assertEquals($expected, $result);
    }

    /**
     * Test the getQuery() method
     */
    public function testGetQuery(): void
    {
        $array = [
            'query' => [
                'foo' => 'bar',
                'zero' => '0',
                'test' => [
                    'foo', 'bar',
                ],
            ],
        ];
        $request = new ServerRequest($array);

        $this->assertEquals([
            'foo' => 'bar',
            'zero' => '0',
            'test' => [
                'foo', 'bar',
            ],
        ], $request->getQuery());

        $this->assertSame('bar', $request->getQuery('foo'));
        $this->assertSame('0', $request->getQuery('zero'));
        $this->assertNull($request->getQuery('imaginary'));
        $this->assertSame('default', $request->getQuery('imaginary', 'default'));
        $this->assertFalse($request->getQuery('imaginary', false));

        $this->assertSame(['foo', 'bar'], $request->getQuery('test'));
        $this->assertSame('bar', $request->getQuery('test.1'));
        $this->assertNull($request->getQuery('test.2'));
        $this->assertSame('default', $request->getQuery('test.2', 'default'));
    }

    /**
     * Test getQueryParams
     */
    public function testGetQueryParams(): void
    {
        $get = [
            'test' => ['foo', 'bar'],
            'key' => 'value',
        ];

        $request = new ServerRequest([
            'query' => $get,
        ]);
        $this->assertSame($get, $request->getQueryParams());
    }

    /**
     * Test withQueryParams and immutability
     */
    public function testWithQueryParams(): void
    {
        $get = [
            'test' => ['foo', 'bar'],
            'key' => 'value',
        ];

        $request = new ServerRequest([
            'query' => $get,
        ]);
        $new = $request->withQueryParams(['new' => 'data']);
        $this->assertSame($get, $request->getQueryParams());
        $this->assertSame(['new' => 'data'], $new->getQueryParams());
    }

    /**
     * Test using param()
     */
    public function testReadingParams(): void
    {
        $request = new ServerRequest([
            'params' => [
                'controller' => 'Posts',
                'admin' => true,
                'truthy' => 1,
                'zero' => '0',
            ],
        ]);
        $this->assertNull($request->getParam('not_set'));
        $this->assertTrue($request->getParam('admin'));
        $this->assertSame(1, $request->getParam('truthy'));
        $this->assertSame('Posts', $request->getParam('controller'));
        $this->assertSame('0', $request->getParam('zero'));
    }

    /**
     * Test the data() method reading
     */
    public function testGetData(): void
    {
        $post = [
            'Model' => [
                'field' => 'value',
            ],
        ];
        $request = new ServerRequest(compact('post'));
        $this->assertEquals($post['Model'], $request->getData('Model'));

        $this->assertEquals($post, $request->getData());
        $this->assertNull($request->getData('Model.imaginary'));

        $this->assertSame('value', $request->getData('Model.field', 'default'));
        $this->assertSame('default', $request->getData('Model.imaginary', 'default'));
    }

    /**
     * Test setting post data to a string throws exception.
     */
    public function testInvalidStringData(): void
    {
        $this->expectException(InvalidArgumentException::class);
        $this->expectExceptionMessage('`post` key must be an array, object or null. Got `string` instead.');

        $post = 'strange, but could happen';
        new ServerRequest(compact('post'));
    }

    /**
     * Test writing falsey values.
     */
    public function testDataWritingFalsey(): void
    {
        $request = new ServerRequest();

        $request = $request->withData('Post.null', null);
        $this->assertNull($request->getData('Post.null'));

        $request = $request->withData('Post.false', false);
        $this->assertFalse($request->getData('Post.false'));

        $request = $request->withData('Post.zero', 0);
        $this->assertSame(0, $request->getData('Post.zero'));

        $request = $request->withData('Post.empty', '');
        $this->assertSame('', $request->getData('Post.empty'));
    }

    /**
     * Test reading params
     *
     * @dataProvider paramReadingDataProvider
     * @param mixed $expected
     */
    public function testGetParam(string $toRead, $expected): void
    {
        $request = new ServerRequest([
            'url' => '/',
            'params' => [
                'action' => 'index',
                'foo' => 'bar',
                'baz' => [
                    'a' => [
                        'b' => 'c',
                    ],
                ],
                'admin' => true,
                'truthy' => 1,
                'zero' => '0',
            ],
        ]);
        $this->assertSame($expected, $request->getParam($toRead));
    }

    /**
     * Test getParam returning a default value.
     */
    public function testGetParamDefault(): void
    {
        $request = new ServerRequest([
            'params' => [
                'controller' => 'Articles',
                'null' => null,
            ],
        ]);
        $this->assertSame('Articles', $request->getParam('controller', 'default'));
        $this->assertSame('default', $request->getParam('null', 'default'));
        $this->assertFalse($request->getParam('unset', false));
        $this->assertNull($request->getParam('unset'));
    }

    /**
     * Data provider for testing reading values with ServerRequest::getParam()
     *
     * @return array
     */
    public static function paramReadingDataProvider(): array
    {
        return [
            [
                'action',
                'index',
            ],
            [
                'baz',
                [
                    'a' => [
                        'b' => 'c',
                    ],
                ],
            ],
            [
                'baz.a.b',
                'c',
            ],
            [
                'does_not_exist',
                null,
            ],
            [
                'admin',
                true,
            ],
            [
                'truthy',
                1,
            ],
            [
                'zero',
                '0',
            ],
        ];
    }

    /**
     * test writing request params with param()
     */
    public function testParamWriting(): void
    {
        $request = new ServerRequest(['url' => '/']);
        $request = $request->withParam('action', 'index');

        $this->assertInstanceOf(
            'Cake\Http\ServerRequest',
            $request->withParam('some', 'thing'),
            'Method has not returned $this'
        );

        $request = $request->withParam('Post.null', null);
        $this->assertNull($request->getParam('Post.null'), 'default value should be used.');

        $request = $request->withParam('Post.false', false);
        $this->assertFalse($request->getParam('Post.false'));

        $request = $request->withParam('Post.zero', 0);
        $this->assertSame(0, $request->getParam('Post.zero'));

        $request = $request->withParam('Post.empty', '');
        $this->assertSame('', $request->getParam('Post.empty'));

        $this->assertSame('index', $request->getParam('action'));
        $request = $request->withParam('action', 'edit');
        $this->assertSame('edit', $request->getParam('action'));
    }

    /**
     * Test accept language
     */
    public function testAcceptLanguage(): void
    {
        $request = new ServerRequest();

        // Weird language
        $request = $request->withEnv('HTTP_ACCEPT_LANGUAGE', 'inexistent,en-ca');
        $result = $request->acceptLanguage();
        $this->assertEquals(['inexistent', 'en-ca'], $result, 'Languages do not match');

        // No qualifier
        $request = $request->withEnv('HTTP_ACCEPT_LANGUAGE', 'es_mx,en_ca');
        $result = $request->acceptLanguage();
        $this->assertEquals(['es-mx', 'en-ca'], $result, 'Languages do not match');

        // With qualifier
        $request = $request->withEnv('HTTP_ACCEPT_LANGUAGE', 'en-US,en;q=0.8,pt-BR;q=0.6,pt;q=0.4');
        $result = $request->acceptLanguage();
        $this->assertEquals(['en-us', 'en', 'pt-br', 'pt'], $result, 'Languages do not match');

        // With spaces
        $request = $request->withEnv('HTTP_ACCEPT_LANGUAGE', 'da, en-gb;q=0.8, en;q=0.7');
        $result = $request->acceptLanguage();
        $this->assertEquals(['da', 'en-gb', 'en'], $result, 'Languages do not match');

        // Checking if requested
        $request = $request->withEnv('HTTP_ACCEPT_LANGUAGE', 'es_mx,en_ca');

        $result = $request->acceptLanguage('en-ca');
        $this->assertTrue($result);

        $result = $request->acceptLanguage('en-CA');
        $this->assertTrue($result);

        $result = $request->acceptLanguage('en-us');
        $this->assertFalse($result);

        $result = $request->acceptLanguage('en-US');
        $this->assertFalse($result);
    }

    /**
     * Test getBody
     */
    public function testGetBody(): void
    {
        $request = new ServerRequest([
            'input' => 'key=val&some=data',
        ]);
        $result = $request->getBody();
        $this->assertInstanceOf('Psr\Http\Message\StreamInterface', $result);
        $this->assertSame('key=val&some=data', $result->getContents());
    }

    /**
     * Test withBody
     */
    public function testWithBody(): void
    {
        $request = new ServerRequest([
            'input' => 'key=val&some=data',
        ]);
        $body = $this->getMockBuilder('Psr\Http\Message\StreamInterface')->getMock();
        $new = $request->withBody($body);
        $this->assertNotSame($new, $request);
        $this->assertNotSame($body, $request->getBody());
        $this->assertSame($body, $new->getBody());
    }

    /**
     * Test getUri
     */
    public function testGetUri(): void
    {
        $request = new ServerRequest(['url' => 'articles/view/3']);
        $result = $request->getUri();
        $this->assertInstanceOf('Psr\Http\Message\UriInterface', $result);
        $this->assertSame('/articles/view/3', $result->getPath());
    }

    /**
     * Test withUri
     */
    public function testWithUri(): void
    {
        $request = new ServerRequest([
            'environment' => [
                'HTTP_HOST' => 'example.com',
            ],
            'url' => 'articles/view/3',
        ]);
        $uri = $this->getMockBuilder('Psr\Http\Message\UriInterface')->getMock();
        $new = $request->withUri($uri);
        $this->assertNotSame($new, $request);
        $this->assertNotSame($uri, $request->getUri());
        $this->assertSame($uri, $new->getUri());
    }

    /**
     * Test withUri() and preserveHost
     */
    public function testWithUriPreserveHost(): void
    {
        $request = new ServerRequest([
            'environment' => [
                'HTTP_HOST' => 'localhost',
            ],
            'url' => 'articles/view/3',
        ]);
        $uri = new Uri();
        $uri = $uri->withHost('example.com')
            ->withPort(123)
            ->withPath('articles/view/3');
        $new = $request->withUri($uri, false);

        $this->assertNotSame($new, $request);
        $this->assertSame('example.com:123', $new->getHeaderLine('Host'));
    }

    /**
     * Test withUri() and preserveHost missing the host header
     */
    public function testWithUriPreserveHostNoHostHeader(): void
    {
        $request = new ServerRequest([
            'url' => 'articles/view/3',
        ]);
        $uri = new Uri();
        $uri = $uri->withHost('example.com')
            ->withPort(123)
            ->withPath('articles/view/3');
        $new = $request->withUri($uri, false);

        $this->assertSame('example.com:123', $new->getHeaderLine('Host'));
    }

    /**
     * Test the cookie() method.
     */
    public function testGetCookie(): void
    {
        $request = new ServerRequest([
            'cookies' => [
                'testing' => 'A value in the cookie',
                'user' => [
                    'remember' => '1',
                ],
                '123' => 'a integer key cookie',
            ],
        ]);
        $this->assertSame('A value in the cookie', $request->getCookie('testing'));
        $this->assertSame('a integer key cookie', $request->getCookie('123'));
        $this->assertNull($request->getCookie('not there'));
        $this->assertSame('default', $request->getCookie('not there', 'default'));

        $this->assertSame('1', $request->getCookie('user.remember'));
        $this->assertSame('1', $request->getCookie('user.remember', 'default'));
        $this->assertSame('default', $request->getCookie('user.not there', 'default'));
    }

    /**
     * Test getCookieParams()
     */
    public function testGetCookieParams(): void
    {
        $cookies = [
            'testing' => 'A value in the cookie',
        ];
        $request = new ServerRequest(['cookies' => $cookies]);
        $this->assertSame($cookies, $request->getCookieParams());
    }

    /**
     * Test withCookieParams()
     */
    public function testWithCookieParams(): void
    {
        $cookies = [
            'testing' => 'A value in the cookie',
        ];
        $request = new ServerRequest(['cookies' => $cookies]);
        $new = $request->withCookieParams(['remember_me' => 1]);
        $this->assertNotSame($new, $request);
        $this->assertSame($cookies, $request->getCookieParams());
        $this->assertSame(['remember_me' => 1], $new->getCookieParams());
    }

    /**
     * Test getting a cookie collection from a request.
     */
    public function testGetCookieCollection(): void
    {
        $cookies = [
            'remember_me' => 1,
            'color' => 'blue',
        ];
        $request = new ServerRequest(['cookies' => $cookies]);

        $cookies = $request->getCookieCollection();
        $this->assertInstanceOf(CookieCollection::class, $cookies);
        $this->assertCount(2, $cookies);
        $this->assertSame('1', $cookies->get('remember_me')->getValue());
        $this->assertSame('blue', $cookies->get('color')->getValue());
    }

    /**
     * Test replacing cookies from a collection
     */
    public function testWithCookieCollection(): void
    {
        $cookies = new CookieCollection([new Cookie('remember_me', 1), new Cookie('color', 'red')]);
        $request = new ServerRequest(['cookies' => ['bad' => 'goaway']]);
        $new = $request->withCookieCollection($cookies);
        $this->assertNotSame($new, $request, 'Should clone');

        $this->assertSame(['bad' => 'goaway'], $request->getCookieParams());
        $this->assertSame(['remember_me' => '1', 'color' => 'red'], $new->getCookieParams());
        $cookies = $new->getCookieCollection();
        $this->assertCount(2, $cookies);
        $this->assertSame('red', $cookies->get('color')->getValue());
    }

    /**
     * TestAllowMethod
     */
    public function testAllowMethod(): void
    {
        $request = new ServerRequest(['environment' => [
            'url' => '/posts/edit/1',
            'REQUEST_METHOD' => 'PUT',
        ]]);

        $this->assertTrue($request->allowMethod('put'));

        $request = $request->withEnv('REQUEST_METHOD', 'DELETE');
        $this->assertTrue($request->allowMethod(['post', 'delete']));
    }

    /**
     * Test allowMethod throwing exception
     */
    public function testAllowMethodException(): void
    {
        $request = new ServerRequest([
            'url' => '/posts/edit/1',
            'environment' => ['REQUEST_METHOD' => 'PUT'],
        ]);

        try {
            $request->allowMethod(['POST', 'DELETE']);
            $this->fail('An expected exception has not been raised.');
        } catch (MethodNotAllowedException $e) {
            $this->assertEquals(['Allow' => 'POST, DELETE'], $e->getHeaders());
        }

        $this->expectException(MethodNotAllowedException::class);

        $request->allowMethod('POST');
    }

    /**
     * Tests getting the session from the request
     */
    public function testGetSession(): void
    {
        $session = new Session();
        $request = new ServerRequest(['session' => $session]);
        $this->assertSame($session, $request->getSession());

        $request = new ServerRequest();
        $this->assertEquals($session, $request->getSession());
    }

    public function testGetFlash(): void
    {
        $request = new ServerRequest();
        $this->assertInstanceOf(FlashMessage::class, $request->getFlash());
    }

    /**
     * Test the content type method.
     */
    public function testContentType(): void
    {
        $request = new ServerRequest([
            'environment' => ['HTTP_CONTENT_TYPE' => 'application/json'],
        ]);
        $this->assertSame('application/json', $request->contentType());

        $request = new ServerRequest([
            'environment' => ['HTTP_CONTENT_TYPE' => 'application/xml'],
        ]);
        $this->assertSame('application/xml', $request->contentType(), 'prefer non http header.');
    }

    /**
     * Test updating params in a psr7 fashion.
     */
    public function testWithParam(): void
    {
        $request = new ServerRequest([
            'params' => ['controller' => 'Articles'],
        ]);
        $result = $request->withParam('action', 'view');
        $this->assertNotSame($result, $request, 'New instance should be made');
        $this->assertNull($request->getParam('action'), 'No side-effect on original');
        $this->assertSame('view', $result->getParam('action'));

        $result = $request->withParam('action', 'index')
            ->withParam('plugin', 'DebugKit')
            ->withParam('prefix', 'Admin');
        $this->assertNotSame($result, $request, 'New instance should be made');
        $this->assertNull($request->getParam('action'), 'No side-effect on original');
        $this->assertSame('index', $result->getParam('action'));
        $this->assertSame('DebugKit', $result->getParam('plugin'));
        $this->assertSame('Admin', $result->getParam('prefix'));
    }

    /**
     * Test getting the parsed body parameters.
     */
    public function testGetParsedBody(): void
    {
        $data = ['title' => 'First', 'body' => 'Best Article!'];
        $request = new ServerRequest(['post' => $data]);
        $this->assertSame($data, $request->getParsedBody());

        $request = new ServerRequest();
        $this->assertSame([], $request->getParsedBody());
    }

    /**
     * Test replacing the parsed body parameters.
     */
    public function testWithParsedBody(): void
    {
        $data = ['title' => 'First', 'body' => 'Best Article!'];
        $request = new ServerRequest([]);
        $new = $request->withParsedBody($data);

        $this->assertNotSame($request, $new);
        $this->assertSame([], $request->getParsedBody());
        $this->assertSame($data, $new->getParsedBody());
    }

    /**
     * Test updating POST data in a psr7 fashion.
     */
    public function testWithData(): void
    {
        $request = new ServerRequest([
            'post' => [
                'Model' => [
                    'field' => 'value',
                ],
            ],
        ]);
        $result = $request->withData('Model.new_value', 'new value');
        $this->assertNull($request->getData('Model.new_value'), 'Original request should not change.');
        $this->assertNotSame($result, $request);
        $this->assertSame('new value', $result->getData('Model.new_value'));
        $this->assertSame('new value', $result->getData()['Model']['new_value']);
        $this->assertSame('value', $result->getData('Model.field'));
    }

    /**
     * Test removing data from a request
     */
    public function testWithoutData(): void
    {
        $request = new ServerRequest([
            'post' => [
                'Model' => [
                    'id' => 1,
                    'field' => 'value',
                ],
            ],
        ]);
        $updated = $request->withoutData('Model.field');
        $this->assertNotSame($updated, $request);
        $this->assertSame('value', $request->getData('Model.field'), 'Original request should not change.');
        $this->assertNull($updated->getData('Model.field'), 'data removed from updated request');
        $this->assertFalse(isset($updated->getData()['Model']['field']), 'data removed from updated request');
    }

    /**
     * Test updating POST data when keys don't exist
     */
    public function testWithDataMissingIntermediaryKeys(): void
    {
        $request = new ServerRequest([
            'post' => [
                'Model' => [
                    'field' => 'value',
                ],
            ],
        ]);
        $result = $request->withData('Model.field.new_value', 'new value');
        $this->assertSame(
            'new value',
            $result->getData('Model.field.new_value')
        );
        $this->assertSame(
            'new value',
            $result->getData()['Model']['field']['new_value']
        );
    }

    /**
     * Test updating POST data with falsey values
     */
    public function testWithDataFalseyValues(): void
    {
        $request = new ServerRequest([
            'post' => [],
        ]);
        $result = $request->withData('false', false)
            ->withData('null', null)
            ->withData('empty_string', '')
            ->withData('zero', 0)
            ->withData('zero_string', '0');
        $expected = [
            'false' => false,
            'null' => null,
            'empty_string' => '',
            'zero' => 0,
            'zero_string' => '0',
        ];
        $this->assertSame($expected, $result->getData());
    }

    /**
     * Test setting attributes.
     */
    public function testWithAttribute(): void
    {
        $request = new ServerRequest([]);
        $this->assertNull($request->getAttribute('key'));
        $this->assertSame('default', $request->getAttribute('key', 'default'));

        $new = $request->withAttribute('key', 'value');
        $this->assertNotEquals($new, $request, 'Should be different');
        $this->assertNull($request->getAttribute('key'), 'Old instance not modified');
        $this->assertSame('value', $new->getAttribute('key'));

        $update = $new->withAttribute('key', ['complex']);
        $this->assertNotEquals($update, $new, 'Should be different');
        $this->assertSame(['complex'], $update->getAttribute('key'));
    }

    /**
     * Test that replacing the session can be done via withAttribute()
     */
    public function testWithAttributeSession(): void
    {
        $request = new ServerRequest([]);
        $request->getSession()->write('attrKey', 'session-value');

        $update = $request->withAttribute('session', Session::create());
        $this->assertSame('session-value', $request->getAttribute('session')->read('attrKey'));
        $this->assertNotSame($request->getAttribute('session'), $update->getAttribute('session'));
        $this->assertNotSame($request->getSession()->read('attrKey'), $update->getSession()->read('attrKey'));
    }

    /**
     * Test getting all attributes.
     */
    public function testGetAttributes(): void
    {
        $request = new ServerRequest([]);
        $new = $request->withAttribute('key', 'value')
            ->withAttribute('nully', null)
            ->withAttribute('falsey', false);

        $this->assertFalse($new->getAttribute('falsey'));
        $this->assertNull($new->getAttribute('nully'));
        $expected = [
            'key' => 'value',
            'nully' => null,
            'falsey' => false,
            'params' => [
                'plugin' => null,
                'controller' => null,
                'action' => null,
                '_ext' => null,
                'pass' => [],
            ],
            'webroot' => '',
            'base' => '',
            'here' => '/',
        ];
        $this->assertEquals($expected, $new->getAttributes());
    }

    /**
     * Test unsetting attributes.
     */
    public function testWithoutAttribute(): void
    {
        $request = new ServerRequest([]);
        $new = $request->withAttribute('key', 'value');
        $update = $request->withoutAttribute('key');

        $this->assertNotEquals($update, $new, 'Should be different');
        $this->assertNull($update->getAttribute('key'));
    }

    /**
     * Test that withoutAttribute() cannot remove emulatedAttributes properties.
     *
     * @dataProvider emulatedPropertyProvider
     */
    public function testWithoutAttributesDenyEmulatedProperties(string $prop): void
    {
        $this->expectException(InvalidArgumentException::class);
        $request = new ServerRequest([]);
        $request->withoutAttribute($prop);
    }

    /**
     * Test the requestTarget methods.
     */
    public function testWithRequestTarget(): void
    {
        $request = new ServerRequest([
            'environment' => [
                'REQUEST_URI' => '/articles/view/1',
                'QUERY_STRING' => 'comments=1&open=0',
            ],
            'base' => '/basedir',
        ]);
        $this->assertSame(
            '/articles/view/1?comments=1&open=0',
            $request->getRequestTarget(),
            'Should not include basedir.'
        );

        $new = $request->withRequestTarget('/articles/view/3');
        $this->assertNotSame($new, $request);
        $this->assertSame(
            '/articles/view/1?comments=1&open=0',
            $request->getRequestTarget(),
            'should be unchanged.'
        );
        $this->assertSame('/articles/view/3', $new->getRequestTarget(), 'reflects method call');
    }

    /**
     * Test withEnv()
     */
    public function testWithEnv(): void
    {
        $request = new ServerRequest();

        $newRequest = $request->withEnv('HTTP_HOST', 'cakephp.org');
        $this->assertNotSame($request, $newRequest);
        $this->assertSame('cakephp.org', $newRequest->getEnv('HTTP_HOST'));
    }

    /**
     * Test getEnv()
     */
    public function testGetEnv(): void
    {
        $request = new ServerRequest([
            'environment' => ['TEST' => 'ing'],
        ]);

        //Test default null
        $this->assertNull($request->getEnv('Foo'));

        //Test default set
        $this->assertSame('Bar', $request->getEnv('Foo', 'Bar'));

        //Test env() fallback
        $this->assertSame('ing', $request->getEnv('test'));
    }

    /**
     * Data provider for emulated property tests.
     *
     * @return array
     */
    public static function emulatedPropertyProvider(): array
    {
        return [
            ['here'],
            ['params'],
            ['base'],
            ['webroot'],
            ['session'],
        ];
    }
}