AcMailer\ConfigProvider::__invoke PHP Method

    public function __invoke()
    {
        $moduleConfig = (include __DIR__ . '/../config/module.config.php');
        return ['dependencies' => $moduleConfig['service_manager']];
    }

 public function testInvoke()
 {
     $moduleConfig = (include __DIR__ . '/../config/module.config.php');
     $expectedConfig = ['dependencies' => $moduleConfig['service_manager']];
     $returnedConfig = $this->configProvider->__invoke();
     $this->assertEquals($expectedConfig, $returnedConfig);
 }