Test for providers.Singleton

objects/providers.py

@@ -129,7 +129,7 @@ class Singleton(NewInstance):
             self.instance = super(Singleton, self).__call__(*args, **kwargs)
         return self.instance
 
-    def _reset_instance(self):
+    def reset(self):
         """Reset instance."""
         self.instance = None
 
@@ -152,12 +152,12 @@ class Scoped(Singleton):
     def in_scope(self):
         """Set provider in "in scope" state."""
         self.is_in_scope = True
-        self._reset_instance()
+        self.reset()
 
     def out_of_scope(self):
         """Set provider in "out of scope" state."""
         self.is_in_scope = False
-        self._reset_instance()
+        self.reset()
 
     def __call__(self, *args, **kwargs):
         """Return provided instance."""

tests/test_providers.py

@@ -256,3 +256,33 @@ class NewInstanceTest(unittest.TestCase):
         self.assertIsNot(instance1, instance2)
         self.assertIsInstance(instance1, list)
         self.assertIsInstance(instance2, list)
+
+
+class SingletonTest(unittest.TestCase):
+
+    """Singleton test cases."""
+
+    def test_call(self):
+        """Test creation and returning of single object."""
+        provider = Singleton(object)
+
+        instance1 = provider()
+        instance2 = provider()
+
+        self.assertIsInstance(instance1, object)
+        self.assertIsInstance(instance2, object)
+        self.assertIs(instance1, instance2)
+
+    def test_reset(self):
+        """Test creation and reset of single object."""
+        provider = Singleton(object)
+
+        instance1 = provider()
+        self.assertIsInstance(instance1, object)
+
+        provider.reset()
+
+        instance2 = provider()
+        self.assertIsInstance(instance1, object)
+
+        self.assertIsNot(instance1, instance2)