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# 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()