Update types and add tests (ets-labs#480)

Author: rmk135

src/dependency_injector/containers.c

@@ -103,14 +103,14 @@ class DynamicContainer(Container):
 
         return copied
 
-    def __setattr__(self, str name, object value):
+    def __setattr__(self, name, value):
         """Set instance attribute.
 
         If value of attribute is provider, it will be added into providers
         dictionary.
 
         :param name: Attribute's name
-        :type name: str
+        :type name: object
 
         :param value: Attribute's value
         :type value: object
@@ -129,14 +129,14 @@ class DynamicContainer(Container):
 
         super(DynamicContainer, self).__setattr__(name, value)
 
-    def __delattr__(self, str name):
+    def __delattr__(self, name):
         """Delete instance attribute.
 
         If value of attribute is provider, it will be deleted from providers
         dictionary.
 
         :param name: Attribute's name
-        :type name: str
+        :type name: object
 
         :rtype: None
         """
@@ -169,7 +169,7 @@ class DynamicContainer(Container):
 
         :param providers: Dictionary of providers
         :type providers:
-            dict[str, :py:class:`dependency_injector.providers.Provider`]
+            dict[object, :py:class:`dependency_injector.providers.Provider`]
 
         :rtype: None
         """

src/dependency_injector/containers.pyx

@@ -686,3 +686,36 @@ class Container(containers.DeclarativeContainer):
 
         self.assertIs(container.__self__(), container)
         self.assertIs(container.sub_container().__self__(), container.sub_container())
+
+
+class DynamicContainerWithCustomStringTests(unittest.TestCase):
+    # See: https://github.com/ets-labs/python-dependency-injector/issues/479
+
+    class CustomString(str):
+        pass
+
+    class CustomClass:
+        thing = None
+
+    def setUp(self):
+        self.object = self.CustomClass()
+        self.container = containers.DynamicContainer()
+        self.provider = providers.Provider()
+
+    def test_setattr(self):
+        setattr(self.container, self.CustomString('test_attr'), self.provider)
+        self.assertIs(self.container.test_attr, self.provider)
+
+    def test_delattr(self):
+        setattr(self.container, self.CustomString('test_attr'), self.provider)
+        delattr(self.container, self.CustomString('test_attr'))
+        with self.assertRaises(AttributeError):
+            self.container.test_attr
+
+    def test_set_provider(self):
+        self.container.set_provider(self.CustomString('test_attr'), self.provider)
+        self.assertIs(self.container.test_attr, self.provider)
+
+    def test_set_providers(self):
+        self.container.set_providers(**{self.CustomString('test_attr'): self.provider})
+        self.assertIs(self.container.test_attr, self.provider)