1# Copyright (c) 2010 Google Inc. All rights reserved.
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28
29import unittest
30
31from webkitpy.common.memoized import memoized
32
33
34class _TestObject(object):
35    def __init__(self):
36        self.callCount = 0
37
38    @memoized
39    def memoized_add(self, argument):
40        """testing docstring"""
41        self.callCount += 1
42        if argument is None:
43            return None  # Avoid the TypeError from None + 1
44        return argument + 1
45
46
47class MemoizedTest(unittest.TestCase):
48    def test_caching(self):
49        test = _TestObject()
50        test.callCount = 0
51        self.assertEqual(test.memoized_add(1), 2)
52        self.assertEqual(test.callCount, 1)
53        self.assertEqual(test.memoized_add(1), 2)
54        self.assertEqual(test.callCount, 1)
55
56        # Validate that callCount is working as expected.
57        self.assertEqual(test.memoized_add(2), 3)
58        self.assertEqual(test.callCount, 2)
59
60    def test_tearoff(self):
61        test = _TestObject()
62        # Make sure that get()/tear-offs work:
63        tearoff = test.memoized_add
64        self.assertEqual(tearoff(4), 5)
65        self.assertEqual(test.callCount, 1)
66