2 # Copyright 2020 The Pigweed Authors
4 # Licensed under the Apache License, Version 2.0 (the "License"); you may not
5 # use this file except in compliance with the License. You may obtain a copy of
8 # https://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 # License for the specific language governing permissions and limitations under
15 """Tests for general purpose tools."""
19 from pw_presubmit import tools
22 class FlattenTest(unittest.TestCase):
23 """Tests the flatten function, which flattens iterables."""
25 self.assertEqual([], list(tools.flatten()))
26 self.assertEqual([], list(tools.flatten([])))
27 self.assertEqual([], list(tools.flatten([], ())))
28 self.assertEqual([], list(tools.flatten([[], (), [[]]], ((), []))))
30 def test_no_nesting(self):
31 self.assertEqual(['a', 'bcd', 123, 45.6],
32 list(tools.flatten('a', 'bcd', 123, 45.6)))
33 self.assertEqual(['a', 'bcd', 123, 45.6],
34 list(tools.flatten(['a', 'bcd', 123, 45.6])))
35 self.assertEqual(['a', 'bcd', 123, 45.6],
36 list(tools.flatten(['a', 'bcd'], [123, 45.6])))
38 def test_nesting(self):
39 self.assertEqual(['a', 'bcd', 123, 45.6],
40 list(tools.flatten('a', ['bcd'], [123], 45.6)))
41 self.assertEqual(['a', 'bcd', 123, 45.6],
42 list(tools.flatten([['a', ('bcd', [123])], 45.6])))
43 self.assertEqual(['a', 'bcd', 123, 45.6],
44 list(tools.flatten([('a', 'bcd')],
48 if __name__ == '__main__':