PYTHON-4834 Add __repr__ to IndexModel

- Rename test class

Author: aclark4life

test/test_operations.py

@@ -20,8 +20,9 @@
 from pymongo.collation import Collation
 
 
-class TestOperations(UnitTest):
-    """Test the operations module.""" 
+class TestIndexModel(UnitTest):
+    """Test IndexModel features.""" 
+
     def assertRepr(self, obj):
         new_obj = eval(repr(obj))
         self.assertEqual(type(new_obj), type(obj))