Elgg\Cache\Pool\StashWrapperTest::testInvalidateComplainsAboutInvalidKeys PHP Method

    public function testInvalidateComplainsAboutInvalidKeys($key)
    {
        $pool = StashWrapper::createEphemeral();
        $this->setExpectedException('PHPUnit_Framework_Error_Warning', 'assert');
        $pool->invalidate($key);
    }