/**
* Creates the cache ID for a renderable element.
*
* Creates the cache ID string based on #cache['keys'] + #cache['contexts'].
*
* @param array $elements
* A renderable array.
*
* @return string
* The cache ID string, or FALSE if the element may not be cached.
*/
protected function createCacheID(array $elements)
{
// If the maximum age is zero, then caching is effectively prohibited.
if (isset($elements['#cache']['max-age']) && $elements['#cache']['max-age'] === 0) {
return FALSE;
}
if (isset($elements['#cache']['keys'])) {
$cid_parts = $elements['#cache']['keys'];
if (!empty($elements['#cache']['contexts'])) {
$contexts = $this->cacheContextsManager->convertTokensToKeys($elements['#cache']['contexts']);
$cid_parts = array_merge($cid_parts, $contexts);
}
return implode(':', $cid_parts);
}
return FALSE;
}
/**
* @covers ::validateTokens
*
* @dataProvider validateTokensProvider
*/
public function testValidateContexts(array $contexts, $expected_exception_message)
{
$container = new ContainerBuilder();
$cache_contexts_manager = new CacheContextsManager($container, ['foo', 'foo.bar', 'baz']);
if ($expected_exception_message !== FALSE) {
$this->setExpectedException('LogicException', $expected_exception_message);
}
// If it doesn't throw an exception, validateTokens() returns NULL.
$this->assertNull($cache_contexts_manager->validateTokens($contexts));
}
