public function GetRdfNamespacesTest::testGetRdfNamespaces in Drupal 9

Same name and namespace in other branches

1. 8 core/modules/rdf/tests/src/Functional/GetRdfNamespacesTest.php \Drupal\Tests\rdf\Functional\GetRdfNamespacesTest::testGetRdfNamespaces()

Tests getting RDF namespaces.

File

core/modules/rdf/tests/src/Functional/GetRdfNamespacesTest.php, line 29

Class

GetRdfNamespacesTest

Tests hook_rdf_namespaces().

Namespace

Drupal\Tests\rdf\Functional

Code

public function testGetRdfNamespaces() {

  // Fetches the front page and extracts RDFa 1.1 prefixes.
  $this
    ->drupalGet('');

  // We have to use the find() method on the driver directly because //html is
  // prepended to all xpath queries otherwise.
  $driver = $this
    ->getSession()
    ->getDriver();
  $element = $driver
    ->find('//html[contains(@prefix, "rdfs: http://www.w3.org/2000/01/rdf-schema#")]');
  $this
    ->assertCount(1, $element, 'A prefix declared once is displayed.');
  $element = $driver
    ->find('//html[contains(@prefix, "foaf: http://xmlns.com/foaf/0.1/")]');
  $this
    ->assertCount(1, $element, 'The same prefix declared in several implementations of hook_rdf_namespaces() is valid as long as all the namespaces are the same.');
  $element = $driver
    ->find('//html[contains(@prefix, "foaf1: http://xmlns.com/foaf/0.1/")]');
  $this
    ->assertCount(1, $element, 'Two prefixes can be assigned the same namespace.');
  $element = $driver
    ->find('//html[contains(@prefix, "dc: http://purl.org/dc/terms/")]');
  $this
    ->assertCount(1, $element, 'When a prefix has conflicting namespaces, the first declared one is used.');

  // Get all RDF namespaces.
  $ns = rdf_get_namespaces();
  $this
    ->assertEquals('http://www.w3.org/2000/01/rdf-schema#', $ns['rdfs'], 'A prefix declared once is included.');
  $this
    ->assertEquals('http://xmlns.com/foaf/0.1/', $ns['foaf'], 'The same prefix declared in several implementations of hook_rdf_namespaces() is valid as long as all the namespaces are the same.');
  $this
    ->assertEquals('http://xmlns.com/foaf/0.1/', $ns['foaf1'], 'Two prefixes can be assigned the same namespace.');

  // Enable rdf_conflicting_namespaces to ensure that an exception is thrown
  // when RDF namespaces are conflicting.
  \Drupal::service('module_installer')
    ->install([
    'rdf_conflicting_namespaces',
  ], TRUE);
  try {
    $ns = rdf_get_namespaces();
    $this
      ->fail('Expected exception not thrown for conflicting namespace declaration.');
  } catch (\Exception $e) {

    // Expected exception; just continue testing.
  }
}