| # 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 |
| from tink.python.util import file_object_adapter |
| |
| |
| class FileObjectAdapterTest(absltest.TestCase): |
| |
| def test_basic(self): |
| file_object = io.BytesIO() |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| self.assertEqual(9, adapter.write(b'something')) |
| self.assertEqual(9, adapter.position()) |
| 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()) |
| adapter.close() |
| |
| 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_position(self): |
| file_object = io.BytesIO() |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| self.assertEqual(0, adapter.position()) |
| self.assertEqual(9, adapter.write(b'something')) |
| self.assertEqual(9, adapter.position()) |
| self.assertEqual(3, adapter.write(b'123')) |
| self.assertEqual(12, adapter.position()) |
| adapter.close() |
| |
| def test_non_writable(self): |
| |
| class TestNonWritableObject(io.RawIOBase): |
| """Test non-writable file-like object.""" |
| |
| def writable(self): |
| return False |
| |
| non_writable_object = TestNonWritableObject() |
| self.assertRaises(TypeError, file_object_adapter.FileObjectAdapter, |
| non_writable_object) |
| |
| def test_partial_write(self): |
| |
| class TestFileObject(io.RawIOBase): |
| """Test file-like object that always writes only first 5 bytes of data.""" |
| |
| def __init__(self): |
| super(TestFileObject, self).__init__() |
| self.value = b'' |
| |
| def writable(self): |
| return True |
| |
| def write(self, data): |
| self.value += data[:5] |
| return 5 |
| |
| def tell(self): |
| return len(self.value) |
| |
| file_object = TestFileObject() |
| adapter = file_object_adapter.FileObjectAdapter(file_object) |
| self.assertEqual(5, adapter.write(b'something')) |
| self.assertEqual(5, adapter.position()) |
| self.assertEqual(b'somet', file_object.value) |
| |
| |
| if __name__ == '__main__': |
| absltest.main() |