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from sympy.core.cache import cacheit


def test_cacheit_doc():
    @cacheit
    def testfn():
        "test docstring"
        pass

    assert testfn.__doc__ == "test docstring"
    assert testfn.__name__ == "testfn"

def test_cacheit_unhashable():
    @cacheit
    def testit(x):
        return x

    assert testit(1) == 1
    assert testit(1) == 1
    a = {}
    assert testit(a) == {}
    a[1] = 2
    assert testit(a) == {1: 2}