"""Dependency injector singleton providers unit tests.""" import unittest2 as 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 SingletonTests(unittest.TestCase): def test_is_provider(self): self.assertTrue(providers.is_provider(providers.Singleton(Example))) def test_init_with_callable(self): self.assertTrue(providers.Singleton(credits)) def test_init_with_not_callable(self): self.assertRaises(errors.Error, providers.Singleton, 123) def test_init_with_valid_provided_type(self): class ExampleProvider(providers.Singleton): 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.Singleton): 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.Singleton): provided_type = Example with self.assertRaises(errors.Error): ExampleProvider(list) def test_call(self): provider = providers.Singleton(Example) instance1 = provider() instance2 = provider() self.assertIs(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_init_positional_args(self): provider = providers.Singleton(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.assertIs(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_init_keyword_args(self): provider = providers.Singleton(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.assertIs(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_init_positional_and_keyword_args(self): provider = providers.Singleton(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.assertIs(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_attributes(self): provider = providers.Singleton(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.assertIs(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_context_args(self): provider = providers.Singleton(Example) instance = provider(11, 22) self.assertEqual(instance.init_arg1, 11) self.assertEqual(instance.init_arg2, 22) def test_call_with_context_kwargs(self): provider = providers.Singleton(Example, init_arg1=1) instance1 = provider(init_arg2=22) self.assertEqual(instance1.init_arg1, 1) self.assertEqual(instance1.init_arg2, 22) # Instance is created earlier instance1 = provider(init_arg1=11, init_arg2=22) self.assertEqual(instance1.init_arg1, 1) self.assertEqual(instance1.init_arg2, 22) def test_call_with_context_args_and_kwargs(self): provider = providers.Singleton(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_fluent_interface(self): provider = providers.Singleton(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_call_overridden(self): provider = providers.Singleton(Example) overriding_provider1 = providers.Singleton(dict) overriding_provider2 = providers.Singleton(object) provider.override(overriding_provider1) provider.override(overriding_provider2) instance1 = provider() instance2 = provider() self.assertIs(instance1, instance2) self.assertIsInstance(instance1, object) self.assertIsInstance(instance2, object) def test_reset(self): provider = providers.Singleton(object) instance1 = provider() self.assertIsInstance(instance1, object) provider.reset() instance2 = provider() self.assertIsInstance(instance1, object) self.assertIsNot(instance1, instance2) def test_repr(self): provider = providers.Singleton(Example) self.assertEqual(repr(provider), ''.format( repr(Example), hex(id(provider)))) class DelegatedSingletonTests(unittest.TestCase): def test_inheritance(self): self.assertIsInstance(providers.DelegatedSingleton(object), providers.Singleton) def test_is_provider(self): self.assertTrue( providers.is_provider(providers.DelegatedSingleton(object))) def test_is_delegated_provider(self): provider = providers.DelegatedSingleton(object) self.assertIs(provider.provide_injection(), provider) class ThreadLocalSingletonTests(unittest.TestCase): def test_is_provider(self): self.assertTrue( providers.is_provider(providers.ThreadLocalSingleton(Example))) def test_init_with_callable(self): self.assertTrue(providers.ThreadLocalSingleton(credits)) def test_init_with_not_callable(self): self.assertRaises(errors.Error, providers.ThreadLocalSingleton, 123) def test_init_with_valid_provided_type(self): class ExampleProvider(providers.ThreadLocalSingleton): 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.ThreadLocalSingleton): 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.ThreadLocalSingleton): provided_type = Example with self.assertRaises(errors.Error): ExampleProvider(list) def test_call(self): provider = providers.ThreadLocalSingleton(Example) instance1 = provider() instance2 = provider() self.assertIs(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_init_positional_args(self): provider = providers.ThreadLocalSingleton(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.assertIs(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_init_keyword_args(self): provider = providers.ThreadLocalSingleton(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.assertIs(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_init_positional_and_keyword_args(self): provider = providers.ThreadLocalSingleton(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.assertIs(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_attributes(self): provider = providers.ThreadLocalSingleton(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.assertIs(instance1, instance2) self.assertIsInstance(instance1, Example) self.assertIsInstance(instance2, Example) def test_call_with_context_args(self): provider = providers.ThreadLocalSingleton(Example) instance = provider(11, 22) self.assertEqual(instance.init_arg1, 11) self.assertEqual(instance.init_arg2, 22) def test_call_with_context_kwargs(self): provider = providers.ThreadLocalSingleton(Example, init_arg1=1) instance1 = provider(init_arg2=22) self.assertEqual(instance1.init_arg1, 1) self.assertEqual(instance1.init_arg2, 22) # Instance is created earlier instance1 = provider(init_arg1=11, init_arg2=22) self.assertEqual(instance1.init_arg1, 1) self.assertEqual(instance1.init_arg2, 22) def test_call_with_context_args_and_kwargs(self): provider = providers.ThreadLocalSingleton(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_fluent_interface(self): provider = providers.ThreadLocalSingleton(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_call_overridden(self): provider = providers.ThreadLocalSingleton(Example) overriding_provider1 = providers.ThreadLocalSingleton(dict) overriding_provider2 = providers.ThreadLocalSingleton(object) provider.override(overriding_provider1) provider.override(overriding_provider2) instance1 = provider() instance2 = provider() self.assertIs(instance1, instance2) self.assertIsInstance(instance1, object) self.assertIsInstance(instance2, object) def test_reset(self): provider = providers.ThreadLocalSingleton(object) instance1 = provider() self.assertIsInstance(instance1, object) provider.reset() instance2 = provider() self.assertIsInstance(instance1, object) self.assertIsNot(instance1, instance2) def test_repr(self): provider = providers.ThreadLocalSingleton(Example) self.assertEqual(repr(provider), ''.format( repr(Example), hex(id(provider)))) class DelegatedThreadLocalSingletonTests(unittest.TestCase): def test_inheritance(self): self.assertIsInstance(providers.DelegatedThreadLocalSingleton(object), providers.ThreadLocalSingleton) def test_is_provider(self): self.assertTrue( providers.is_provider( providers.DelegatedThreadLocalSingleton(object))) def test_is_delegated_provider(self): provider = providers.DelegatedThreadLocalSingleton(object) self.assertIs(provider.provide_injection(), provider)