1 # Copyright (c) 2010 Google Inc. All rights reserved. 2 # 3 # Redistribution and use in source and binary forms, with or without 4 # modification, are permitted provided that the following conditions are 5 # met: 6 # 7 # * Redistributions of source code must retain the above copyright 8 # notice, this list of conditions and the following disclaimer. 9 # * Redistributions in binary form must reproduce the above 10 # copyright notice, this list of conditions and the following disclaimer 11 # in the documentation and/or other materials provided with the 12 # distribution. 13 # * Neither the name of Google Inc. nor the names of its 14 # contributors may be used to endorse or promote products derived from 15 # this software without specific prior written permission. 16 # 17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29 import unittest 30 31 from webkitpy.common.memoized import memoized 32 33 34 class _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 47 class 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