"""Dependency injector factory providers unit tests.""" import sys import unittest from dependency_injector import ( providers, errors, ) class Example(object): def __init__(self, init_arg1=None, init_arg2=None, init_arg3=None, init_arg4=None): self.init_arg1 = init_arg1 self.init_arg2 = init_arg2 self.init_arg3 = init_arg3 self.init_arg4 = init_arg4 self.attribute1 = None self.attribute2 = None class FactoryTests(unittest.TestCase): def test_is_provider(self): self.assertTrue(providers.is_provider(providers.Factory(Example))) def test_init_with_callable(self): self.assertTrue(providers.Factory(credits)) def test_init_with_not_callable(self): self.assertRaises(errors.Error, providers.Factory, 123) def test_init_with_valid_provided_type(self): class ExampleProvider(providers.Factory): provided_type = Example example_provider = ExampleProvider(Example, 1, 2) self.assertIsInstance(example_provider(), Example) def test_init_with_valid_provided_subtype(self): class ExampleProvider(providers.Factory): provided_type = Example class NewExampe(Example): pass example_provider = ExampleProvider(NewExampe, 1, 2) self.assertIsInstance(example_provider(), NewExampe) def test_init_with_invalid_provided_type(self): class ExampleProvider(providers.Factory): provided_type = Example with self.assertRaises(errors.Error): ExampleProvider(list) def test_provided_instance_provider(self): provider = providers.Factory(Example) self.assertIsInstance(provider.provided, providers.ProvidedInstance) def test_call(self): provider = providers.Factory(Example) instance1 = provider() instance2 = provider() self.assertIsNot(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_init_positional_args(self): provider = providers.Factory(Example, 'i1', 'i2') instance1 = provider() instance2 = provider() self.assertEqual(instance1.init_arg1, 'i1') self.assertEqual(instance1.init_arg2, 'i2') self.assertEqual(instance2.init_arg1, 'i1') self.assertEqual(instance2.init_arg2, 'i2') self.assertIsNot(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_init_keyword_args(self): provider = providers.Factory(Example, init_arg1='i1', init_arg2='i2') instance1 = provider() instance2 = provider() self.assertEqual(instance1.init_arg1, 'i1') self.assertEqual(instance1.init_arg2, 'i2') self.assertEqual(instance2.init_arg1, 'i1') self.assertEqual(instance2.init_arg2, 'i2') self.assertIsNot(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_init_positional_and_keyword_args(self): provider = providers.Factory(Example, 'i1', init_arg2='i2') instance1 = provider() instance2 = provider() self.assertEqual(instance1.init_arg1, 'i1') self.assertEqual(instance1.init_arg2, 'i2') self.assertEqual(instance2.init_arg1, 'i1') self.assertEqual(instance2.init_arg2, 'i2') self.assertIsNot(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_attributes(self): provider = providers.Factory(Example) provider.add_attributes(attribute1='a1', attribute2='a2') instance1 = provider() instance2 = provider() self.assertEqual(instance1.attribute1, 'a1') self.assertEqual(instance1.attribute2, 'a2') self.assertEqual(instance2.attribute1, 'a1') self.assertEqual(instance2.attribute2, 'a2') self.assertIsNot(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_context_args(self): provider = providers.Factory(Example, 11, 22) instance = provider(33, 44) self.assertEqual(instance.init_arg1, 11) self.assertEqual(instance.init_arg2, 22) self.assertEqual(instance.init_arg3, 33) self.assertEqual(instance.init_arg4, 44) def test_call_with_context_kwargs(self): provider = providers.Factory(Example, init_arg1=1) instance1 = provider(init_arg2=22) self.assertEqual(instance1.init_arg1, 1) self.assertEqual(instance1.init_arg2, 22) instance2 = provider(init_arg1=11, init_arg2=22) self.assertEqual(instance2.init_arg1, 11) self.assertEqual(instance2.init_arg2, 22) def test_call_with_context_args_and_kwargs(self): provider = providers.Factory(Example, 11) instance = provider(22, init_arg3=33, init_arg4=44) self.assertEqual(instance.init_arg1, 11) self.assertEqual(instance.init_arg2, 22) self.assertEqual(instance.init_arg3, 33) self.assertEqual(instance.init_arg4, 44) def test_call_with_deep_context_kwargs(self): """`Factory` providers deep init injections example.""" class Regularizer: def __init__(self, alpha): self.alpha = alpha class Loss: def __init__(self, regularizer): self.regularizer = regularizer class ClassificationTask: def __init__(self, loss): self.loss = loss class Algorithm: def __init__(self, task): self.task = task algorithm_factory = providers.Factory( Algorithm, task=providers.Factory( ClassificationTask, loss=providers.Factory( Loss, regularizer=providers.Factory( Regularizer, ), ), ), ) algorithm_1 = algorithm_factory(task__loss__regularizer__alpha=0.5) algorithm_2 = algorithm_factory(task__loss__regularizer__alpha=0.7) algorithm_3 = algorithm_factory(task__loss__regularizer=Regularizer(alpha=0.8)) self.assertEqual(algorithm_1.task.loss.regularizer.alpha, 0.5) self.assertEqual(algorithm_2.task.loss.regularizer.alpha, 0.7) self.assertEqual(algorithm_3.task.loss.regularizer.alpha, 0.8) def test_fluent_interface(self): provider = providers.Factory(Example) \ .add_args(1, 2) \ .add_kwargs(init_arg3=3, init_arg4=4) \ .add_attributes(attribute1=5, attribute2=6) instance = provider() self.assertEqual(instance.init_arg1, 1) self.assertEqual(instance.init_arg2, 2) self.assertEqual(instance.init_arg3, 3) self.assertEqual(instance.init_arg4, 4) self.assertEqual(instance.attribute1, 5) self.assertEqual(instance.attribute2, 6) def test_set_args(self): provider = providers.Factory(Example) \ .add_args(1, 2) \ .set_args(3, 4) self.assertEqual(provider.args, (3, 4)) def test_set_kwargs(self): provider = providers.Factory(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_set_attributes(self): provider = providers.Factory(Example) \ .add_attributes(attribute1=5, attribute2=6) \ .set_attributes(attribute1=6, attribute2=7) self.assertEqual(provider.attributes, dict(attribute1=6, attribute2=7)) def test_clear_args(self): provider = providers.Factory(Example) \ .add_args(1, 2) \ .clear_args() self.assertEqual(provider.args, tuple()) def test_clear_kwargs(self): provider = providers.Factory(Example) \ .add_kwargs(init_arg3=3, init_arg4=4) \ .clear_kwargs() self.assertEqual(provider.kwargs, dict()) def test_clear_attributes(self): provider = providers.Factory(Example) \ .add_attributes(attribute1=5, attribute2=6) \ .clear_attributes() self.assertEqual(provider.attributes, dict()) def test_call_overridden(self): provider = providers.Factory(Example) overriding_provider1 = providers.Factory(dict) overriding_provider2 = providers.Factory(list) provider.override(overriding_provider1) provider.override(overriding_provider2) instance1 = provider() instance2 = provider() self.assertIsNot(instance1, instance2) self.assertIsInstance(instance1, list) self.assertIsInstance(instance2, list) def test_deepcopy(self): provider = providers.Factory(Example) provider_copy = providers.deepcopy(provider) self.assertIsNot(provider, provider_copy) self.assertIs(provider.cls, provider_copy.cls) self.assertIsInstance(provider, providers.Factory) def test_deepcopy_from_memo(self): provider = providers.Factory(Example) provider_copy_memo = providers.Factory(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.Factory(Example) dependent_provider1 = providers.Factory(list) dependent_provider2 = providers.Factory(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.cls, dependent_provider_copy1.cls) self.assertIsNot(dependent_provider1, dependent_provider_copy1) self.assertIs(dependent_provider2.cls, dependent_provider_copy2.cls) self.assertIsNot(dependent_provider2, dependent_provider_copy2) def test_deepcopy_kwargs(self): provider = providers.Factory(Example) dependent_provider1 = providers.Factory(list) dependent_provider2 = providers.Factory(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.cls, dependent_provider_copy1.cls) self.assertIsNot(dependent_provider1, dependent_provider_copy1) self.assertIs(dependent_provider2.cls, dependent_provider_copy2.cls) self.assertIsNot(dependent_provider2, dependent_provider_copy2) def test_deepcopy_attributes(self): provider = providers.Factory(Example) dependent_provider1 = providers.Factory(list) dependent_provider2 = providers.Factory(dict) provider.add_attributes(a1=dependent_provider1, a2=dependent_provider2) provider_copy = providers.deepcopy(provider) dependent_provider_copy1 = provider_copy.attributes['a1'] dependent_provider_copy2 = provider_copy.attributes['a2'] self.assertNotEqual(provider.attributes, provider_copy.attributes) self.assertIs(dependent_provider1.cls, dependent_provider_copy1.cls) self.assertIsNot(dependent_provider1, dependent_provider_copy1) self.assertIs(dependent_provider2.cls, dependent_provider_copy2.cls) self.assertIsNot(dependent_provider2, dependent_provider_copy2) def test_deepcopy_overridden(self): provider = providers.Factory(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.cls, provider_copy.cls) self.assertIsInstance(provider, providers.Factory) self.assertIsNot(object_provider, object_provider_copy) self.assertIsInstance(object_provider_copy, providers.Object) def test_deepcopy_with_sys_streams(self): provider = providers.Factory(Example) provider.add_args(sys.stdin) provider.add_kwargs(a2=sys.stdout) provider.add_attributes(a3=sys.stderr) provider_copy = providers.deepcopy(provider) self.assertIsNot(provider, provider_copy) self.assertIsInstance(provider_copy, providers.Factory) self.assertIs(provider.args[0], sys.stdin) self.assertIs(provider.kwargs['a2'], sys.stdout) self.assertIs(provider.attributes['a3'], sys.stderr) def test_repr(self): provider = providers.Factory(Example) self.assertEqual(repr(provider), ''.format( repr(Example), hex(id(provider)))) class DelegatedFactoryTests(unittest.TestCase): def test_inheritance(self): self.assertIsInstance(providers.DelegatedFactory(object), providers.Factory) def test_is_provider(self): self.assertTrue( providers.is_provider(providers.DelegatedFactory(object))) def test_is_delegated_provider(self): self.assertTrue( providers.is_delegated(providers.DelegatedFactory(object))) def test_repr(self): provider = providers.DelegatedFactory(Example) self.assertEqual(repr(provider), ''.format( repr(Example), hex(id(provider)))) class AbstractFactoryTests(unittest.TestCase): def test_inheritance(self): self.assertIsInstance(providers.AbstractFactory(Example), providers.Factory) def test_call_overridden_by_factory(self): provider = providers.AbstractFactory(object) provider.override(providers.Factory(Example)) self.assertIsInstance(provider(), Example) def test_call_overridden_by_delegated_factory(self): provider = providers.AbstractFactory(object) provider.override(providers.DelegatedFactory(Example)) self.assertIsInstance(provider(), Example) def test_call_not_overridden(self): provider = providers.AbstractFactory(object) with self.assertRaises(errors.Error): provider() def test_override_by_not_factory(self): provider = providers.AbstractFactory(object) with self.assertRaises(errors.Error): provider.override(providers.Callable(object)) def test_provide_not_implemented(self): provider = providers.AbstractFactory(Example) with self.assertRaises(NotImplementedError): provider._provide(tuple(), dict()) def test_repr(self): provider = providers.AbstractFactory(Example) self.assertEqual(repr(provider), ''.format( repr(Example), hex(id(provider)))) class FactoryDelegateTests(unittest.TestCase): def setUp(self): self.delegated = providers.Factory(object) self.delegate = providers.FactoryDelegate(self.delegated) def test_is_delegate(self): self.assertIsInstance(self.delegate, providers.Delegate) def test_init_with_not_factory(self): self.assertRaises(errors.Error, providers.FactoryDelegate, providers.Object(object())) class FactoryAggregateTests(unittest.TestCase): class ExampleA(Example): pass class ExampleB(Example): pass def setUp(self): self.example_a_factory = providers.Factory(self.ExampleA) self.example_b_factory = providers.Factory(self.ExampleB) self.factory_aggregate = providers.FactoryAggregate( example_a=self.example_a_factory, example_b=self.example_b_factory) def test_is_provider(self): self.assertTrue(providers.is_provider(self.factory_aggregate)) def test_is_delegated_provider(self): self.assertTrue(providers.is_delegated(self.factory_aggregate)) def test_init_with_not_a_factory(self): with self.assertRaises(errors.Error): providers.FactoryAggregate( example_a=providers.Factory(self.ExampleA), example_b=object()) def test_call(self): object_a = self.factory_aggregate('example_a', 1, 2, init_arg3=3, init_arg4=4) object_b = self.factory_aggregate('example_b', 11, 22, init_arg3=33, init_arg4=44) self.assertIsInstance(object_a, self.ExampleA) self.assertEqual(object_a.init_arg1, 1) self.assertEqual(object_a.init_arg2, 2) self.assertEqual(object_a.init_arg3, 3) self.assertEqual(object_a.init_arg4, 4) self.assertIsInstance(object_b, self.ExampleB) self.assertEqual(object_b.init_arg1, 11) self.assertEqual(object_b.init_arg2, 22) self.assertEqual(object_b.init_arg3, 33) self.assertEqual(object_b.init_arg4, 44) def test_call_factory_name_as_kwarg(self): object_a = self.factory_aggregate( factory_name='example_a', init_arg1=1, init_arg2=2, init_arg3=3, init_arg4=4, ) self.assertIsInstance(object_a, self.ExampleA) self.assertEqual(object_a.init_arg1, 1) self.assertEqual(object_a.init_arg2, 2) self.assertEqual(object_a.init_arg3, 3) self.assertEqual(object_a.init_arg4, 4) def test_call_no_factory_name(self): with self.assertRaises(TypeError): self.factory_aggregate() def test_call_no_such_provider(self): with self.assertRaises(errors.NoSuchProviderError): self.factory_aggregate('unknown') def test_overridden(self): with self.assertRaises(errors.Error): self.factory_aggregate.override(providers.Object(object())) def test_getattr(self): self.assertIs(self.factory_aggregate.example_a, self.example_a_factory) self.assertIs(self.factory_aggregate.example_b, self.example_b_factory) def test_getattr_no_such_provider(self): with self.assertRaises(errors.NoSuchProviderError): self.factory_aggregate.unknown def test_factories(self): self.assertDictEqual(self.factory_aggregate.factories, dict(example_a=self.example_a_factory, example_b=self.example_b_factory)) def test_deepcopy(self): provider_copy = providers.deepcopy(self.factory_aggregate) self.assertIsNot(self.factory_aggregate, provider_copy) self.assertIsInstance(provider_copy, type(self.factory_aggregate)) self.assertIsNot(self.factory_aggregate.example_a, provider_copy.example_a) self.assertIsInstance(self.factory_aggregate.example_a, type(provider_copy.example_a)) self.assertIs(self.factory_aggregate.example_a.cls, provider_copy.example_a.cls) self.assertIsNot(self.factory_aggregate.example_b, provider_copy.example_b) self.assertIsInstance(self.factory_aggregate.example_b, type(provider_copy.example_b)) self.assertIs(self.factory_aggregate.example_b.cls, provider_copy.example_b.cls) def test_repr(self): self.assertEqual(repr(self.factory_aggregate), ''.format( repr(self.factory_aggregate.factories), hex(id(self.factory_aggregate))))