class BlockUiTest

class BlockUiTest extends BrowserTestBase {
    
    /**
     * Modules to install.
     *
     * @var array
     */
    protected static $modules = [
        'block',
        'block_test',
        'help',
        'condition_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    protected $regions;
    
    /**
     * The submitted block values used by this test.
     *
     * @var array
     */
    protected $blockValues;
    
    /**
     * The block entities used by this test.
     *
     * @var \Drupal\block\BlockInterface[]
     */
    protected $blocks;
    
    /**
     * An administrative user to configure the test environment.
     */
    protected $adminUser;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Create and log in an administrative user.
        $this->adminUser = $this->drupalCreateUser([
            'administer blocks',
            'access administration pages',
        ]);
        $this->drupalLogin($this->adminUser);
        // Enable some test blocks.
        $this->blockValues = [
            [
                'label' => 'Tools',
                'tr' => '6',
                'plugin_id' => 'system_menu_block:tools',
                'settings' => [
                    'region' => 'sidebar_second',
                    'id' => 'tools',
                ],
                'test_weight' => '-1',
            ],
            [
                'label' => 'Powered by Drupal',
                'tr' => '17',
                'plugin_id' => 'system_powered_by_block',
                'settings' => [
                    'region' => 'footer',
                    'id' => 'powered',
                ],
                'test_weight' => '0',
            ],
        ];
        $this->blocks = [];
        foreach ($this->blockValues as $values) {
            $this->blocks[] = $this->drupalPlaceBlock($values['plugin_id'], $values['settings']);
        }
    }
    
    /**
     * Tests block demo page exists and functions correctly.
     */
    public function testBlockDemoUiPage() : void {
        $this->drupalPlaceBlock('help_block', [
            'region' => 'help',
        ]);
        $this->drupalGet('admin/structure/block');
        $this->clickLink('Demonstrate block regions (Stark)');
        $this->assertSession()
            ->elementExists('xpath', '//header[@role = "banner"]/div/div[contains(@class, "block-region") and contains(text(), "Header")]');
        // Ensure that other themes can use the block demo page.
        \Drupal::service('theme_installer')->install([
            'test_theme',
        ]);
        $this->drupalGet('admin/structure/block/demo/test_theme');
        $this->assertSession()
            ->assertEscaped('<strong>Test theme</strong>');
        // Ensure that a hidden theme cannot use the block demo page.
        \Drupal::service('theme_installer')->install([
            'stable9',
        ]);
        $this->drupalGet('admin/structure/block/demo/stable9');
        $this->assertSession()
            ->statusCodeEquals(404);
        // Delete all blocks and verify saving the block layout results in a
        // validation error.
        $block_storage = \Drupal::service('entity_type.manager')->getStorage('block');
        $blocks = $block_storage->loadMultiple();
        foreach ($blocks as $block) {
            $block->delete();
        }
        $this->drupalGet('admin/structure/block');
        $blocks_table = $this->xpath("//tr[@class='block-enabled']");
        $this->assertEmpty($blocks_table, 'The blocks table is now empty.');
        $this->submitForm([], 'Save blocks');
        $this->assertSession()
            ->pageTextContains('No blocks settings to update');
    }
    
    /**
     * Tests block admin page exists and functions correctly.
     */
    public function testBlockAdminUiPage() : void {
        // Visit the blocks admin ui.
        $this->drupalGet('admin/structure/block');
        // Look for the blocks table.
        $this->assertSession()
            ->elementExists('xpath', "//table[@id='blocks']");
        // Look for test blocks in the table.
        foreach ($this->blockValues as $delta => $values) {
            $block = $this->blocks[$delta];
            $label = $block->label();
            $this->assertSession()
                ->elementTextEquals('xpath', '//*[@id="blocks"]/tbody/tr[' . $values['tr'] . ']/td[1]/text()', $label);
            // Look for a test block region select form element.
            $this->assertSession()
                ->fieldExists('blocks[' . $values['settings']['id'] . '][region]');
            // Move the test block to the header region.
            $edit['blocks[' . $values['settings']['id'] . '][region]'] = 'header';
            // Look for a test block weight select form element.
            $this->assertSession()
                ->fieldExists('blocks[' . $values['settings']['id'] . '][weight]');
            // Change the test block's weight.
            $edit['blocks[' . $values['settings']['id'] . '][weight]'] = $values['test_weight'];
        }
        $this->drupalGet('admin/structure/block');
        $this->submitForm($edit, 'Save blocks');
        foreach ($this->blockValues as $values) {
            // Check if the region and weight settings changes have persisted.
            $this->assertTrue($this->assertSession()
                ->optionExists('edit-blocks-' . $values['settings']['id'] . '-region', 'header')
                ->isSelected());
            $this->assertTrue($this->assertSession()
                ->optionExists('edit-blocks-' . $values['settings']['id'] . '-weight', $values['test_weight'])
                ->isSelected());
        }
        // Add a block with a machine name the same as a region name.
        $this->drupalPlaceBlock('system_powered_by_block', [
            'region' => 'header',
            'id' => 'header',
        ]);
        $this->drupalGet('admin/structure/block');
        $this->assertSession()
            ->elementExists('xpath', '//tr[contains(@class, "region-title-header")]');
        // Ensure hidden themes do not appear in the UI. Enable another non base
        // theme and place the local tasks block.
        $this->assertTrue(\Drupal::service('theme_handler')->themeExists('stark'), 'The stark base theme is enabled');
        $this->drupalPlaceBlock('local_tasks_block', [
            'region' => 'header',
            'theme' => 'stark',
        ]);
        // We have to enable at least one extra theme that is not hidden so that
        // local tasks will show up. That's why we enable test_theme_theme.
        \Drupal::service('theme_installer')->install([
            'stable9',
            'test_theme_theme',
        ]);
        $this->drupalGet('admin/structure/block');
        $theme_handler = \Drupal::service('theme_handler');
        $this->assertSession()
            ->linkExists($theme_handler->getName('stark'));
        $this->assertSession()
            ->linkExists($theme_handler->getName('test_theme_theme'));
        $this->assertSession()
            ->linkNotExists($theme_handler->getName('stable9'));
        // Ensure that a hidden theme cannot use the block demo page.
        $this->drupalGet('admin/structure/block/list/stable9');
        $this->assertSession()
            ->statusCodeEquals(404);
        // Ensure that a hidden theme set as the admin theme can use the block demo
        // page.
        \Drupal::configFactory()->getEditable('system.theme')
            ->set('admin', 'stable9')
            ->save();
        \Drupal::service('router.builder')->rebuildIfNeeded();
        $this->drupalPlaceBlock('local_tasks_block', [
            'region' => 'header',
            'theme' => 'stable9',
        ]);
        $this->drupalGet('admin/structure/block');
        $this->assertSession()
            ->linkExists($theme_handler->getName('stable9'));
        $this->drupalGet('admin/structure/block/list/stable9');
        $this->assertSession()
            ->statusCodeEquals(200);
    }
    
    /**
     * Tests the block categories on the listing page.
     */
    public function testCandidateBlockList() : void {
        $this->drupalGet('admin/structure/block');
        $this->clickLink('Place block');
        $this->assertSession()
            ->elementExists('xpath', '//tr[.//td/div[text()="Display message"] and .//td[text()="Block test"] and .//td//a[contains(@href, "admin/structure/block/add/test_block_instantiation/stark")]]');
        // Trigger the custom category addition in block_test_block_alter().
        $this->container
            ->get('state')
            ->set('block_test_info_alter', TRUE);
        $this->container
            ->get('plugin.manager.block')
            ->clearCachedDefinitions();
        $this->drupalGet('admin/structure/block');
        $this->clickLink('Place block');
        $this->assertSession()
            ->elementExists('xpath', '//tr[.//td/div[text()="Display message"] and .//td[text()="Custom category"] and .//td//a[contains(@href, "admin/structure/block/add/test_block_instantiation/stark")]]');
    }
    
    /**
     * Tests the behavior of unsatisfied context-aware blocks.
     */
    public function testContextAwareUnsatisfiedBlocks() : void {
        $this->drupalGet('admin/structure/block');
        $this->clickLink('Place block');
        // Verify that the context-aware test block does not appear.
        $this->assertSession()
            ->elementNotExists('xpath', '//tr[.//td/div[text()="Test context-aware unsatisfied block"] and .//td[text()="Block test"] and .//td//a[contains(@href, "admin/structure/block/add/test_context_aware_unsatisfied/stark")]]');
        $definition = \Drupal::service('plugin.manager.block')->getDefinition('test_context_aware_unsatisfied');
        $this->assertNotEmpty($definition, 'The context-aware test block does not exist.');
    }
    
    /**
     * Tests the behavior of context-aware blocks.
     */
    public function testContextAwareBlocks() : void {
        $expected_text = '<div id="test_context_aware--username">' . \Drupal::currentUser()->getAccountName() . '</div>';
        $this->drupalGet('');
        $this->assertSession()
            ->pageTextNotContains('Test context-aware block');
        $this->assertSession()
            ->responseNotContains($expected_text);
        $block_url = 'admin/structure/block/add/test_context_aware/stark';
        $this->drupalGet('admin/structure/block');
        $this->clickLink('Place block');
        $this->assertSession()
            ->elementExists('xpath', '//tr[.//td/div[text()="Test context-aware block"] and .//td[text()="Block test"] and .//td//a[contains(@href, "' . $block_url . '")]]');
        $definition = \Drupal::service('plugin.manager.block')->getDefinition('test_context_aware');
        $this->assertNotEmpty($definition, 'The context-aware test block exists.');
        $edit = [
            'region' => 'content',
            'settings[context_mapping][user]' => '@block_test.multiple_static_context:userB',
        ];
        $this->drupalGet($block_url);
        $this->submitForm($edit, 'Save block');
        $this->drupalGet('');
        $this->assertSession()
            ->pageTextContains('Test context-aware block');
        $this->assertSession()
            ->pageTextContains('User context found.');
        $this->assertSession()
            ->responseContains($expected_text);
        // Test context mapping form element is not visible if there are no valid
        // context options for the block (the test_context_aware_no_valid_context_options
        // block has one context defined which is not available for it on the
        // Block Layout interface).
        $this->drupalGet('admin/structure/block/add/test_context_aware_no_valid_context_options/stark');
        $this->assertSession()
            ->fieldNotExists('edit-settings-context-mapping-email');
        // Test context mapping allows empty selection for optional contexts.
        $this->drupalGet('admin/structure/block/manage/stark_testcontextawareblock');
        $edit = [
            'settings[context_mapping][user]' => '',
        ];
        $this->submitForm($edit, 'Save block');
        $this->drupalGet('');
        $this->assertSession()
            ->pageTextContains('No context mapping selected.');
        $this->assertSession()
            ->pageTextNotContains('User context found.');
        // Tests that conditions with missing context are not displayed.
        $this->drupalGet('admin/structure/block/manage/stark_testcontextawareblock');
        $this->assertSession()
            ->responseNotContains('No existing type');
        $this->assertSession()
            ->elementNotExists('xpath', '//*[@name="visibility[condition_test_no_existing_type][negate]"]');
    }
    
    /**
     * Tests that the BlockForm populates machine name correctly.
     */
    public function testMachineNameSuggestion() : void {
        // Check the form uses the raw machine name suggestion when no instance
        // already exists.
        $url = 'admin/structure/block/add/test_block_instantiation/stark';
        $this->drupalGet($url);
        $this->assertSession()
            ->fieldValueEquals('id', 'stark_displaymessage');
        $edit = [
            'region' => 'content',
        ];
        $this->drupalGet($url);
        $this->submitForm($edit, 'Save block');
        $this->assertSession()
            ->pageTextContains('The block configuration has been saved.');
        // Now, check to make sure the form starts by auto-incrementing correctly.
        $this->drupalGet($url);
        $this->assertSession()
            ->fieldValueEquals('id', 'stark_displaymessage_2');
        $this->drupalGet($url);
        $this->submitForm($edit, 'Save block');
        $this->assertSession()
            ->pageTextContains('The block configuration has been saved.');
        // And verify that it continues working beyond just the first two.
        $this->drupalGet($url);
        $this->assertSession()
            ->fieldValueEquals('id', 'stark_displaymessage_3');
    }
    
    /**
     * Tests the block placement indicator.
     */
    public function testBlockPlacementIndicator() : void {
        // Test the block placement indicator with using the domain as URL language
        // indicator. This causes destination query parameters to be absolute URLs.
        \Drupal::service('module_installer')->install([
            'language',
            'locale',
        ]);
        $this->container = \Drupal::getContainer();
        ConfigurableLanguage::createFromLangcode('it')->save();
        $config = $this->config('language.types');
        $config->set('negotiation.language_interface.enabled', [
            LanguageNegotiationUrl::METHOD_ID => -10,
        ]);
        $config->save();
        $config = $this->config('language.negotiation');
        $config->set('url.source', LanguageNegotiationUrl::CONFIG_DOMAIN);
        $config->set('url.domains', [
            'en' => \Drupal::request()->getHost(),
            'it' => 'it.example.com',
        ]);
        $config->save();
        // Select the 'Powered by Drupal' block to be placed.
        $block = [];
        $block['id'] = $this->randomMachineName();
        $block['theme'] = 'stark';
        $block['region'] = 'content';
        // After adding a block, it will indicate which block was just added.
        $this->drupalGet('admin/structure/block/add/system_powered_by_block');
        $this->submitForm($block, 'Save block');
        $this->assertSession()
            ->addressEquals('admin/structure/block/list/stark?block-placement=' . Html::getClass($block['id']));
        // Resaving the block page will remove the block placement indicator.
        $this->submitForm([], 'Save blocks');
        $this->assertSession()
            ->addressEquals('admin/structure/block/list/stark');
        // Place another block and test the remove functionality works with the
        // block placement indicator. Click the first 'Place block' link to bring up
        // the list of blocks to place in the first available region.
        $this->clickLink('Place block');
        // Select the first available block, which is the 'test_xss_title' plugin,
        // with a default machine name 'scriptalertxsssubjectscript' that is used
        // for the 'block-placement' querystring parameter.
        $this->clickLink('Place block');
        $this->submitForm([], 'Save block');
        $this->assertSession()
            ->addressEquals('admin/structure/block/list/stark?block-placement=stark-scriptalertxsssubjectscript');
        // Removing a block will remove the block placement indicator.
        $this->clickLink('Remove');
        $this->submitForm([], 'Remove');
        // @todo https://www.drupal.org/project/drupal/issues/2980527 this should be
        //   'admin/structure/block/list/stark' but there is a bug.
        $this->assertSession()
            ->addressEquals('admin/structure/block');
    }
    
    /**
     * Tests if validation errors are passed plugin form to the parent form.
     */
    public function testBlockValidateErrors() : void {
        $this->drupalGet('admin/structure/block/add/test_settings_validation/stark');
        $this->submitForm([
            'region' => 'content',
            'settings[digits]' => 'abc',
        ], 'Save block');
        $this->assertSession()
            ->statusMessageContains('Only digits are allowed', 'error');
        $this->assertSession()
            ->elementExists('xpath', '//div[contains(@class,"form-item-settings-digits")]/input[contains(@class,"error")]');
    }
    
    /**
     * Tests that the enable/disable routes are protected from CSRF.
     */
    public function testRouteProtection() : void {
        // Get the first block generated in our setUp method.
        
        /** @var \Drupal\block\BlockInterface $block */
        $block = reset($this->blocks);
        // Ensure that the enable and disable routes are protected.
        $this->drupalGet('admin/structure/block/manage/' . $block->id() . '/disable');
        $this->assertSession()
            ->statusCodeEquals(403);
        $this->drupalGet('admin/structure/block/manage/' . $block->id() . '/enable');
        $this->assertSession()
            ->statusCodeEquals(403);
    }
    
    /**
     * Tests that users without permission are not able to view broken blocks.
     */
    public function testBrokenBlockVisibility() : void {
        $assert_session = $this->assertSession();
        $block = $this->drupalPlaceBlock('broken');
        // Ensure that broken block configuration can be accessed.
        $this->drupalGet('admin/structure/block/manage/' . $block->id());
        $assert_session->statusCodeEquals(200);
        // Login as an admin user to the site.
        $this->drupalLogin($this->adminUser);
        $this->drupalGet('');
        $assert_session->statusCodeEquals(200);
        // Check that this user can view the Broken Block message.
        $assert_session->pageTextContains('This block is broken or missing. You may be missing content or you might need to install the original module.');
        $this->drupalLogout();
        // Visit the same page as anonymous.
        $this->drupalGet('');
        $assert_session->statusCodeEquals(200);
        // Check that this user cannot view the Broken Block message.
        $assert_session->pageTextNotContains('This block is broken or missing. You may be missing content or you might need to install the original module.');
        // Visit same page as an authorized user that does not have access to
        // administer blocks.
        $this->drupalLogin($this->drupalCreateUser([
            'access administration pages',
        ]));
        $this->drupalGet('');
        $assert_session->statusCodeEquals(200);
        // Check that this user cannot view the Broken Block message.
        $assert_session->pageTextNotContains('This block is broken or missing. You may be missing content or you might need to install the original module.');
    }

}