python-dependency-injector/tests/unit/providers/test_injections.py

"""Dependency injector injections unit tests."""

import unittest2 as unittest

from dependency_injector import providers


class PositionalInjectionTests(unittest.TestCase):

    def test_isinstance(self):
        injection = providers.PositionalInjection(1)
        self.assertIsInstance(injection, providers.Injection)

    def test_get_value_with_not_provider(self):
        injection = providers.PositionalInjection(123)
        self.assertEquals(injection.get_value(), 123)

    def test_get_value_with_factory(self):
        injection = providers.PositionalInjection(providers.Factory(object))

        obj1 = injection.get_value()
        obj2 = injection.get_value()

        self.assertIs(type(obj1), object)
        self.assertIs(type(obj2), object)
        self.assertIsNot(obj1, obj2)

    def test_get_original_value(self):
        provider = providers.Factory(object)
        injection = providers.PositionalInjection(provider)
        self.assertIs(injection.get_original_value(), provider)

    def test_deepcopy(self):
        provider = providers.Factory(object)
        injection = providers.PositionalInjection(provider)

        injection_copy = providers.deepcopy(injection)

        self.assertIsNot(injection_copy, injection)
        self.assertIsNot(injection_copy.get_original_value(),
                         injection.get_original_value())

    def test_deepcopy_memo(self):
        provider = providers.Factory(object)
        injection = providers.PositionalInjection(provider)
        injection_copy_orig = providers.PositionalInjection(provider)

        injection_copy = providers.deepcopy(
            injection, {id(injection): injection_copy_orig})

        self.assertIs(injection_copy, injection_copy_orig)
        self.assertIs(injection_copy.get_original_value(),
                      injection.get_original_value())


class NamedInjectionTests(unittest.TestCase):

    def test_isinstance(self):
        injection = providers.NamedInjection('name', 1)
        self.assertIsInstance(injection, providers.Injection)

    def test_get_name(self):
        injection = providers.NamedInjection('name', 123)
        self.assertEquals(injection.get_name(), 'name')

    def test_get_value_with_not_provider(self):
        injection = providers.NamedInjection('name', 123)
        self.assertEquals(injection.get_value(), 123)

    def test_get_value_with_factory(self):
        injection = providers.NamedInjection('name',
                                             providers.Factory(object))

        obj1 = injection.get_value()
        obj2 = injection.get_value()

        self.assertIs(type(obj1), object)
        self.assertIs(type(obj2), object)
        self.assertIsNot(obj1, obj2)

    def test_get_original_value(self):
        provider = providers.Factory(object)
        injection = providers.NamedInjection('name', provider)
        self.assertIs(injection.get_original_value(), provider)

    def test_deepcopy(self):
        provider = providers.Factory(object)
        injection = providers.NamedInjection('name', provider)

        injection_copy = providers.deepcopy(injection)

        self.assertIsNot(injection_copy, injection)
        self.assertIsNot(injection_copy.get_original_value(),
                         injection.get_original_value())

    def test_deepcopy_memo(self):
        provider = providers.Factory(object)
        injection = providers.NamedInjection('name', provider)
        injection_copy_orig = providers.NamedInjection('name', provider)

        injection_copy = providers.deepcopy(
            injection, {id(injection): injection_copy_orig})

        self.assertIs(injection_copy, injection_copy_orig)
        self.assertIs(injection_copy.get_original_value(),
                      injection.get_original_value())