mirror of
https://github.com/ets-labs/python-dependency-injector.git
synced 2024-11-22 09:36:48 +03:00
289 lines
9.1 KiB
Python
289 lines
9.1 KiB
Python
"""Objects providers unittests."""
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import unittest2 as unittest
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from collections import namedtuple
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from objects.providers import Provider
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from objects.providers import Delegate
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from objects.providers import NewInstance
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from objects.providers import Singleton
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from objects.providers import Scoped
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from objects.providers import ExternalDependency
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from objects.providers import Class
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from objects.providers import Object
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from objects.providers import Function
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from objects.providers import Value
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from objects.providers import Callable
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from objects.providers import Config
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from objects.injections import InitArg
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from objects.injections import Attribute
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from objects.injections import Method
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from objects.utils import is_provider
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from objects.errors import Error
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class ProviderTest(unittest.TestCase):
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"""Provider test cases."""
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def setUp(self):
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"""Set test cases environment up."""
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self.provider = Provider()
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def test_is_provider(self):
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"""Test `is_provider` check."""
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self.assertTrue(is_provider(self.provider))
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def test_call(self):
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"""Test call."""
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self.assertRaises(NotImplementedError, self.provider.__call__)
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def test_delegate(self):
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"""Test creating of provider delegation."""
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delegate1 = self.provider.delegate()
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self.assertIsInstance(delegate1, Delegate)
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self.assertIs(delegate1.delegated, self.provider)
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delegate2 = self.provider.delegate()
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self.assertIsInstance(delegate2, Delegate)
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self.assertIs(delegate2.delegated, self.provider)
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self.assertIsNot(delegate1, delegate2)
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def test_override(self):
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"""Test provider overriding."""
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overriding_provider = Provider()
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self.provider.override(overriding_provider)
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self.assertTrue(self.provider.overridden)
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def test_override_with_not_provider(self):
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"""Test provider overriding with not provider instance."""
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self.assertRaises(Error, self.provider.override, object())
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def test_last_overriding(self):
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"""Test getting last overriding provider."""
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overriding_provider1 = Provider()
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overriding_provider2 = Provider()
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self.provider.override(overriding_provider1)
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self.assertIs(self.provider.last_overriding, overriding_provider1)
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self.provider.override(overriding_provider2)
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self.assertIs(self.provider.last_overriding, overriding_provider2)
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def test_last_overriding_of_not_overridden_provider(self):
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"""Test getting last overriding from not overridden provider."""
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try:
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self.provider.last_overriding
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except Error:
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pass
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else:
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self.fail('Got en error in {}'.format(
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str(self.test_last_overriding_of_not_overridden_provider)))
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class DelegateTest(unittest.TestCase):
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"""Delegate test cases."""
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def setUp(self):
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"""Set test cases environment up."""
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self.delegated = Provider()
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self.delegate = Delegate(delegated=self.delegated)
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def test_is_provider(self):
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"""Test `is_provider` check."""
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self.assertTrue(is_provider(self.delegate))
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def test_init_with_not_provider(self):
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"""Test that delegate accepts only another provider as delegated."""
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self.assertRaises(Error, Delegate, delegated=object())
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def test_call(self):
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""" Test returning of delegated provider."""
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delegated1 = self.delegate()
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delegated2 = self.delegate()
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self.assertIs(delegated1, self.delegated)
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self.assertIs(delegated2, self.delegated)
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class NewInstanceTest(unittest.TestCase):
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"""NewInstance test cases."""
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class Example(object):
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"""Example class for NewInstance provider tests."""
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def __init__(self, init_arg1=None, init_arg2=None):
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"""Initializer.
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:param init_arg1:
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:param init_arg2:
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:return:
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"""
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self.init_arg1 = init_arg1
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self.init_arg2 = init_arg2
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self.attribute1 = None
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self.attribute2 = None
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self.method1_value = None
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self.method2_value = None
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def method1(self, value):
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"""Setter method 1."""
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self.method1_value = value
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def method2(self, value):
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"""Setter method 2."""
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self.method2_value = value
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def test_is_provider(self):
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"""Test `is_provider` check."""
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self.assertTrue(is_provider(NewInstance(self.Example)))
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def test_init_with_not_class(self):
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"""Test creation of provider with not a class."""
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self.assertRaises(Error, NewInstance, 123)
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def test_call(self):
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"""Test creation of new instances."""
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provider = NewInstance(self.Example)
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instance1 = provider()
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instance2 = provider()
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self.assertIsNot(instance1, instance2)
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self.assertIsInstance(instance1, self.Example)
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self.assertIsInstance(instance2, self.Example)
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def test_call_with_init_args(self):
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"""Test creation of new instances with init args injections."""
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provider = NewInstance(self.Example,
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InitArg('init_arg1', 'i1'),
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InitArg('init_arg2', 'i2'))
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instance1 = provider()
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instance2 = provider()
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self.assertEqual(instance1.init_arg1, 'i1')
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self.assertEqual(instance1.init_arg2, 'i2')
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self.assertEqual(instance2.init_arg1, 'i1')
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self.assertEqual(instance2.init_arg2, 'i2')
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self.assertIsNot(instance1, instance2)
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self.assertIsInstance(instance1, self.Example)
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self.assertIsInstance(instance2, self.Example)
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def test_call_with_attributes(self):
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"""Test creation of new instances with attribute injections."""
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provider = NewInstance(self.Example,
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Attribute('attribute1', 'a1'),
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Attribute('attribute2', 'a2'))
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instance1 = provider()
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instance2 = provider()
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self.assertEqual(instance1.attribute1, 'a1')
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self.assertEqual(instance1.attribute2, 'a2')
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self.assertEqual(instance2.attribute1, 'a1')
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self.assertEqual(instance2.attribute2, 'a2')
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self.assertIsNot(instance1, instance2)
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self.assertIsInstance(instance1, self.Example)
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self.assertIsInstance(instance2, self.Example)
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def test_call_with_methods(self):
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"""Test creation of new instances with method injections."""
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provider = NewInstance(self.Example,
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Method('method1', 'm1'),
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Method('method2', 'm2'))
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instance1 = provider()
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instance2 = provider()
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self.assertEqual(instance1.method1_value, 'm1')
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self.assertEqual(instance1.method2_value, 'm2')
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self.assertEqual(instance2.method1_value, 'm1')
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self.assertEqual(instance2.method2_value, 'm2')
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self.assertIsNot(instance1, instance2)
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self.assertIsInstance(instance1, self.Example)
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self.assertIsInstance(instance2, self.Example)
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def test_call_with_context_args(self):
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"""Test creation of new instances with context args."""
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provider = NewInstance(self.Example)
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instance = provider(11, 22)
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self.assertEqual(instance.init_arg1, 11)
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self.assertEqual(instance.init_arg2, 22)
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def test_call_with_context_kwargs(self):
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"""Test creation of new instances with context kwargs."""
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provider = NewInstance(self.Example,
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InitArg('init_arg1', 1))
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instance1 = provider(init_arg2=22)
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self.assertEqual(instance1.init_arg1, 1)
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self.assertEqual(instance1.init_arg2, 22)
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instance1 = provider(init_arg1=11, init_arg2=22)
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self.assertEqual(instance1.init_arg1, 11)
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self.assertEqual(instance1.init_arg2, 22)
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def test_call_overridden(self):
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"""Test creation of new instances on overridden provider."""
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provider = NewInstance(self.Example)
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overriding_provider1 = NewInstance(dict)
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overriding_provider2 = NewInstance(list)
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provider.override(overriding_provider1)
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provider.override(overriding_provider2)
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instance1 = provider()
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instance2 = provider()
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self.assertIsNot(instance1, instance2)
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self.assertIsInstance(instance1, list)
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self.assertIsInstance(instance2, list)
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class SingletonTest(unittest.TestCase):
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"""Singleton test cases."""
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def test_call(self):
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"""Test creation and returning of single object."""
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provider = Singleton(object)
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instance1 = provider()
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instance2 = provider()
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self.assertIsInstance(instance1, object)
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self.assertIsInstance(instance2, object)
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self.assertIs(instance1, instance2)
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def test_reset(self):
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"""Test creation and reset of single object."""
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provider = Singleton(object)
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instance1 = provider()
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self.assertIsInstance(instance1, object)
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provider.reset()
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instance2 = provider()
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self.assertIsInstance(instance1, object)
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self.assertIsNot(instance1, instance2)
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