nopolabs / mock-with-expectations

    {

        $reflection = new ReflectionClass($className);

        if ($reflection->isInterface()) {

            $publicMethods = array_map(function (ReflectionMethod $method) {

                return $method->name;

            }, $reflection->getMethods(ReflectionMethod::IS_PUBLIC));

            return array_diff($publicMethods, $methods);

        }

        if ($reflection->isAbstract()) {

            $abstractMethods = array_map(function(ReflectionMethod $method) {

            return array_diff($publicMethods, $methods);

        }

        if ($reflection->isAbstract()) {

            $abstractMethods = array_map(function(ReflectionMethod $method) {

                return $method->name;

            }, $reflection->getMethods(ReflectionMethod::IS_ABSTRACT));

            return array_diff($abstractMethods, $methods);

        }

        return [];

    }