def METHOD_NAME(self):
    class myhashable(object):
        def __init__(self):
            self.hashcalls = 0
        def __hash__(self):
            self.hashcalls += 1
            return 42
        def __eq__(self, other):
            return type(self) == type(other)
    test = (myhashable(), myhashable(), myhashable())
    hash(test)
    self.assertEqual(test[0].hashcalls, 1)
    self.assertEqual(test[1].hashcalls, 1)
    self.assertEqual(test[2].hashcalls, 1)