class DrupalAttributesUnitTest extends DrupalUnitTestCase {
  public static function getInfo() {
    return array(
      'name' => 'HTML Attributes',
      'description' => 'Perform unit tests on the drupal_attributes() function.',
      'group' => 'System',
    );
  }

  /**
   * Tests that drupal_html_class() cleans the class name properly.
   */
  function testDrupalAttributes() {
    // Verify that special characters are HTML encoded.
    $this->assertIdentical(drupal_attributes(array('title' => '&"\'<>')), ' title="&amp;&quot;&#039;&lt;&gt;"', 'HTML encode attribute values.');

    // Verify multi-value attributes are concatenated with spaces.
    $attributes = array('class' => array('first', 'last'));
    $this->assertIdentical(drupal_attributes(array('class' => array('first', 'last'))), ' class="first last"', 'Concatenate multi-value attributes.');

    // Verify empty attribute values are rendered.
    $this->assertIdentical(drupal_attributes(array('alt' => '')), ' alt=""', 'Empty attribute value #1.');
    $this->assertIdentical(drupal_attributes(array('alt' => NULL)), ' alt=""', 'Empty attribute value #2.');

    // Verify multiple attributes are rendered.
    $attributes = array(
      'id' => 'id-test',
      'class' => array('first', 'last'),
      'alt' => 'Alternate',
    );
    $this->assertIdentical(drupal_attributes($attributes), ' id="id-test" class="first last" alt="Alternate"', 'Multiple attributes.');

    // Verify empty attributes array is rendered.
    $this->assertIdentical(drupal_attributes(array()), '', 'Empty attributes array.');
  }
}