Update tests to pass on Python 2

Author: rmk135

tests/unit/providers/callables/test_callable_py2_py3.py

@@ -1,5 +1,6 @@
 """Callable provider tests."""
 
+import decimal
 import sys
 
 from dependency_injector import providers, errors
@@ -33,7 +34,7 @@ def test_set_provides_returns_():
     "str_name,cls",
     [
         ("dependency_injector.providers.Factory", providers.Factory),
-        ("builtins.list", list),
+        ("decimal.Decimal", decimal.Decimal),
         ("list", list),
         (".common.example", example),
         ("test_is_provider", test_is_provider),

tests/unit/providers/factories/test_factory_py2_py3.py

@@ -1,5 +1,6 @@
 """Factory provider tests."""
 
+import decimal
 import sys
 
 from dependency_injector import providers, errors
@@ -33,7 +34,7 @@ def test_set_provides_returns_():
     "str_name,cls",
     [
         ("dependency_injector.providers.Factory", providers.Factory),
-        ("builtins.list", list),
+        ("decimal.Decimal", decimal.Decimal),
         ("list", list),
         (".common.Example", Example),
         ("test_is_provider", test_is_provider),

tests/unit/providers/resource/test_resource_py35.py

@@ -1,5 +1,6 @@
 """Resource provider tests."""
 
+import decimal
 import sys
 from typing import Any
 
@@ -31,7 +32,7 @@ def test_set_provides_returns_():
     "str_name,cls",
     [
         ("dependency_injector.providers.Factory", providers.Factory),
-        ("builtins.list", list),
+        ("decimal.Decimal", decimal.Decimal),
         ("list", list),
         (".test_resource_py35.test_is_provider", test_is_provider),
         ("test_is_provider", test_is_provider),

tests/unit/providers/singleton/test_singleton_py2_py3.py

@@ -1,5 +1,5 @@
 """Singleton provider tests."""
-
+import decimal
 import sys
 
 from dependency_injector import providers, errors
@@ -53,7 +53,7 @@ def test_set_provides_returns_self(provider):
     "str_name,cls",
     [
         ("dependency_injector.providers.Factory", providers.Factory),
-        ("builtins.list", list),
+        ("decimal.Decimal", decimal.Decimal),
         ("list", list),
         (".common.Example", Example),
         ("test_is_provider", test_is_provider),