| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| import sys |
| import unittest |
| |
| from libcloud.common.types import LazyList |
| |
| |
| class TestLazyList(unittest.TestCase): |
| def setUp(self): |
| super(TestLazyList, self).setUp |
| self._get_more_counter = 0 |
| |
| def tearDown(self): |
| super(TestLazyList, self).tearDown |
| |
| def test_init(self): |
| data = [1, 2, 3, 4, 5] |
| ll = LazyList(get_more=self._get_more_exhausted) |
| ll_list = list(ll) |
| self.assertEqual(ll_list, data) |
| |
| def test_iterator(self): |
| data = [1, 2, 3, 4, 5] |
| ll = LazyList(get_more=self._get_more_exhausted) |
| for i, d in enumerate(ll): |
| self.assertEqual(d, data[i]) |
| |
| def test_empty_list(self): |
| ll = LazyList(get_more=self._get_more_empty) |
| |
| self.assertEqual(list(ll), []) |
| self.assertEqual(len(ll), 0) |
| self.assertTrue(10 not in ll) |
| |
| def test_iterator_not_exhausted(self): |
| data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] |
| ll = LazyList(get_more=self._get_more_not_exhausted) |
| number_of_iterations = 0 |
| for i, d in enumerate(ll): |
| self.assertEqual(d, data[i]) |
| number_of_iterations += 1 |
| self.assertEqual(number_of_iterations, 10) |
| |
| def test_len(self): |
| ll = LazyList(get_more=self._get_more_not_exhausted) |
| ll = LazyList(get_more=self._get_more_not_exhausted) |
| |
| self.assertEqual(len(ll), 10) |
| |
| def test_contains(self): |
| ll = LazyList(get_more=self._get_more_not_exhausted) |
| |
| self.assertTrue(40 not in ll) |
| self.assertTrue(1 in ll) |
| self.assertTrue(5 in ll) |
| self.assertTrue(10 in ll) |
| |
| def test_indexing(self): |
| ll = LazyList(get_more=self._get_more_not_exhausted) |
| |
| self.assertEqual(ll[0], 1) |
| self.assertEqual(ll[9], 10) |
| self.assertEqual(ll[-1], 10) |
| |
| try: |
| ll[11] |
| except IndexError: |
| pass |
| else: |
| self.fail('Exception was not thrown') |
| |
| def test_repr(self): |
| ll1 = LazyList(get_more=self._get_more_empty) |
| ll2 = LazyList(get_more=self._get_more_exhausted) |
| ll3 = LazyList(get_more=self._get_more_not_exhausted) |
| |
| self.assertEqual(repr(ll1), '[]') |
| self.assertEqual(repr(ll2), '[1, 2, 3, 4, 5]') |
| self.assertEqual(repr(ll3), '[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]') |
| |
| def _get_more_empty(self, last_key, value_dict): |
| return [], None, True |
| |
| def _get_more_exhausted(self, last_key, value_dict): |
| data = [1, 2, 3, 4, 5] |
| return data, 5, True |
| |
| def _get_more_not_exhausted(self, last_key, value_dict): |
| self._get_more_counter += 1 |
| if not last_key: |
| data, last_key, exhausted = [1, 2, 3, 4, 5], 5, False |
| else: |
| data, last_key, exhausted = [6, 7, 8, 9, 10], 10, True |
| |
| return data, last_key, exhausted |
| |
| if __name__ == '__main__': |
| sys.exit(unittest.main()) |