def extract(self, key, doc):
path = doc[self.destkey]
with util.open_replace(path, encoding=self.encoding) as stream:
stream.write(doc[self.key])
if self.clear:
del doc[self.key]
def test_open_replace_write_ok(self):
"""
Test the open_replace utility function (happy path).
"""
open_mock = mock_open()
open_mock.return_value.name = '/path/to/some/tmpXYZ213'
with patch('spreadflow_delta.util.EncodedTemporaryFile', open_mock), patch('os.unlink') as unlink_mock, patch('os.rename') as rename_mock:
with util.open_replace('/path/to/some/file.txt', encoding='iso-8859-1') as stream_mock:
stream_mock.write('stuff')
open_mock.assert_called_once_with(encoding='iso-8859-1', dir='/path/to/some', delete=False)
self.assertFalse(unlink_mock.called)
rename_mock.assert_called_once_with('/path/to/some/tmpXYZ213', '/path/to/some/file.txt')
def test_open_replace_write_fail(self):
"""
Test the open_replace utility function (exception during write).
"""
open_mock = mock_open()
open_mock.return_value.name = '/path/to/some/tmpXYZ213'
with patch('spreadflow_delta.util.EncodedTemporaryFile', open_mock), patch('os.unlink') as unlink_mock, patch('os.rename') as rename_mock:
with ExpectedException(RuntimeError, 'boom!'):
with util.open_replace('/path/to/some/file.txt'):
raise RuntimeError('boom!')
open_mock.assert_called_once_with(encoding=None, dir='/path/to/some', delete=False)
unlink_mock.assert_called_once_with('/path/to/some/tmpXYZ213')
self.assertFalse(rename_mock.called)