refactor: Improve enum validation test case for decimal values

Author: vai-mikkoleppanen

tests/validators/test_enums.py

@@ -447,5 +447,11 @@ class MyStrEnum(Enum):
     with pytest.raises(ValidationError):
         v.validate_python((1, 2))
 
+    with pytest.raises(ValidationError):
+        v.validate_python(Decimal(1.1))
+
     with pytest.raises(ValidationError):
         v_str.validate_python(Decimal(1))
+
+    with pytest.raises(ValidationError):
+        v_str.validate_python(Decimal(2.1))