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import sys


global_log = []


def clear_global_log(func):
    def wrapper(*args, **kwargs):
        del global_log[:]
        return func(*args, **kwargs)
    return wrapper


class Meta(type):
    def __prepare__(*args, **kwargs):
        global_log.append(["__prepare__", args, kwargs])
        return type.__prepare__(*args, **kwargs)

    def __new__(*args, **kwargs):
        global_log.append(["__new__", args, kwargs])
        return type.__new__(*args, **kwargs)

    def __init__(*args, **kwargs):
        global_log.append(["__init__", args, kwargs])
        return type.__init__(*args, **kwargs)

    def __call__(*args, **kwargs):
        global_log.append(["__call__", args, kwargs])
        return type.__call__(*args, **kwargs)


@clear_global_log
def test_class_construction():
    class Foo(metaclass=Meta):
        pass
    Foo()
    assert global_log[0] == ["__prepare__", ("Foo", tuple()), {}]

    initial_dict = {'__qualname__': 'test_class_construction.<locals>.Foo', '__module__': 'tests.test_metaclass'}
    # if sys.implementation.name == "graalpy":
    #     initial_dict = {
    #         '__module__': 'test_metaclass'
    #     }
    assert global_log[1] == ["__new__", (Meta, "Foo", tuple(), initial_dict), {}]
    assert global_log[2] == ["__init__", (Foo, "Foo", tuple(), initial_dict), {}]
    assert global_log[3] == ["__call__", (Foo,), {}]


@clear_global_log
def test_metaclass_methods():
    class MyMeta(type):
        def __new__(meta, name, bases, dct):
            global_log.append(["__new__", meta, name, bases, dct])
            return super(MyMeta, meta).__new__(meta, name, bases, dct)

        def __init__(cls, name, bases, dct):
            global_log.append(["__init__", cls, name, bases, dct])
            super(MyMeta, cls).__init__(name, bases, dct)

        def __call__(cls, *args, **kwds):
            global_log.append(["__call__", cls, args, kwds])
            return type.__call__(cls, *args, **kwds)

        def a_method(cls, arg):
            return cls, arg

    class MyClass(metaclass=MyMeta):
        def __init__(self, a, b):
            global_log.append(["MyKlass object", a, b])

    assert isinstance(MyClass, MyMeta)
    ns_dict = {
        '__qualname__': 'test_metaclass_methods.<locals>.MyClass',
        '__init__': MyClass.__init__,
        '__module__': 'tests.test_metaclass'
    }
    # if sys.implementation.name == "graalpy":
    #     ns_dict = {
    #         '__init__': MyClass.__init__,
    #         '__module__': 'test_metaclass',
    #     }
    assert len(global_log) == 2
    assert global_log[0] == ["__new__", MyMeta, "MyClass", (), ns_dict]
    assert global_log[1] == ["__init__", MyClass, "MyClass", (), ns_dict]

    assert MyClass.a_method(10) == (MyClass, 10)
    m = MyClass(1, 2)
    assert isinstance(m, MyClass)
    assert len(global_log) == 4
    assert global_log[2] == ['__call__', MyClass, (1, 2), {}]
    assert global_log[3] == ['MyKlass object', 1, 2]


class A:
    class B:
        pass


def test_nested_class():
    assert A.__name__ == "A"
    assert A.__qualname__ == "A"
    assert A.__module__ == __name__, "should be '%s' but was '%s'" % (__name__, A.__module__)
    assert A.B.__name__ == "B"
    assert A.B.__qualname__ == "A.B"
    assert A.B.__module__ == __name__
