{ "verdict": "APPROVED", "rejection_reason": "NONE", "audit_details": { "target_invoked": true, "pre_conditions_tested": true, "post_conditions_tested": true, "test_data_used": true }, "feedback": "The test suite robustly verifies the

MigrationEngine
 contracts. It avoids Tautologies by cleanly substituting IdMappingService without mocking the engine itself. Cross-filter parsing asserts against hard-coded, predefined validation dictionaries (no Logic Mirroring). It successfully addresses @PRE negative cases (e.g. invalid zip paths, missing YAMLs) and rigorously validates @POST file transformations (e.g. in-place UUID substitutions and archive reconstruction)." }

backend/tests/core/test_defensive_guards.py

@@ -1,5 +1,10 @@
+import sys
+from pathlib import Path
 import pytest
 from unittest.mock import MagicMock
+
+sys.path.insert(0, str(Path(__file__).parent.parent.parent))
+
 from src.services.git_service import GitService
 from src.core.superset_client import SupersetClient
 from src.core.config_models import Environment

backend/tests/core/test_mapping_service.py

@@ -35,7 +35,7 @@ class MockSupersetClient:
     def __init__(self, resources):
         self.resources = resources
 
-    def get_all_resources(self, endpoint):
+    def get_all_resources(self, endpoint, since_dttm=None):
         return self.resources.get(endpoint, [])
 
 def test_sync_environment_upserts_correctly(db_session):
@@ -147,7 +147,7 @@ def test_sync_environment_skips_resources_without_uuid(db_session):
 def test_sync_environment_handles_api_error_gracefully(db_session):
     """If one resource type fails, others should still sync."""
     class FailingClient:
-        def get_all_resources(self, endpoint):
+        def get_all_resources(self, endpoint, since_dttm=None):
             if endpoint == "chart":
                 raise ConnectionError("API timeout")
             if endpoint == "dataset":
@@ -217,4 +217,33 @@ def test_sync_environment_requires_existing_env(db_session):
     assert db_session.query(ResourceMapping).count() == 0
 
 
+
+def test_sync_environment_deletes_stale_mappings(db_session):
+    """Verify that mappings for resources deleted from the remote environment
+    are removed from the local DB on the next sync cycle."""
+    service = IdMappingService(db_session)
+
+    # First sync: 2 charts exist
+    client_v1 = MockSupersetClient({
+        "chart": [
+            {"id": 1, "uuid": "aaa", "slice_name": "Chart A"},
+            {"id": 2, "uuid": "bbb", "slice_name": "Chart B"},
+        ]
+    })
+    service.sync_environment("env1", client_v1)
+    assert db_session.query(ResourceMapping).filter_by(environment_id="env1").count() == 2
+
+    # Second sync: user deleted Chart B from superset
+    client_v2 = MockSupersetClient({
+        "chart": [
+            {"id": 1, "uuid": "aaa", "slice_name": "Chart A"},
+        ]
+    })
+    service.sync_environment("env1", client_v2)
+
+    remaining = db_session.query(ResourceMapping).filter_by(environment_id="env1").all()
+    assert len(remaining) == 1
+    assert remaining[0].uuid == "aaa"
+
+
 # [/DEF:backend.tests.core.test_mapping_service:Module]