| # |
| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You 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 decorators module.""" |
| |
| # pytype: skip-file |
| |
| from __future__ import absolute_import |
| |
| import re |
| import sys |
| import unittest |
| |
| import future.tests.base # pylint: disable=unused-import |
| |
| from apache_beam.typehints import Any |
| from apache_beam.typehints import List |
| from apache_beam.typehints import WithTypeHints |
| from apache_beam.typehints import decorators |
| from apache_beam.typehints import typehints |
| |
| |
| class IOTypeHintsTest(unittest.TestCase): |
| def test_get_signature(self): |
| # Basic coverage only to make sure function works in Py2 and Py3. |
| def fn(a, b=1, *c, **d): |
| return a, b, c, d |
| |
| s = decorators.get_signature(fn) |
| self.assertListEqual(list(s.parameters), ['a', 'b', 'c', 'd']) |
| |
| def test_get_signature_builtin(self): |
| # Tests a builtin function for 3.7+ and fallback result for older versions. |
| s = decorators.get_signature(list) |
| if sys.version_info < (3, 7): |
| self.assertListEqual( |
| list(s.parameters), |
| ['_', '__unknown__varargs', '__unknown__keywords']) |
| else: |
| self.assertListEqual(list(s.parameters), ['iterable']) |
| self.assertEqual(s.return_annotation, List[Any]) |
| |
| def test_from_callable_without_annotations(self): |
| # Python 2 doesn't support annotations. See decorators_test_py3.py for that. |
| def fn(a, b=None, *args, **kwargs): |
| return a, b, args, kwargs |
| |
| th = decorators.IOTypeHints.from_callable(fn) |
| self.assertIsNone(th) |
| |
| def test_from_callable_builtin(self): |
| th = decorators.IOTypeHints.from_callable(len) |
| self.assertIsNone(th) |
| |
| def test_from_callable_method_descriptor(self): |
| # from_callable() injects an annotation in this special type of builtin. |
| th = decorators.IOTypeHints.from_callable(str.strip) |
| if sys.version_info >= (3, 7): |
| self.assertEqual(th.input_types, ((str, Any), {})) |
| else: |
| self.assertEqual( |
| th.input_types, |
| ((str, decorators._ANY_VAR_POSITIONAL), { |
| '__unknown__keywords': decorators._ANY_VAR_KEYWORD |
| })) |
| self.assertEqual(th.output_types, ((Any, ), {})) |
| |
| def test_strip_iterable_not_simple_output_noop(self): |
| th = decorators.IOTypeHints( |
| input_types=None, output_types=((int, str), {}), origin=[]) |
| th = th.strip_iterable() |
| self.assertEqual(((int, str), {}), th.output_types) |
| |
| def _test_strip_iterable(self, before, expected_after): |
| th = decorators.IOTypeHints( |
| input_types=None, output_types=((before, ), {}), origin=[]) |
| after = th.strip_iterable() |
| self.assertEqual(((expected_after, ), {}), after.output_types) |
| |
| def _test_strip_iterable_fail(self, before): |
| with self.assertRaisesRegex(ValueError, r'not iterable'): |
| self._test_strip_iterable(before, None) |
| |
| def test_strip_iterable(self): |
| self._test_strip_iterable(None, None) |
| self._test_strip_iterable(typehints.Any, typehints.Any) |
| self._test_strip_iterable(typehints.Iterable[str], str) |
| self._test_strip_iterable(typehints.List[str], str) |
| self._test_strip_iterable(typehints.Iterator[str], str) |
| self._test_strip_iterable(typehints.Generator[str], str) |
| self._test_strip_iterable(typehints.Tuple[str], str) |
| self._test_strip_iterable( |
| typehints.Tuple[str, int], typehints.Union[str, int]) |
| self._test_strip_iterable(typehints.Tuple[str, ...], str) |
| self._test_strip_iterable(typehints.KV[str, int], typehints.Union[str, int]) |
| self._test_strip_iterable(typehints.Set[str], str) |
| self._test_strip_iterable(typehints.FrozenSet[str], str) |
| |
| self._test_strip_iterable_fail(typehints.Union[str, int]) |
| self._test_strip_iterable_fail(typehints.Optional[str]) |
| self._test_strip_iterable_fail(typehints.WindowedValue[str]) # type: ignore[misc] |
| self._test_strip_iterable_fail(typehints.Dict[str, int]) |
| |
| def test_make_traceback(self): |
| origin = ''.join( |
| decorators.IOTypeHints.empty().with_input_types(str).origin) |
| self.assertRegex(origin, __name__) |
| # TODO: use self.assertNotRegex once py2 support is removed. |
| self.assertIsNone(re.search(r'\b_make_traceback', origin), msg=origin) |
| |
| def test_origin(self): |
| th = decorators.IOTypeHints.empty() |
| self.assertListEqual([], th.origin) |
| th = th.with_input_types(str) |
| self.assertRegex(th.debug_str(), r'with_input_types') |
| th = th.with_output_types(str) |
| self.assertRegex(th.debug_str(), r'(?s)with_output_types.*with_input_types') |
| |
| th = decorators.IOTypeHints.empty().with_output_types(str) |
| th2 = decorators.IOTypeHints.empty().with_input_types(int) |
| th = th.with_defaults(th2) |
| self.assertRegex(th.debug_str(), r'(?s)based on:.*\'str\'.*and:.*\'int\'') |
| |
| def test_with_defaults_noop_does_not_grow_origin(self): |
| th = decorators.IOTypeHints.empty() |
| expected_id = id(th) |
| th = th.with_defaults(None) |
| self.assertEqual(expected_id, id(th)) |
| th = th.with_defaults(decorators.IOTypeHints.empty()) |
| self.assertEqual(expected_id, id(th)) |
| |
| th = th.with_input_types(str) |
| expected_id = id(th) |
| th = th.with_defaults(th) |
| self.assertEqual(expected_id, id(th)) |
| |
| th2 = th.with_output_types(int) |
| th = th.with_defaults(th2) |
| self.assertNotEqual(expected_id, id(th)) |
| |
| |
| class WithTypeHintsTest(unittest.TestCase): |
| def test_get_type_hints_no_settings(self): |
| class Base(WithTypeHints): |
| pass |
| |
| th = Base().get_type_hints() |
| self.assertEqual(th.input_types, None) |
| self.assertEqual(th.output_types, None) |
| |
| def test_get_type_hints_class_decorators(self): |
| @decorators.with_input_types(int, str) |
| @decorators.with_output_types(int) |
| class Base(WithTypeHints): |
| pass |
| |
| th = Base().get_type_hints() |
| self.assertEqual(th.input_types, ((int, str), {})) |
| self.assertEqual(th.output_types, ((int, ), {})) |
| |
| def test_get_type_hints_class_defaults(self): |
| class Base(WithTypeHints): |
| def default_type_hints(self): |
| return decorators.IOTypeHints( |
| input_types=((int, str), {}), output_types=((int, ), {}), origin=[]) |
| |
| th = Base().get_type_hints() |
| self.assertEqual(th.input_types, ((int, str), {})) |
| self.assertEqual(th.output_types, ((int, ), {})) |
| |
| def test_get_type_hints_precedence_defaults_over_decorators(self): |
| @decorators.with_input_types(int) |
| @decorators.with_output_types(str) |
| class Base(WithTypeHints): |
| def default_type_hints(self): |
| return decorators.IOTypeHints( |
| input_types=((float, ), {}), output_types=None, origin=[]) |
| |
| th = Base().get_type_hints() |
| self.assertEqual(th.input_types, ((float, ), {})) |
| self.assertEqual(th.output_types, ((str, ), {})) |
| |
| def test_get_type_hints_precedence_instance_over_defaults(self): |
| class Base(WithTypeHints): |
| def default_type_hints(self): |
| return decorators.IOTypeHints( |
| input_types=((float, ), {}), output_types=((str, ), {}), origin=[]) |
| |
| th = Base().with_input_types(int).get_type_hints() |
| self.assertEqual(th.input_types, ((int, ), {})) |
| self.assertEqual(th.output_types, ((str, ), {})) |
| |
| def test_inherits_does_not_modify(self): |
| # See BEAM-8629. |
| @decorators.with_output_types(int) |
| class Subclass(WithTypeHints): |
| def __init__(self): |
| pass # intentionally avoiding super call |
| |
| # These should be equal, but not the same object lest mutating the instance |
| # mutates the class. |
| self.assertIsNot( |
| Subclass()._get_or_create_type_hints(), Subclass._type_hints) |
| self.assertEqual(Subclass().get_type_hints(), Subclass._type_hints) |
| self.assertNotEqual( |
| Subclass().with_input_types(str)._type_hints, Subclass._type_hints) |
| |
| |
| class DecoratorsTest(unittest.TestCase): |
| def tearDown(self): |
| decorators._disable_from_callable = False |
| |
| def test_disable_type_annotations(self): |
| self.assertFalse(decorators._disable_from_callable) |
| decorators.disable_type_annotations() |
| self.assertTrue(decorators._disable_from_callable) |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |