"""Dependency injector callable providers unit tests.""" import sys import unittest from dependency_injector import ( providers, errors, ) def _example(arg1, arg2, arg3, arg4): return arg1, arg2, arg3, arg4 class CallableTests(unittest.TestCase): def test_init_with_callable(self): self.assertTrue(providers.Callable(_example)) def test_init_with_not_callable(self): self.assertRaises(errors.Error, providers.Callable, 123) def test_init_optional_provides(self): provider = providers.Callable() provider.set_provides(object) self.assertIs(provider.provides, object) self.assertIsInstance(provider(), object) def test_set_provides_returns_self(self): provider = providers.Callable() self.assertIs(provider.set_provides(object), provider) def test_provided_instance_provider(self): provider = providers.Callable(_example) self.assertIsInstance(provider.provided, providers.ProvidedInstance) def test_call(self): provider = providers.Callable(lambda: True) self.assertTrue(provider()) def test_call_with_positional_args(self): provider = providers.Callable(_example, 1, 2, 3, 4) self.assertTupleEqual(provider(), (1, 2, 3, 4)) def test_call_with_keyword_args(self): provider = providers.Callable(_example, arg1=1, arg2=2, arg3=3, arg4=4) self.assertTupleEqual(provider(), (1, 2, 3, 4)) def test_call_with_positional_and_keyword_args(self): provider = providers.Callable(_example, 1, 2, arg3=3, arg4=4) self.assertTupleEqual(provider(), (1, 2, 3, 4)) def test_call_with_context_args(self): provider = providers.Callable(_example, 1, 2) self.assertTupleEqual(provider(3, 4), (1, 2, 3, 4)) def test_call_with_context_kwargs(self): provider = providers.Callable(_example, arg1=1) self.assertTupleEqual(provider(arg2=2, arg3=3, arg4=4), (1, 2, 3, 4)) def test_call_with_context_args_and_kwargs(self): provider = providers.Callable(_example, 1) self.assertTupleEqual(provider(2, arg3=3, arg4=4), (1, 2, 3, 4)) def test_fluent_interface(self): provider = providers.Singleton(_example) \ .add_args(1, 2) \ .add_kwargs(arg3=3, arg4=4) self.assertTupleEqual(provider(), (1, 2, 3, 4)) def test_set_args(self): provider = providers.Callable(_example) \ .add_args(1, 2) \ .set_args(3, 4) self.assertEqual(provider.args, (3, 4)) def test_set_kwargs(self): provider = providers.Callable(_example) \ .add_kwargs(init_arg3=3, init_arg4=4) \ .set_kwargs(init_arg3=4, init_arg4=5) self.assertEqual(provider.kwargs, dict(init_arg3=4, init_arg4=5)) def test_clear_args(self): provider = providers.Callable(_example) \ .add_args(1, 2) \ .clear_args() self.assertEqual(provider.args, tuple()) def test_clear_kwargs(self): provider = providers.Callable(_example) \ .add_kwargs(init_arg3=3, init_arg4=4) \ .clear_kwargs() self.assertEqual(provider.kwargs, dict()) def test_call_overridden(self): provider = providers.Callable(_example) provider.override(providers.Object((4, 3, 2, 1))) provider.override(providers.Object((1, 2, 3, 4))) self.assertTupleEqual(provider(), (1, 2, 3, 4)) def test_deepcopy(self): provider = providers.Callable(_example) provider_copy = providers.deepcopy(provider) self.assertIsNot(provider, provider_copy) self.assertIs(provider.provides, provider_copy.provides) self.assertIsInstance(provider, providers.Callable) def test_deepcopy_from_memo(self): provider = providers.Callable(_example) provider_copy_memo = providers.Callable(_example) provider_copy = providers.deepcopy( provider, memo={id(provider): provider_copy_memo}) self.assertIs(provider_copy, provider_copy_memo) def test_deepcopy_args(self): provider = providers.Callable(_example) dependent_provider1 = providers.Callable(list) dependent_provider2 = providers.Callable(dict) provider.add_args(dependent_provider1, dependent_provider2) provider_copy = providers.deepcopy(provider) dependent_provider_copy1 = provider_copy.args[0] dependent_provider_copy2 = provider_copy.args[1] self.assertNotEqual(provider.args, provider_copy.args) self.assertIs(dependent_provider1.provides, dependent_provider_copy1.provides) self.assertIsNot(dependent_provider1, dependent_provider_copy1) self.assertIs(dependent_provider2.provides, dependent_provider_copy2.provides) self.assertIsNot(dependent_provider2, dependent_provider_copy2) def test_deepcopy_kwargs(self): provider = providers.Callable(_example) dependent_provider1 = providers.Callable(list) dependent_provider2 = providers.Callable(dict) provider.add_kwargs(a1=dependent_provider1, a2=dependent_provider2) provider_copy = providers.deepcopy(provider) dependent_provider_copy1 = provider_copy.kwargs['a1'] dependent_provider_copy2 = provider_copy.kwargs['a2'] self.assertNotEqual(provider.kwargs, provider_copy.kwargs) self.assertIs(dependent_provider1.provides, dependent_provider_copy1.provides) self.assertIsNot(dependent_provider1, dependent_provider_copy1) self.assertIs(dependent_provider2.provides, dependent_provider_copy2.provides) self.assertIsNot(dependent_provider2, dependent_provider_copy2) def test_deepcopy_overridden(self): provider = providers.Callable(_example) object_provider = providers.Object(object()) provider.override(object_provider) provider_copy = providers.deepcopy(provider) object_provider_copy = provider_copy.overridden[0] self.assertIsNot(provider, provider_copy) self.assertIs(provider.provides, provider_copy.provides) self.assertIsInstance(provider, providers.Callable) self.assertIsNot(object_provider, object_provider_copy) self.assertIsInstance(object_provider_copy, providers.Object) def test_deepcopy_with_sys_streams(self): provider = providers.Callable(_example) provider.add_args(sys.stdin) provider.add_kwargs(a2=sys.stdout) provider_copy = providers.deepcopy(provider) self.assertIsNot(provider, provider_copy) self.assertIsInstance(provider_copy, providers.Callable) self.assertIs(provider.args[0], sys.stdin) self.assertIs(provider.kwargs['a2'], sys.stdout) def test_repr(self): provider = providers.Callable(_example) self.assertEqual(repr(provider), ''.format( repr(_example), hex(id(provider)))) class DelegatedCallableTests(unittest.TestCase): def test_inheritance(self): self.assertIsInstance(providers.DelegatedCallable(_example), providers.Callable) def test_is_provider(self): self.assertTrue( providers.is_provider(providers.DelegatedCallable(_example))) def test_is_delegated_provider(self): provider = providers.DelegatedCallable(_example) self.assertTrue(providers.is_delegated(provider)) def test_repr(self): provider = providers.DelegatedCallable(_example) self.assertEqual(repr(provider), ''.format( repr(_example), hex(id(provider)))) class AbstractCallableTests(unittest.TestCase): def test_inheritance(self): self.assertIsInstance(providers.AbstractCallable(_example), providers.Callable) def test_call_overridden_by_callable(self): def _abstract_example(): pass provider = providers.AbstractCallable(_abstract_example) provider.override(providers.Callable(_example)) self.assertTrue(provider(1, 2, 3, 4), (1, 2, 3, 4)) def test_call_overridden_by_delegated_callable(self): def _abstract_example(): pass provider = providers.AbstractCallable(_abstract_example) provider.override(providers.DelegatedCallable(_example)) self.assertTrue(provider(1, 2, 3, 4), (1, 2, 3, 4)) def test_call_not_overridden(self): provider = providers.AbstractCallable(_example) with self.assertRaises(errors.Error): provider(1, 2, 3, 4) def test_override_by_not_callable(self): provider = providers.AbstractCallable(_example) with self.assertRaises(errors.Error): provider.override(providers.Factory(object)) def test_provide_not_implemented(self): provider = providers.AbstractCallable(_example) with self.assertRaises(NotImplementedError): provider._provide((1, 2, 3, 4), dict()) def test_repr(self): provider = providers.AbstractCallable(_example) self.assertEqual(repr(provider), ''.format( repr(_example), hex(id(provider)))) class CallableDelegateTests(unittest.TestCase): def setUp(self): self.delegated = providers.Callable(_example) self.delegate = providers.CallableDelegate(self.delegated) def test_is_delegate(self): self.assertIsInstance(self.delegate, providers.Delegate) def test_init_with_not_callable(self): self.assertRaises(errors.Error, providers.CallableDelegate, providers.Object(object()))