Add unit tests

tests/unit/providers/test_container_py2_py3.py

@@ -0,0 +1,54 @@
+"""Dependency injector container provider unit tests."""
+
+import copy
+
+import unittest2 as unittest
+
+from dependency_injector import containers, providers
+
+
+TEST_VALUE_1 = 'core_section_value1'
+TEST_CONFIG_1 = {
+    'core': {
+        'section': {
+            'value': TEST_VALUE_1,
+        },
+    },
+}
+
+TEST_VALUE_2 = 'core_section_value2'
+TEST_CONFIG_2 = {
+    'core': {
+        'section': {
+            'value': TEST_VALUE_2,
+        },
+    },
+}
+
+
+def _copied(value):
+    return copy.deepcopy(value)
+
+
+class TestCore(containers.DeclarativeContainer):
+    config = providers.Configuration('core')
+    value_getter = providers.Callable(lambda _: _, config.section.value)
+
+
+class TestApplication(containers.DeclarativeContainer):
+    config = providers.Configuration('config')
+    core = providers.Container(TestCore, config=config.core)
+    dict_factory = providers.Factory(dict, value=core.value_getter)
+
+
+class ContainerTests(unittest.TestCase):
+
+    def test(self):
+        application = TestApplication(config=_copied(TEST_CONFIG_1))
+        self.assertEqual(application.dict_factory(), {'value': TEST_VALUE_1})
+
+    def test_double_override(self):
+        application = TestApplication()
+        application.config.override(_copied(TEST_CONFIG_1))
+        application.config.override(_copied(TEST_CONFIG_2))
+        self.assertEqual(application.dict_factory(), {'value': TEST_VALUE_2})