Minor improvements of assertDictContainsSubset method.

PiperOrigin-RevId: 723090148

absl/testing/absltest.py

@@ -1659,21 +1659,17 @@ def CheckEqual(a, b):
   def assertDictContainsSubset(
       self, subset: Mapping[Any, Any], dictionary: Mapping[Any, Any], msg=None
   ):
-    """Raises AssertionError if dictionary is not a superset of subset.
+    """Raises AssertionError if "dictionary" is not a superset of "subset".
 
     Args:
-      subset: A dict, the expected subset of the `dictionary`.
+      subset: A dict, the expected subset of the "dictionary".
       dictionary: A dict, the actual value.
       msg: An optional str, the associated message.
 
     Raises:
-      AssertionError: if dictionary is not a superset of subset.
+      AssertionError: if "dictionary" is not a superset of "subset".
     """
-    if not isinstance(subset, dict):
-      subset = dict(subset)
-    if not isinstance(dictionary, dict):
-      dictionary = dict(dictionary)
-    self.assertDictEqual(dictionary, {**dictionary, **subset}, msg)
+    self.assertDictEqual({**dictionary}, {**dictionary, **subset}, msg)
 
   def assertDictEqual(self, a, b, msg=None):
     """Raises AssertionError if a and b are not equal dictionaries.