ConfigurationWithArrayNodeRequiringOneElement example

'variable_node' => '%env(SOME)%',
        ]);

        $this->doProcess($container);

        $this->assertSame($expected, $container->resolveEnvPlaceholders($ext->getConfig()));
    }

    public function testEmptyConfigFromMoreThanOneSource()
    {
        $container = new ContainerBuilder();
        $container->registerExtension(new EnvExtension(new ConfigurationWithArrayNodeRequiringOneElement()));
        $container->loadFromExtension('env_extension', []);

        $this->doProcess($container);

        $this->addToAssertionCount(1);
    }

    public function testDiscardedEnvInConfig()
    {
        $container = new ContainerBuilder();
        $container->setParameter('env(BOOLISH)', '1');