class UrlTest

class UrlTest extends UnitTestCase {
    
    /**
     * @var \Symfony\Component\DependencyInjection\ContainerInterface
     */
    protected $container;
    
    /**
     * The URL generator
     *
     * @var \Drupal\Core\Routing\UrlGeneratorInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $urlGenerator;
    
    /**
     * The path alias manager.
     *
     * @var \Drupal\path_alias\AliasManagerInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $pathAliasManager;
    
    /**
     * The router.
     *
     * @var \Drupal\Tests\Core\Routing\TestRouterInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $router;
    
    /**
     * An array of values to use for the test.
     *
     * @var array
     */
    protected $map;
    
    /**
     * The mocked path validator.
     *
     * @var \Drupal\Core\Path\PathValidatorInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $pathValidator;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        $map = [];
        $map[] = [
            'view.frontpage.page_1',
            [],
            [],
            FALSE,
            '/node',
        ];
        $map[] = [
            'node_view',
            [
                'node' => '1',
            ],
            [],
            FALSE,
            '/node/1',
        ];
        $map[] = [
            'node_edit',
            [
                'node' => '2',
            ],
            [],
            FALSE,
            '/node/2/edit',
        ];
        $this->map = $map;
        $alias_map = [
            // Set up one proper alias that can be resolved to a system path.
[
                'node-alias-test',
                NULL,
                FALSE,
                'node',
            ],
            // Passing in anything else should return the same string.
[
                'node',
                NULL,
                FALSE,
                'node',
            ],
            [
                'node/1',
                NULL,
                FALSE,
                'node/1',
            ],
            [
                'node/2/edit',
                NULL,
                FALSE,
                'node/2/edit',
            ],
            [
                'non-existent',
                NULL,
                FALSE,
                'non-existent',
            ],
        ];
        // $this->map has $collect_bubbleable_metadata = FALSE; also generate the
        // $collect_bubbleable_metadata = TRUE case for ::generateFromRoute().
        $generate_from_route_map = [];
        foreach ($this->map as $values) {
            $generate_from_route_map[] = $values;
            $generate_from_route_map[] = [
                $values[0],
                $values[1],
                $values[2],
                TRUE,
                (new GeneratedUrl())->setGeneratedUrl($values[4]),
            ];
        }
        $this->urlGenerator = $this->createMock('Drupal\\Core\\Routing\\UrlGeneratorInterface');
        $this->urlGenerator
            ->expects($this->any())
            ->method('generateFromRoute')
            ->will($this->returnValueMap($generate_from_route_map));
        $this->pathAliasManager = $this->createMock('Drupal\\path_alias\\AliasManagerInterface');
        $this->pathAliasManager
            ->expects($this->any())
            ->method('getPathByAlias')
            ->will($this->returnValueMap($alias_map));
        $this->router = $this->createMock('Drupal\\Tests\\Core\\Routing\\TestRouterInterface');
        $this->pathValidator = $this->createMock('Drupal\\Core\\Path\\PathValidatorInterface');
        $this->container = new ContainerBuilder();
        $this->container
            ->set('router.no_access_checks', $this->router);
        $this->container
            ->set('url_generator', $this->urlGenerator);
        $this->container
            ->set('path_alias.manager', $this->pathAliasManager);
        $this->container
            ->set('path.validator', $this->pathValidator);
        \Drupal::setContainer($this->container);
    }
    
    /**
     * Tests creating a Url from a request.
     */
    public function testUrlFromRequest() {
        $this->router
            ->expects($this->at(0))
            ->method('matchRequest')
            ->with($this->getRequestConstraint('/node'))
            ->willReturn([
            RouteObjectInterface::ROUTE_NAME => 'view.frontpage.page_1',
            '_raw_variables' => new ParameterBag(),
        ]);
        $this->router
            ->expects($this->at(1))
            ->method('matchRequest')
            ->with($this->getRequestConstraint('/node/1'))
            ->willReturn([
            RouteObjectInterface::ROUTE_NAME => 'node_view',
            '_raw_variables' => new ParameterBag([
                'node' => '1',
            ]),
        ]);
        $this->router
            ->expects($this->at(2))
            ->method('matchRequest')
            ->with($this->getRequestConstraint('/node/2/edit'))
            ->willReturn([
            RouteObjectInterface::ROUTE_NAME => 'node_edit',
            '_raw_variables' => new ParameterBag([
                'node' => '2',
            ]),
        ]);
        $urls = [];
        foreach ($this->map as $index => $values) {
            $path = array_pop($values);
            $url = Url::createFromRequest(Request::create("{$path}"));
            $expected = Url::fromRoute($values[0], $values[1], $values[2]);
            $this->assertEquals($expected, $url);
            $urls[$index] = $url;
        }
        return $urls;
    }
    
    /**
     * This constraint checks whether a Request object has the right path.
     *
     * @param string $path
     *   The path.
     *
     * @return \PHPUnit\Framework\Constraint\Callback
     *   The constraint checks whether a Request object has the right path.
     */
    protected function getRequestConstraint($path) {
        return $this->callback(function (Request $request) use ($path) {
            return $request->getPathInfo() == $path;
        });
    }
    
    /**
     * Tests the fromRoute() method with the special <front> path.
     *
     * @covers ::fromRoute
     */
    public function testFromRouteFront() {
        $url = Url::fromRoute('<front>');
        $this->assertSame('<front>', $url->getRouteName());
    }
    
    /**
     * Tests the fromUserInput method with valid paths.
     *
     * @covers ::fromUserInput
     * @dataProvider providerFromValidInternalUri
     */
    public function testFromUserInput($path) {
        $url = Url::fromUserInput($path);
        $uri = $url->getUri();
        $this->assertInstanceOf('Drupal\\Core\\Url', $url);
        $this->assertFalse($url->isRouted());
        $this->assertStringStartsWith('base:', $uri);
        $parts = UrlHelper::parse($path);
        $options = $url->getOptions();
        if (!empty($parts['fragment'])) {
            $this->assertSame($parts['fragment'], $options['fragment']);
        }
        else {
            $this->assertArrayNotHasKey('fragment', $options);
        }
        if (!empty($parts['query'])) {
            $this->assertEquals($parts['query'], $options['query']);
        }
        else {
            $this->assertArrayNotHasKey('query', $options);
        }
    }
    
    /**
     * Tests the fromUserInput method with invalid paths.
     *
     * @covers ::fromUserInput
     * @dataProvider providerFromInvalidInternalUri
     */
    public function testFromInvalidUserInput($path) {
        $this->expectException(\InvalidArgumentException::class);
        $url = Url::fromUserInput($path);
    }
    
    /**
     * Tests fromUri() method with a user-entered path not matching any route.
     *
     * @covers ::fromUri
     */
    public function testFromRoutedPathWithInvalidRoute() {
        $this->pathValidator
            ->expects($this->once())
            ->method('getUrlIfValidWithoutAccessCheck')
            ->with('invalid-path')
            ->willReturn(FALSE);
        $url = Url::fromUri('internal:/invalid-path');
        $this->assertSame(FALSE, $url->isRouted());
        $this->assertSame('base:invalid-path', $url->getUri());
    }
    
    /**
     * Tests fromUri() method with user-entered path matching a valid route.
     *
     * @covers ::fromUri
     */
    public function testFromRoutedPathWithValidRoute() {
        $url = Url::fromRoute('test_route');
        $this->pathValidator
            ->expects($this->once())
            ->method('getUrlIfValidWithoutAccessCheck')
            ->with('valid-path')
            ->willReturn($url);
        $result_url = Url::fromUri('internal:/valid-path');
        $this->assertSame($url, $result_url);
    }
    
    /**
     * Tests the createFromRequest method.
     *
     * @covers ::createFromRequest
     */
    public function testCreateFromRequest() {
        $attributes = [
            '_raw_variables' => new ParameterBag([
                'color' => 'chartreuse',
            ]),
            RouteObjectInterface::ROUTE_NAME => 'the_route_name',
        ];
        $request = new Request([], [], $attributes);
        $this->router
            ->expects($this->once())
            ->method('matchRequest')
            ->with($request)
            ->will($this->returnValue($attributes));
        $url = Url::createFromRequest($request);
        $expected = new Url('the_route_name', [
            'color' => 'chartreuse',
        ]);
        $this->assertEquals($expected, $url);
    }
    
    /**
     * Tests that an invalid request will thrown an exception.
     *
     * @covers ::createFromRequest
     */
    public function testUrlFromRequestInvalid() {
        $request = Request::create('/test-path');
        $this->router
            ->expects($this->once())
            ->method('matchRequest')
            ->with($request)
            ->will($this->throwException(new ResourceNotFoundException()));
        $this->expectException(ResourceNotFoundException::class);
        Url::createFromRequest($request);
    }
    
    /**
     * Tests the isExternal() method.
     *
     * @depends testUrlFromRequest
     *
     * @covers ::isExternal
     */
    public function testIsExternal($urls) {
        foreach ($urls as $url) {
            $this->assertFalse($url->isExternal());
        }
    }
    
    /**
     * Tests the getUri() method for internal URLs.
     *
     * @param \Drupal\Core\Url[] $urls
     *   Array of URL objects.
     *
     * @depends testUrlFromRequest
     *
     * @covers ::getUri
     */
    public function testGetUriForInternalUrl($urls) {
        $this->expectException(\UnexpectedValueException::class);
        foreach ($urls as $url) {
            $url->getUri();
        }
    }
    
    /**
     * Tests the getUri() method for external URLs.
     *
     * @covers ::getUri
     */
    public function testGetUriForExternalUrl() {
        $url = Url::fromUri('http://example.com/test');
        $this->assertEquals('http://example.com/test', $url->getUri());
    }
    
    /**
     * Tests the getUri() and isExternal() methods for protocol-relative URLs.
     *
     * @covers ::getUri
     * @covers ::isExternal
     */
    public function testGetUriForProtocolRelativeUrl() {
        $url = Url::fromUri('//example.com/test');
        $this->assertEquals('//example.com/test', $url->getUri());
        $this->assertTrue($url->isExternal());
    }
    
    /**
     * Tests the getInternalPath method().
     *
     * @param \Drupal\Core\Url[] $urls
     *   Array of URL objects.
     *
     * @covers ::getInternalPath
     *
     * @depends testUrlFromRequest
     */
    public function testGetInternalPath($urls) {
        $map = [];
        $map[] = [
            'view.frontpage.page_1',
            [],
            '/node',
        ];
        $map[] = [
            'node_view',
            [
                'node' => '1',
            ],
            '/node/1',
        ];
        $map[] = [
            'node_edit',
            [
                'node' => '2',
            ],
            '/node/2/edit',
        ];
        foreach ($urls as $index => $url) {
            // Clone the url so that there is no leak of internal state into the
            // other ones.
            $url = clone $url;
            $url_generator = $this->createMock('Drupal\\Core\\Routing\\UrlGeneratorInterface');
            $url_generator->expects($this->once())
                ->method('getPathFromRoute')
                ->will($this->returnValueMap($map, $index));
            $url->setUrlGenerator($url_generator);
            $url->getInternalPath();
            $url->getInternalPath();
        }
    }
    
    /**
     * Tests the toString() method.
     *
     * @param \Drupal\Core\Url[] $urls
     *   An array of Url objects.
     *
     * @depends testUrlFromRequest
     *
     * @covers ::toString
     */
    public function testToString($urls) {
        foreach ($urls as $index => $url) {
            $path = array_pop($this->map[$index]);
            $this->assertSame($path, $url->toString());
            $generated_url = $url->toString(TRUE);
            $this->assertSame($path, $generated_url->getGeneratedUrl());
            $this->assertInstanceOf('\\Drupal\\Core\\Render\\BubbleableMetadata', $generated_url);
        }
    }
    
    /**
     * Tests the getRouteName() method.
     *
     * @param \Drupal\Core\Url[] $urls
     *   An array of Url objects.
     *
     * @depends testUrlFromRequest
     *
     * @covers ::getRouteName
     */
    public function testGetRouteName($urls) {
        foreach ($urls as $index => $url) {
            $this->assertSame($this->map[$index][0], $url->getRouteName());
        }
    }
    
    /**
     * Tests the getRouteName() with an external URL.
     *
     * @covers ::getRouteName
     */
    public function testGetRouteNameWithExternalUrl() {
        $url = Url::fromUri('http://example.com');
        $this->expectException(\UnexpectedValueException::class);
        $url->getRouteName();
    }
    
    /**
     * Tests the getRouteParameters() method.
     *
     * @param \Drupal\Core\Url[] $urls
     *   An array of Url objects.
     *
     * @depends testUrlFromRequest
     *
     * @covers ::getRouteParameters
     */
    public function testGetRouteParameters($urls) {
        foreach ($urls as $index => $url) {
            $this->assertSame($this->map[$index][1], $url->getRouteParameters());
        }
    }
    
    /**
     * Tests the getRouteParameters() with an external URL.
     *
     * @covers ::getRouteParameters
     */
    public function testGetRouteParametersWithExternalUrl() {
        $url = Url::fromUri('http://example.com');
        $this->expectException(\UnexpectedValueException::class);
        $url->getRouteParameters();
    }
    
    /**
     * Tests the getOptions() method.
     *
     * @param \Drupal\Core\Url[] $urls
     *   An array of Url objects.
     *
     * @depends testUrlFromRequest
     *
     * @covers ::getOptions
     */
    public function testGetOptions($urls) {
        foreach ($urls as $index => $url) {
            $this->assertSame($this->map[$index][2], $url->getOptions());
        }
    }
    
    /**
     * Tests the setOptions() method.
     *
     * @covers ::setOptions
     */
    public function testSetOptions() {
        $url = Url::fromRoute('test_route', []);
        $this->assertEquals([], $url->getOptions());
        $url->setOptions([
            'foo' => 'bar',
        ]);
        $this->assertEquals([
            'foo' => 'bar',
        ], $url->getOptions());
        $url->setOptions([]);
        $this->assertEquals([], $url->getOptions());
    }
    
    /**
     * Tests the mergeOptions() method.
     *
     * @covers ::mergeOptions
     */
    public function testMergeOptions() {
        $url = Url::fromRoute('test_route', [], [
            'foo' => 'bar',
            'bar' => [
                'key' => 'value',
            ],
        ]);
        $url->mergeOptions([
            'bar' => [
                'key' => 'value1',
                'key2' => 'value2',
            ],
        ]);
        $this->assertEquals([
            'foo' => 'bar',
            'bar' => [
                'key' => 'value1',
                'key2' => 'value2',
            ],
        ], $url->getOptions());
    }
    
    /**
     * Tests the access() method for routed URLs.
     *
     * @param bool $access
     *
     * @covers ::access
     * @covers ::accessManager
     * @dataProvider accessProvider
     */
    public function testAccessRouted($access) {
        $account = $this->createMock('Drupal\\Core\\Session\\AccountInterface');
        $url = new TestUrl('entity.node.canonical', [
            'node' => 3,
        ]);
        $url->setAccessManager($this->getMockAccessManager($access, $account));
        $this->assertEquals($access, $url->access($account));
    }
    
    /**
     * Tests the access() method for unrouted URLs (they always have access).
     *
     * @covers ::access
     */
    public function testAccessUnrouted() {
        $account = $this->createMock('Drupal\\Core\\Session\\AccountInterface');
        $url = TestUrl::fromUri('base:kittens');
        $access_manager = $this->createMock('Drupal\\Core\\Access\\AccessManagerInterface');
        $access_manager->expects($this->never())
            ->method('checkNamedRoute');
        $url->setAccessManager($access_manager);
        $this->assertTrue($url->access($account));
    }
    
    /**
     * Tests the renderAccess() method.
     *
     * @param bool $access
     *
     * @covers ::renderAccess
     * @dataProvider accessProvider
     */
    public function testRenderAccess($access) {
        $element = [
            '#url' => Url::fromRoute('entity.node.canonical', [
                'node' => 3,
            ]),
        ];
        $this->container
            ->set('current_user', $this->createMock('Drupal\\Core\\Session\\AccountInterface'));
        $this->container
            ->set('access_manager', $this->getMockAccessManager($access));
        $this->assertEquals($access, TestUrl::renderAccess($element));
    }
    
    /**
     * Tests the fromRouteMatch() method.
     */
    public function testFromRouteMatch() {
        $route = new Route('/test-route/{foo}');
        $route_match = new RouteMatch('test_route', $route, [
            'foo' => (object) [
                1,
            ],
        ], [
            'foo' => 1,
        ]);
        $url = Url::fromRouteMatch($route_match);
        $this->assertSame('test_route', $url->getRouteName());
        $this->assertEquals([
            'foo' => '1',
        ], $url->getRouteParameters());
    }
    
    /**
     * Data provider for testing entity URIs
     */
    public function providerTestEntityUris() {
        return [
            [
                'entity:test_entity/1',
                [],
                'entity.test_entity.canonical',
                [
                    'test_entity' => '1',
                ],
                NULL,
                NULL,
            ],
            [
                // Ensure a fragment of #0 is handled correctly.
'entity:test_entity/1#0',
                [],
                'entity.test_entity.canonical',
                [
                    'test_entity' => '1',
                ],
                NULL,
                '0',
            ],
            // Ensure an empty fragment of # is in options discarded as expected.
[
                'entity:test_entity/1',
                [
                    'fragment' => '',
                ],
                'entity.test_entity.canonical',
                [
                    'test_entity' => '1',
                ],
                NULL,
                NULL,
            ],
            // Ensure an empty fragment of # in the URI is discarded as expected.
[
                'entity:test_entity/1#',
                [],
                'entity.test_entity.canonical',
                [
                    'test_entity' => '1',
                ],
                NULL,
                NULL,
            ],
            [
                'entity:test_entity/2?page=1&foo=bar#bottom',
                [],
                'entity.test_entity.canonical',
                [
                    'test_entity' => '2',
                ],
                [
                    'page' => '1',
                    'foo' => 'bar',
                ],
                'bottom',
            ],
            [
                'entity:test_entity/2?page=1&foo=bar#bottom',
                [
                    'fragment' => 'top',
                    'query' => [
                        'foo' => 'yes',
                        'focus' => 'no',
                    ],
                ],
                'entity.test_entity.canonical',
                [
                    'test_entity' => '2',
                ],
                [
                    'page' => '1',
                    'foo' => 'yes',
                    'focus' => 'no',
                ],
                'top',
            ],
        ];
    }
    
    /**
     * Tests the fromUri() method with an entity: URI.
     *
     * @covers ::fromUri
     *
     * @dataProvider providerTestEntityUris
     */
    public function testEntityUris($uri, $options, $route_name, $route_parameters, $query, $fragment) {
        $url = Url::fromUri($uri, $options);
        $this->assertSame($route_name, $url->getRouteName());
        $this->assertEquals($route_parameters, $url->getRouteParameters());
        $this->assertEquals($url->getOption('query'), $query);
        $this->assertSame($url->getOption('fragment'), $fragment);
    }
    
    /**
     * Tests the fromUri() method with an invalid entity: URI.
     *
     * @covers ::fromUri
     */
    public function testInvalidEntityUriParameter() {
        // Make the mocked URL generator behave like the actual one.
        $this->urlGenerator
            ->expects($this->once())
            ->method('generateFromRoute')
            ->with('entity.test_entity.canonical', [
            'test_entity' => '1/blah',
        ])
            ->willThrowException(new InvalidParameterException('Parameter "test_entity" for route "/test_entity/{test_entity}" must match "[^/]++" ("1/blah" given) to generate a corresponding URL..'));
        $this->expectException(InvalidParameterException::class);
        Url::fromUri('entity:test_entity/1/blah')->toString();
    }
    
    /**
     * Tests the toUriString() method with entity: URIs.
     *
     * @covers ::toUriString
     *
     * @dataProvider providerTestToUriStringForEntity
     */
    public function testToUriStringForEntity($uri, $options, $uri_string) {
        $url = Url::fromUri($uri, $options);
        $this->assertSame($url->toUriString(), $uri_string);
    }
    
    /**
     * Data provider for testing string entity URIs
     */
    public function providerTestToUriStringForEntity() {
        return [
            [
                'entity:test_entity/1',
                [],
                'route:entity.test_entity.canonical;test_entity=1',
            ],
            [
                'entity:test_entity/1',
                [
                    'fragment' => 'top',
                    'query' => [
                        'page' => '2',
                    ],
                ],
                'route:entity.test_entity.canonical;test_entity=1?page=2#top',
            ],
            [
                'entity:test_entity/1?page=2#top',
                [],
                'route:entity.test_entity.canonical;test_entity=1?page=2#top',
            ],
        ];
    }
    
    /**
     * Tests the toUriString() method with internal: URIs.
     *
     * @covers ::toUriString
     *
     * @dataProvider providerTestToUriStringForInternal
     */
    public function testToUriStringForInternal($uri, $options, $uri_string) {
        $url = Url::fromRoute('entity.test_entity.canonical', [
            'test_entity' => '1',
        ]);
        $this->pathValidator
            ->expects($this->any())
            ->method('getUrlIfValidWithoutAccessCheck')
            ->willReturnMap([
            [
                'test-entity/1',
                $url,
            ],
            [
                '<front>',
                Url::fromRoute('<front>'),
            ],
            [
                '<none>',
                Url::fromRoute('<none>'),
            ],
        ]);
        $url = Url::fromUri($uri, $options);
        $this->assertSame($url->toUriString(), $uri_string);
    }
    
    /**
     * Data provider for testing internal URIs.
     */
    public function providerTestToUriStringForInternal() {
        return [
            // The four permutations of a regular path.
[
                'internal:/test-entity/1',
                [],
                'route:entity.test_entity.canonical;test_entity=1',
            ],
            [
                'internal:/test-entity/1',
                [
                    'fragment' => 'top',
                ],
                'route:entity.test_entity.canonical;test_entity=1#top',
            ],
            [
                'internal:/test-entity/1',
                [
                    'fragment' => 'top',
                    'query' => [
                        'page' => '2',
                    ],
                ],
                'route:entity.test_entity.canonical;test_entity=1?page=2#top',
            ],
            [
                'internal:/test-entity/1?page=2#top',
                [],
                'route:entity.test_entity.canonical;test_entity=1?page=2#top',
            ],
            // The four permutations of the special '<front>' path.
[
                'internal:/',
                [],
                'route:<front>',
            ],
            [
                'internal:/',
                [
                    'fragment' => 'top',
                ],
                'route:<front>#top',
            ],
            [
                'internal:/',
                [
                    'fragment' => 'top',
                    'query' => [
                        'page' => '2',
                    ],
                ],
                'route:<front>?page=2#top',
            ],
            [
                'internal:/?page=2#top',
                [],
                'route:<front>?page=2#top',
            ],
            // The four permutations of the special '<none>' path.
[
                'internal:',
                [],
                'route:<none>',
            ],
            [
                'internal:',
                [
                    'fragment' => 'top',
                ],
                'route:<none>#top',
            ],
            [
                'internal:',
                [
                    'fragment' => 'top',
                    'query' => [
                        'page' => '2',
                    ],
                ],
                'route:<none>?page=2#top',
            ],
            [
                'internal:?page=2#top',
                [],
                'route:<none>?page=2#top',
            ],
        ];
    }
    
    /**
     * Tests the fromUri() method with a valid internal: URI.
     *
     * @covers ::fromUri
     * @dataProvider providerFromValidInternalUri
     */
    public function testFromValidInternalUri($path) {
        $url = Url::fromUri('internal:' . $path);
        $this->assertInstanceOf('Drupal\\Core\\Url', $url);
    }
    
    /**
     * Data provider for testFromValidInternalUri().
     */
    public function providerFromValidInternalUri() {
        return [
            // Normal paths with a leading slash.
[
                '/kittens',
            ],
            [
                '/kittens/bengal',
            ],
            // Fragments with and without leading slashes.
[
                '/#about-our-kittens',
            ],
            [
                '/kittens#feeding',
            ],
            [
                '#feeding',
            ],
            // Query strings with and without leading slashes.
[
                '/kittens?page=1000',
            ],
            [
                '/?page=1000',
            ],
            [
                '?page=1000',
            ],
            [
                '?breed=bengal&page=1000',
            ],
            [
                '?referrer=https://kittenfacts',
            ],
            // Paths with various token formats but no leading slash.
[
                '/[duckies]',
            ],
            [
                '/%bunnies',
            ],
            [
                '/{{ puppies }}',
            ],
            // Disallowed characters in the authority (host name) that are valid
            // elsewhere in the path.
[
                '/(:;2&+h^',
            ],
            [
                '/AKI@&hO@',
            ],
        ];
    }
    
    /**
     * Tests the fromUri() method with an invalid internal: URI.
     *
     * @covers ::fromUri
     * @dataProvider providerFromInvalidInternalUri
     */
    public function testFromInvalidInternalUri($path) {
        $this->expectException(\InvalidArgumentException::class);
        Url::fromUri('internal:' . $path);
    }
    
    /**
     * Data provider for testFromInvalidInternalUri().
     */
    public function providerFromInvalidInternalUri() {
        return [
            // Normal paths without a leading slash.
'normal_path0' => [
                'kittens',
            ],
            'normal_path1' => [
                'kittens/bengal',
            ],
            // Path without a leading slash containing a fragment.
'fragment' => [
                'kittens#feeding',
            ],
            // Path without a leading slash containing a query string.
'without_leading_slash_query' => [
                'kittens?page=1000',
            ],
            // Paths with various token formats but no leading slash.
'path_with_tokens0' => [
                '[duckies]',
            ],
            'path_with_tokens1' => [
                '%bunnies',
            ],
            'path_with_tokens2' => [
                '{{ puppies }}',
            ],
            // Disallowed characters in the authority (host name) that are valid
            // elsewhere in the path.
'disallowed_hostname_chars0' => [
                '(:;2&+h^',
            ],
            'disallowed_hostname_chars1' => [
                'AKI@&hO@',
            ],
            // Leading slash with a domain.
'leading_slash_with_domain' => [
                '/http://example.com',
            ],
        ];
    }
    
    /**
     * Tests the fromUri() method with a base: URI starting with a number.
     *
     * @covers ::fromUri
     */
    public function testFromUriNumber() {
        $url = Url::fromUri('base:2015/10/06');
        $this->assertSame($url->toUriString(), 'base:/2015/10/06');
    }
    
    /**
     * Tests the toUriString() method with route: URIs.
     *
     * @covers ::toUriString
     *
     * @dataProvider providerTestToUriStringForRoute
     */
    public function testToUriStringForRoute($uri, $options, $uri_string) {
        $url = Url::fromUri($uri, $options);
        $this->assertSame($url->toUriString(), $uri_string);
    }
    
    /**
     * Data provider for testing route: URIs.
     */
    public function providerTestToUriStringForRoute() {
        return [
            [
                'route:entity.test_entity.canonical;test_entity=1',
                [],
                'route:entity.test_entity.canonical;test_entity=1',
            ],
            [
                'route:entity.test_entity.canonical;test_entity=1',
                [
                    'fragment' => 'top',
                    'query' => [
                        'page' => '2',
                    ],
                ],
                'route:entity.test_entity.canonical;test_entity=1?page=2#top',
            ],
            [
                'route:entity.test_entity.canonical;test_entity=1?page=2#top',
                [],
                'route:entity.test_entity.canonical;test_entity=1?page=2#top',
            ],
            // Check that an empty fragment is discarded.
[
                'route:entity.test_entity.canonical;test_entity=1?page=2#',
                [],
                'route:entity.test_entity.canonical;test_entity=1?page=2',
            ],
            // Check that an empty fragment is discarded.
[
                'route:entity.test_entity.canonical;test_entity=1?page=2',
                [
                    'fragment' => '',
                ],
                'route:entity.test_entity.canonical;test_entity=1?page=2',
            ],
            // Check that a fragment of #0 is preserved.
[
                'route:entity.test_entity.canonical;test_entity=1?page=2#0',
                [],
                'route:entity.test_entity.canonical;test_entity=1?page=2#0',
            ],
        ];
    }
    
    /**
     * @covers ::fromUri
     */
    public function testFromRouteUriWithMissingRouteName() {
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage("The route URI 'route:' is invalid.");
        Url::fromUri('route:');
    }
    
    /**
     * Creates a mock access manager for the access tests.
     *
     * @param bool $access
     * @param \Drupal\Core\Session\AccountInterface|null $account
     *
     * @return \Drupal\Core\Access\AccessManagerInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected function getMockAccessManager($access, $account = NULL) {
        $access_manager = $this->createMock('Drupal\\Core\\Access\\AccessManagerInterface');
        $access_manager->expects($this->once())
            ->method('checkNamedRoute')
            ->with('entity.node.canonical', [
            'node' => 3,
        ], $account)
            ->willReturn($access);
        return $access_manager;
    }
    
    /**
     * Data provider for the access test methods.
     */
    public function accessProvider() {
        return [
            [
                TRUE,
            ],
            [
                FALSE,
            ],
        ];
    }

}