def test_it_opens_custom_file(self):
with NamedTemporaryFile() as temp_file:
main(['-i', temp_file.name])
file_object = self._mock_stream_to_regexp.call_args[0][0]
self.assertIsInstance(file_object, TextIOWrapper)
self.assertEqual(temp_file.name, file_object.name)
def test_it_refuses_unknown_formatters(self):
with patch('sys.stderr', new_callable=StringIO):
with self.assertRaises(SystemExit) as exception_context:
main(['-f', 'sjaflksag'])
self.assertNotEqual(0, exception_context.exception.code)
self._mock_stream_to_regexp.assert_not_called()
def test_it_can_print_help(self, mock_stdout):
with self.assertRaises(SystemExit) as exception_context:
main(['-h'])
self.assertEqual(0, exception_context.exception.code)
self.assertIn("Words to Regular Expression", mock_stdout.getvalue())
self._mock_stream_to_regexp.assert_not_called()
def test_it_prints_out_version(self):
with patch('sys.stdout', new_callable=StringIO) as mock_stdout:
main(['--version'])
output = mock_stdout.getvalue()
self.assertIn(VERSION, output)
self.assertIn(APPLICATION_NAME, output)
self.assertIn(CHANGELOG_URL, output)
def test_it_converts_stream_to_regular_expression(self, mock_stdout):
with NamedTemporaryFile() as temp_file:
main(['-i', temp_file.name])
self.assertEqual(PythonFormatter._EMPTY_STRING_MATCH, mock_stdout.getvalue())
def test_it_uses_stdin_as_input_by_default(self):
main([])
self._mock_stream_to_regexp.called_with([sys.stdin, ANY])
def test_it_accepts_valid_formatters(self):
for formatter_class in ALL_FORMATTERS:
formatter_code = formatter_class.code()
main(['-f', formatter_code])
self._mock_stream_to_regexp.called_with([ANY, formatter_class])
self._mock_stream_to_regexp.reset()
def test_it_uses_python_formatter_by_default(self):
main([])
self._mock_stream_to_regexp.called_with([ANY, PythonFormatter])