class ContentNegotiationRoutingTest

class ContentNegotiationRoutingTest extends KernelTestBase {
    use PathAliasTestTrait;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'conneg_test',
        'path_alias',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->installEntitySchema('path_alias');
    }
    
    /**
     * {@inheritdoc}
     */
    public function register(ContainerBuilder $container) {
        parent::register($container);
        // \Drupal\KernelTests\KernelTestBase::register() removes the alias path
        // processor.
        if ($container->hasDefinition('path_alias.path_processor')) {
            $definition = $container->getDefinition('path_alias.path_processor');
            $definition->addTag('path_processor_inbound', [
                'priority' => 100,
            ])
                ->addTag('path_processor_outbound', [
                'priority' => 300,
            ]);
        }
    }
    
    /**
     * Tests the content negotiation aspect of routing.
     */
    public function testContentRouting() {
        // Alias with extension pointing to no extension/constant content-type.
        $this->createPathAlias('/conneg/html', '/alias.html');
        // Alias with extension pointing to dynamic extension/linked content-type.
        $this->createPathAlias('/conneg/html?_format=json', '/alias.json');
        $tests = [
            // ['path', 'accept', 'content-type'],
            // Extension is part of the route path. Constant Content-type.
[
                'conneg/simple.json',
                '',
                'application/json',
            ],
            [
                'conneg/simple.json',
                'application/xml',
                'application/json',
            ],
            [
                'conneg/simple.json',
                'application/json',
                'application/json',
            ],
            // No extension. Constant Content-type.
[
                'conneg/html',
                '',
                'text/html',
            ],
            [
                'conneg/html',
                '*/*',
                'text/html',
            ],
            [
                'conneg/html',
                'application/xml',
                'text/html',
            ],
            [
                'conneg/html',
                'text/xml',
                'text/html',
            ],
            [
                'conneg/html',
                'text/html',
                'text/html',
            ],
            // Dynamic extension. Linked Content-type.
[
                'conneg/html?_format=json',
                '',
                'application/json',
            ],
            [
                'conneg/html?_format=json',
                '*/*',
                'application/json',
            ],
            [
                'conneg/html?_format=json',
                'application/xml',
                'application/json',
            ],
            [
                'conneg/html?_format=json',
                'application/json',
                'application/json',
            ],
            [
                'conneg/html?_format=xml',
                '',
                'application/xml',
            ],
            [
                'conneg/html?_format=xml',
                '*/*',
                'application/xml',
            ],
            [
                'conneg/html?_format=xml',
                'application/json',
                'application/xml',
            ],
            [
                'conneg/html?_format=xml',
                'application/xml',
                'application/xml',
            ],
            // Path with a variable. Variable contains a period.
[
                'conneg/plugin/plugin.id',
                '',
                'text/html',
            ],
            [
                'conneg/plugin/plugin.id',
                '*/*',
                'text/html',
            ],
            [
                'conneg/plugin/plugin.id',
                'text/xml',
                'text/html',
            ],
            [
                'conneg/plugin/plugin.id',
                'text/html',
                'text/html',
            ],
            // Alias with extension pointing to no extension/constant content-type.
[
                'alias.html',
                '',
                'text/html',
            ],
            [
                'alias.html',
                '*/*',
                'text/html',
            ],
            [
                'alias.html',
                'text/xml',
                'text/html',
            ],
            [
                'alias.html',
                'text/html',
                'text/html',
            ],
        ];
        foreach ($tests as $test) {
            $path = $test[0];
            $accept_header = $test[1];
            $content_type = $test[2];
            $message = "Testing path:{$path} Accept:{$accept_header} Content-type:{$content_type}";
            $request = Request::create('/' . $path);
            if ($accept_header) {
                $request->headers
                    ->set('Accept', $accept_header);
            }
            
            /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
            $kernel = \Drupal::getContainer()->get('http_kernel');
            $response = $kernel->handle($request);
            // Verbose message since simpletest doesn't let us provide a message and
            // see the error.
            $this->assertTrue(TRUE, $message);
            $this->assertEquals(Response::HTTP_OK, $response->getStatusCode());
            $this->assertStringContainsString($content_type, $response->headers
                ->get('Content-type'));
        }
    }
    
    /**
     * Full negotiation by header only.
     */
    public function testFullNegotiation() {
        $this->enableModules([
            'accept_header_routing_test',
        ]);
        $tests = [
            // ['path', 'accept', 'content-type'],
            // 406?
[
                'conneg/negotiate',
                '',
                'text/html',
            ],
            // 406?
[
                'conneg/negotiate',
                '',
                'text/html',
            ],
            // ['conneg/negotiate', '*/*', '??'],
[
                'conneg/negotiate',
                'application/json',
                'application/json',
            ],
            [
                'conneg/negotiate',
                'application/xml',
                'application/xml',
            ],
            [
                'conneg/negotiate',
                'application/json',
                'application/json',
            ],
            [
                'conneg/negotiate',
                'application/xml',
                'application/xml',
            ],
        ];
        foreach ($tests as $test) {
            $path = $test[0];
            $accept_header = $test[1];
            $content_type = $test[2];
            $request = Request::create('/' . $path);
            $request->headers
                ->set('Accept', $accept_header);
            
            /** @var \Symfony\Component\HttpKernel\HttpKernelInterface $kernel */
            $kernel = \Drupal::getContainer()->get('http_kernel');
            $response = $kernel->handle($request);
            $this->assertEquals(Response::HTTP_OK, $response->getStatusCode(), "Testing path:{$path} Accept:{$accept_header} Content-type:{$content_type}");
        }
    }

}