Gush\Tests\ConfigTest::testCannotSetInvalidKey PHP Method

    public function testCannotSetInvalidKey()
    {
        $config = $this->createConfig();
        $this->setExpectedException('InvalidArgumentException', 'Invalid configuration, cannot set nested configuration-key "[my_key]"');
        $config->set('[my_key]', '/root', Config::CONFIG_SYSTEM);
    }