From fa113af97754d3f1eb3fc725b18ae8ba5488e71d Mon Sep 17 00:00:00 2001
From: Roman Mogilatov <roman.mogilatov@cupid.com>
Date: Sun, 15 Mar 2015 00:50:24 +0200
Subject: [PATCH] Test for providers.Singleton

---
 objects/providers.py    |  6 +++---
 tests/test_providers.py | 30 ++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/objects/providers.py b/objects/providers.py
index bef02325..e8a5c1ee 100644
--- a/objects/providers.py
+++ b/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."""
diff --git a/tests/test_providers.py b/tests/test_providers.py
index bf2af1cf..b5ee24ab 100644
--- a/tests/test_providers.py
+++ b/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)