Add test.

Author: WaVEV

tests/model_fields_/test_embedded_model.py

@@ -104,6 +104,11 @@ def test_nested(self):
         )
         self.assertCountEqual(Book.objects.filter(author__address__city="NYC"), [obj])
 
+    def test_field_not_exists(self):
+        msg = "Author has no field named 'first_name'"
+        with self.assertRaisesMessage(FieldDoesNotExist, msg):
+            Book.objects.filter(author__first_name="Bob")
+
     def test_nested_not_exists(self):
         msg = "Unsupported lookup 'president' for CharField 'city'"
         with self.assertRaisesMessage(FieldDoesNotExist, msg):