Tests that drupal_get_filename() works when the file is not in database.
function testDrupalGetFilename() {
// Assert that the test is meaningful by making sure the keyvalue service
// does not exist.
$this
->assertFalse(drupal_container()
->has('keyvalue'), 'The container has no keyvalue service.');
// Retrieving the location of a module.
$this
->assertIdentical(drupal_get_filename('module', 'php'), 'core/modules/php/php.module', 'Retrieve module location.');
// Retrieving the location of a theme.
$this
->assertIdentical(drupal_get_filename('theme', 'stark'), 'core/themes/stark/stark.info', 'Retrieve theme location.');
// Retrieving the location of a theme engine.
$this
->assertIdentical(drupal_get_filename('theme_engine', 'phptemplate'), 'core/themes/engines/phptemplate/phptemplate.engine', 'Retrieve theme engine location.');
// Retrieving the location of a profile. Profiles are a special case with
// a fixed location and naming.
$this
->assertIdentical(drupal_get_filename('profile', 'standard'), 'core/profiles/standard/standard.profile', 'Retrieve installation profile location.');
// When a file is not found in the database cache, drupal_get_filename()
// searches several locations on the filesystem, including the core/
// directory. We use the '.script' extension below because this is a
// non-existent filetype that will definitely not exist in the database.
// Since there is already a core/scripts directory, drupal_get_filename()
// will automatically check there for 'script' files, just as it does
// for (e.g.) 'module' files in core/modules.
$this
->assertIdentical(drupal_get_filename('script', 'test'), 'core/scripts/test/test.script');
}