addTheme example

$this->assertEquals('core/themes/stark/stark.info.yml', $info->getPathname());
    $this->assertEquals('core/themes/stark/stark.theme', $info->getExtensionPathname());

  }

  /** * Tests empty libraries in theme.info.yml file. */
  public function testThemeLibrariesEmpty() {
    $theme = new Extension($this->root, 'theme', 'core/modules/system/tests/themes/test_theme_libraries_empty', 'test_theme_libraries_empty.info.yml');
    try {
      $this->themeHandler->addTheme($theme);
      $this->assertTrue(TRUE, 'Empty libraries key in theme.info.yml does not cause PHP warning');
    }
    catch (\Exception $e) {
      $this->fail('Empty libraries key in theme.info.yml causes PHP warning.');
    }
  }

}

/** * Extends the default theme handler to mock some drupal_ methods. */