| # 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 |
| # |
| # 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. |
| """Tests for tink.python.util.file_object_adapter.""" |
| |
| from __future__ import absolute_import |
| from __future__ import division |
| from __future__ import print_function |
| |
| import io |
| |
| from absl.testing import absltest |
| # TODO(b/141106504) Replace this with unittest.mock |
| import mock |
| from tink.python.util import file_object_adapter |
| |
| |
| class FileObjectAdapterTest(absltest.TestCase): |
| |
| def test_basic_write(self): |
| file_object = io.BytesIO() |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| self.assertEqual(9, adapter.write(b'something')) |
| self.assertEqual(b'something', file_object.getvalue()) |
| adapter.close() |
| |
| def test_multiple_write(self): |
| file_object = io.BytesIO() |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| self.assertEqual(9, adapter.write(b'something')) |
| self.assertEqual(3, adapter.write(b'123')) |
| self.assertEqual(3, adapter.write(b'456')) |
| self.assertEqual(b'something123456', file_object.getvalue()) |
| |
| def test_write_after_close(self): |
| file_object = io.BytesIO() |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| adapter.close() |
| self.assertRaises(ValueError, adapter.write, b'something') |
| |
| def test_write_returns_none(self): |
| file_object = mock.Mock() |
| file_object.write = mock.Mock(return_value=None) |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| self.assertEqual(0, adapter.write(b'something')) |
| |
| def test_write_raises_blocking_error(self): |
| file_object = mock.Mock() |
| file_object.write = mock.Mock(side_effect=io.BlockingIOError(None, None, 5)) |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| self.assertEqual(5, adapter.write(b'something')) |
| |
| def test_partial_write(self): |
| file_object = mock.Mock() |
| file_object.write = mock.Mock(wraps=lambda data: len(data) - 1) |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| self.assertEqual(8, adapter.write(b'something')) |
| |
| def test_basic_read(self): |
| file_object = io.BytesIO(b'something') |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| self.assertEqual(adapter.read(9), b'something') |
| |
| def test_multiple_read(self): |
| file_object = io.BytesIO(b'something') |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| self.assertEqual(adapter.read(3), b'som') |
| self.assertEqual(adapter.read(3), b'eth') |
| self.assertEqual(adapter.read(3), b'ing') |
| |
| def test_read_returns_none(self): |
| file_object = mock.Mock() |
| file_object.read = mock.Mock(return_value=None) |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| self.assertEqual(adapter.read(10), b'') |
| |
| def test_read_eof(self): |
| file_object = mock.Mock() |
| file_object.read = mock.Mock(return_value=b'') |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| self.assertRaises(EOFError, adapter.read, 10) |
| |
| def test_read_size_0(self): |
| file_object = io.BytesIO(b'something') |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| self.assertEqual(adapter.read(0), b'') |
| |
| def test_read_raises_blocking_error(self): |
| file_object = mock.Mock() |
| file_object.read = mock.Mock(side_effect=io.BlockingIOError(None, None)) |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| |
| self.assertEqual(adapter.read(10), b'') |
| |
| |
| if __name__ == '__main__': |
| absltest.main() |