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#!/usr/bin/env python3
# Copyright 2020 The Pigweed Authors
#
# Licensed 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
#
# https://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.
"""Tests for general purpose tools."""
import unittest
from pw_presubmit import tools
class FlattenTest(unittest.TestCase):
"""Tests the flatten function, which flattens iterables."""
def test_empty(self):
self.assertEqual([], list(tools.flatten()))
self.assertEqual([], list(tools.flatten([])))
self.assertEqual([], list(tools.flatten([], ())))
self.assertEqual([], list(tools.flatten([[], (), [[]]], ((), []))))
def test_no_nesting(self):
self.assertEqual(
['a', 'bcd', 123, 45.6], list(tools.flatten('a', 'bcd', 123, 45.6))
)
self.assertEqual(
['a', 'bcd', 123, 45.6],
list(tools.flatten(['a', 'bcd', 123, 45.6])),
)
self.assertEqual(
['a', 'bcd', 123, 45.6],
list(tools.flatten(['a', 'bcd'], [123, 45.6])),
)
def test_nesting(self):
self.assertEqual(
['a', 'bcd', 123, 45.6],
list(tools.flatten('a', ['bcd'], [123], 45.6)),
)
self.assertEqual(
['a', 'bcd', 123, 45.6],
list(tools.flatten([['a', ('bcd', [123])], 45.6])),
)
self.assertEqual(
['a', 'bcd', 123, 45.6],
list(tools.flatten([('a', 'bcd')], [[[[123]]], 45.6])),
)
if __name__ == '__main__':
unittest.main()
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