test_builtins.py 文件源码

def test_min(self):
        self.assertEqual(min('123123'), '1')
        self.assertEqual(min(1, 2, 3), 1)
        self.assertEqual(min((1, 2, 3, 1, 2, 3)), 1)
        self.assertEqual(min([1, 2, 3, 1, 2, 3]), 1)

        self.assertEqual(min(1, 2, 3.0), 1)
        self.assertEqual(min(1, 2.0, 3), 1)
        self.assertEqual(min(1.0, 2, 3), 1.0)

        self.assertRaises(TypeError, min)
        self.assertRaises(TypeError, min, 42)
        self.assertRaises(ValueError, min, ())
        class BadSeq:
            def __getitem__(self, index):
                raise ValueError
        self.assertRaises(ValueError, min, BadSeq())

        for stmt in (
            "min(key=int)",                 # no args
            "min(1, key=int)",              # single arg not iterable
            "min(1, 2, keystone=int)",      # wrong keyword
            "min(1, 2, key=int, abc=int)",  # two many keywords
            "min(1, 2, key=1)",             # keyfunc is not callable
            ):
            try:
                exec_(stmt, globals())
            except TypeError:
                pass
            else:
                self.fail(stmt)

        self.assertEqual(min((1,), key=neg), 1)     # one elem iterable
        self.assertEqual(min((1,2), key=neg), 2)    # two elem iterable
        self.assertEqual(min(1, 2, key=neg), 2)     # two elems

        data = [random.randrange(200) for i in range(100)]
        keys = dict((elem, random.randrange(50)) for elem in data)
        f = keys.__getitem__
        self.assertEqual(min(data, key=f),
                         sorted(data, key=f)[0])