adding

tests/functional/adapter/constraints/test_constraints.py

@@ -153,18 +153,17 @@ def models(self):
             "my_model.sql": my_model_sql,
             "constraints_schema.yml": model_schema_yml,
         }
-
     @pytest.fixture(scope="class")
-    def null_model_sql(self):
-        return my_model_with_nulls_sql
-
+    def expected_error_messages(self):
+        return  [""]
+    
     @pytest.fixture(scope="class")
     def expected_color(self):
         return "blue"
-
+    
     @pytest.fixture(scope="class")
-    def expected_error_messages(self):
-        return ['null value in column "id"', "violates not-null constraint"]
+    def null_model_sql(self):
+        return my_model_with_nulls_sql
 
     def assert_expected_error_messages(self, error_message, expected_error_messages):
         print(msg in error_message for msg in expected_error_messages)
@@ -175,14 +174,14 @@ def test__constraints_enforcement_rollback(
     ):
         # print(expected_error_messages)
         results = run_dbt(["run", "-s", "my_model"])
-        # print(results)
+        print(results)
 
         assert len(results) == 1
 
 #         # Make a contract-breaking change to the model
         write_file(null_model_sql, "models", "my_model.sql")
 
-        failing_results = run_dbt(["run", "-s", "my_model"], expect_pass=True)
+        failing_results = run_dbt(["run", "-s", "my_model"], expect_pass=False)
         # print("start",failing_results[0].message,"endhere", len(failing_results))
         assert len(failing_results) == 1
 
@@ -230,50 +229,6 @@ def test__constraints_enforcement_rollback(
 #     def null_model_sql(self):
 #         return my_model_with_nulls_sql
 
-
-my_incremental_model_sql = """
-{{
-  config(
-    materialized = "incremental",
-    on_schema_change='append_new_columns'
-  )
-}}
-
-select
-  1 as id,
-  'blue' as color,
-  '2019-01-01' as date_day
-"""
-
-my_model_incremental_with_nulls_sql = """
-{{
-  config(
-    materialized = "incremental",
-    on_schema_change='append_new_columns'  )
-}}
-
-select
-  -- null value for 'id'
-  cast(null as {{ dbt.type_int() }}) as id,
-  -- change the color as well (to test rollback)
-  'red' as color,
-  '2019-01-01' as date_day
-"""
-
-class BaseIncrementalConstraintsRollback(BaseConstraintsRollback):
-    @pytest.fixture(scope="class")
-    def models(self):
-        return {
-            "my_model.sql": my_incremental_model_sql,
-            "constraints_schema.yml": model_schema_yml,
-        }
-
-    @pytest.fixture(scope="class")
-    def null_model_sql(self):
-        return my_model_incremental_with_nulls_sql
-
-
-
 class TestIncrementalConstraintsRollback(BaseIncrementalConstraintsRollback):
     # pass