vdk-dag: fix failing validation tests

Why?

Tests started failing after #2666
Most likely due to not wrapping errors in UserCodeError anymore

What?

Pass the dag name to the dag validation test fixture

Expect just one request in the dag, as we do a GET request
to fetch the job info before doing validation

How was this tested?

Ran test suite locally

What kind of change is this?

Bugfix

Signed-off-by: Dilyan Marinov <[email protected]>

projects/vdk-plugins/vdk-dag/tests/test_dag.py

@@ -226,8 +226,9 @@ def _assert_dag_fails_with_error(self, result, error):
             self.env_vars,
         ):
             assert isinstance(result.exception, error)
+            # only the request that fetches the job info should be present
             # no other request should be tried as the DAG fails
-            assert len(self.httpserver.log) == 0
+            assert len(self.httpserver.log) == 1
 
     def test_dag(self):
         dag = "dag"
@@ -427,7 +428,7 @@ def test_dag_execution_type_propagation(self):
             self.httpserver.stop()
 
     def _test_dag_validation(self, dag_name):
-        self._set_up()
+        self._set_up(dag_name=dag_name)
         with mock.patch.dict(
             os.environ,
             self.env_vars,