test private attribute used in 'live_info'

adaptive/tests/test_notebook_integration.py

+# -*- coding: utf-8 -*-
+import ipykernel
+import zmq
+
+
+def test_private_api_used_in_live_info():
+    """We are catching all errors in
+    adaptive.notebook_integration.should_update
+    so if ipykernel changed its API it would happen unnoticed."""
+    ctx = zmq.Context()
+    iopub_socket = ctx.socket(zmq.PUB)
+    iopub_thread = ipykernel.iostream.IOPubThread(iopub_socket)
+    assert hasattr(iopub_thread, '_events')