function BlockUiTest::testBlockDemoUiPage

Tests block demo page exists and functions correctly.

File

core/modules/block/tests/src/Functional/BlockUiTest.php, line 97

Class

BlockUiTest

Tests that the block configuration UI exists and stores data correctly.

Namespace

Code

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');
}