示例#1
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 def test_equal_1(self):
     self.assertEqual(push(None, 1).data, 1)
示例#2
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 def test_equal_3(self):
     self.assertEqual(push(Node(1), 2).next.data, 1)
示例#3
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 def test_is_none_1(self):
     self.assertIsNone(push(None, 1).next)
示例#4
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 def test_equal_2(self):
     self.assertEqual(push(Node(1), 2).data, 2)