| # Copyright (c) 2010 Google Inc. All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: |
| # |
| # * Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # * Redistributions in binary form must reproduce the above |
| # copyright notice, this list of conditions and the following disclaimer |
| # in the documentation and/or other materials provided with the |
| # distribution. |
| # * Neither the name of Google Inc. nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| import unittest |
| |
| from blinkpy.common.memoized import memoized |
| |
| |
| class _TestObject(object): |
| def __init__(self): |
| self.call_count = 0 |
| |
| @memoized |
| def memoized_add_one(self, argument): |
| self.call_count += 1 |
| return argument + 1 |
| |
| @memoized |
| def memoized_subtract_one(self, argument): |
| self.call_count += 1 |
| return argument - 1 |
| |
| |
| class MemoizedTest(unittest.TestCase): |
| def test_multiple_identical_calls(self): |
| # When a function is called multiple times with identical arguments, |
| # the call count doesn't increase past 1. |
| test = _TestObject() |
| self.assertEqual(test.memoized_add_one(1), 2) |
| self.assertEqual(test.memoized_add_one(1), 2) |
| self.assertEqual(test.call_count, 1) |
| |
| def test_different_calls(self): |
| # Validate that call_count is working as expected. |
| test = _TestObject() |
| self.assertEqual(test.memoized_add_one(1), 2) |
| self.assertEqual(test.memoized_add_one(2), 3) |
| self.assertEqual(test.call_count, 2) |
| |
| def test_reassign_function(self): |
| # The function can be assigned to a different variable. |
| test = _TestObject() |
| add_one = test.memoized_add_one |
| self.assertEqual(add_one(4), 5) |
| self.assertEqual(test.call_count, 1) |
| |
| def test_cache_clear(self): |
| test = _TestObject() |
| self.assertEqual(test.memoized_add_one(1), 2) |
| self.assertEqual(test.memoized_subtract_one(2), 1) |
| self.assertEqual(test.call_count, 2) |
| |
| # Now clear the cache of memoized_add_one. This should only clear the |
| # cache for that function. |
| test.memoized_add_one.cache_clear() |
| |
| self.assertEqual(test.memoized_subtract_one(2), 1) |
| self.assertEqual(test.call_count, 2) |
| |
| self.assertEqual(test.memoized_add_one(1), 2) |
| self.assertEqual(test.call_count, 3) |
| |
| def test_non_hashable_args(self): |
| test = _TestObject() |
| try: |
| test.memoized_add_one([]) |
| self.fail('Expected TypeError.') |
| except TypeError as error: |
| self.assertEqual( |
| error.message, |
| 'Cannot call memoized function memoized_add_one with ' |
| 'unhashable arguments: unhashable type: \'list\'') |
