Add validation test for deprecate local unit.

local_units/serializers.py

@@ -560,10 +560,10 @@ class Meta:
 
     def validate(self, attrs):
         instance = self.instance
-        if instance and instance.is_deprecated and attrs.get("is_deprecated", False):
+        if instance and instance.is_deprecated:
             raise serializers.ValidationError("This object is already deprecated.")
 
-        if attrs.get("is_deprecated", False) and not attrs.get("deprecated_reason"):
+        if not attrs.get("deprecated_reason"):
             raise serializers.ValidationError("A reason must be provided when deprecating an object.")
 
         return attrs

local_units/test_views.py

@@ -85,6 +85,10 @@ def test_deprecate_local_unit(self):
         self.assertEqual(local_unit_obj.is_deprecated, True)
         self.assertEqual(local_unit_obj.deprecated_reason, LocalUnit.DeprecateReason.INCORRECTLY_ADDED)
 
+        # Test for validation
+        response = self.client.post(url, data=data)
+        self.assert_400(response)
+
         # test revert deprecate
         data = {}
         url = f"/api/v2/local-units/{local_unit_obj.id}/revert-deprecate/"