Add fixture to create grants/roles for test purposes

tests/functional/adapter/conftest.py

@@ -1,4 +1,36 @@
 import pytest
+import os
+
+from dbt.exceptions import DbtDatabaseError
+
+# This is a hack to prevent the fixture from running more than once
+GRANTS_AND_ROLES_SETUP = False
+
+
+@pytest.fixture(scope="class", autouse=True)
+def setup_grants_and_roles(project):
+    global GRANTS_AND_ROLES_SETUP
+    groups = [
+        os.environ[env_var] for env_var in os.environ if env_var.startswith("DBT_TEST_GROUP_")
+    ]
+    roles = [os.environ[env_var] for env_var in os.environ if env_var.startswith("DBT_TEST_ROLE_")]
+    if not GRANTS_AND_ROLES_SETUP:
+        with project.adapter.connection_named("__test"):
+            for group in groups:
+                try:
+                    project.adapter.execute(f"CREATE GROUP {group}")
+                except DbtDatabaseError:
+                    # This is expected if the group already exists
+                    pass
+
+            for role in roles:
+                try:
+                    project.adapter.execute(f"CREATE ROLE {role}")
+                except DbtDatabaseError:
+                    # This is expected if the group already exists
+                    pass
+
+            GRANTS_AND_ROLES_SETUP = True
 
 
 @pytest.fixture

tests/functional/adapter/grants/test_model_grants.py

@@ -129,7 +129,7 @@
 """
 
 
-class BaseModelGrantsRedshift(BaseGrantsRedshift):
+class TestModelGrantsRedshift(BaseGrantsRedshift):
     @pytest.fixture(scope="class")
     def models(self):
         updated_schema = self.interpolate_name_overrides(model_schema_yml)