Deprecate assertDictContainsSubset()

2 files changed, 4 insertions, 1 deletions

diff --git a/Lib/unittest/case.py b/Lib/unittest/case.py
index b02d475..15c7eee 100644
--- a/Lib/unittest/case.py
+++ b/Lib/unittest/case.py
@@ -934,6 +934,8 @@ class TestCase(object):
 
     def assertDictContainsSubset(self, subset, dictionary, msg=None):
         """Checks whether dictionary is a superset of subset."""
+        warnings.warn('assertDictContainsSubset is deprecated',
+                      DeprecationWarning)
         missing = []
         mismatched = []
         for key, value in subset.items():
diff --git a/Lib/unittest/test/test_case.py b/Lib/unittest/test/test_case.py
index 3ad883d..3376428 100644
--- a/Lib/unittest/test/test_case.py
+++ b/Lib/unittest/test/test_case.py
@@ -1079,6 +1079,7 @@ test case
             (self.failUnlessRaises, (TypeError, lambda _: 3.14 + 'spam')),
             (self.failIf, (False,)),
             (self.assertSameElements, ([1, 1, 2, 3], [1, 2, 3])),
+            (self.assertDictContainsSubset, (dict(a=1, b=2), dict(a=1, b=2, c=3))),
             (self.assertRaisesRegexp, (KeyError, 'foo', lambda: {}['foo'])),
             (self.assertRegexpMatches, ('bar', 'bar')),
         )
@@ -1093,7 +1094,7 @@ test case
         deprecated_names = [
             'failIfEqual', 'failUnlessEqual', 'failUnlessAlmostEqual',
             'failIfAlmostEqual', 'failUnless', 'failUnlessRaises', 'failIf',
-            'assertSameElements'
+            'assertSameElements', 'assertDictContainsSubset',
         ]
         for deprecated_name in deprecated_names:
             with self.assertRaises(AttributeError):