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<?php
namespace Drupal\rdf\Tests;
use Drupal\simpletest\WebTestBase;
/**
* Confirm that the serialization of RDF namespaces in present in the HTML
* markup.
*
* @group rdf
*/
class GetNamespacesTest extends WebTestBase {
/**
* Modules to enable.
*
* @var array
*/
public static $modules = ['rdf', 'rdf_test_namespaces'];
/**
* Tests RDF namespaces.
*/
public function testGetRdfNamespaces() {
// Fetches the front page and extracts RDFa 1.1 prefixes.
$this->drupalGet('');
$element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', [
':prefix_binding' => 'rdfs: http://www.w3.org/2000/01/rdf-schema#',
]);
$this->assertTrue(!empty($element), 'A prefix declared once is displayed.');
$element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', [
':prefix_binding' => 'foaf: http://xmlns.com/foaf/0.1/',
]);
$this->assertTrue(!empty($element), 'The same prefix declared in several implementations of hook_rdf_namespaces() is valid as long as all the namespaces are the same.');
$element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', [
':prefix_binding' => 'foaf1: http://xmlns.com/foaf/0.1/',
]);
$this->assertTrue(!empty($element), 'Two prefixes can be assigned the same namespace.');
$element = $this->xpath('//html[contains(@prefix, :prefix_binding)]', [
':prefix_binding' => 'dc: http://purl.org/dc/terms/',
]);
$this->assertTrue(!empty($element), 'When a prefix has conflicting namespaces, the first declared one is used.');
}
}