Add tests for calling invalid/unknown plans

tests/service/test_rest_api.py

@@ -101,6 +101,28 @@ def test_put_plan_submits_task(handler: Handler, client: TestClient) -> None:
     )
 
 
+def test_put_plan_with_unknown_plan_name_fails(handler: Handler, client: TestClient) -> None:
+    task_name = "foo"
+    task_params = {"detectors": ["x"]}
+    task_json = {"name": task_name, "params": task_params}
+
+    response = client.post("/tasks", json=task_json)
+
+    assert not handler.worker.get_pending_tasks()
+    assert response.status_code == status.HTTP_400_BAD_REQUEST
+
+
+def test_put_plan_with_bad_params_fails(handler: Handler, client: TestClient) -> None:
+    task_name = "count"
+    task_params = {"motors": ["x"]}
+    task_json = {"name": task_name, "params": task_params}
+
+    response = client.post("/tasks", json=task_json)
+
+    assert not handler.worker.get_pending_tasks()
+    assert response.status_code == status.HTTP_400_BAD_REQUEST
+
+
 def test_get_state_updates(handler: Handler, client: TestClient) -> None:
     assert client.get("/worker/state").text == f'"{WorkerState.IDLE.name}"'
     handler.worker._on_state_change(  # type: ignore