test: add IPython client GUI object test module with tab completion

tests/end-2-end/test_bec_gui_ipython.py

@@ -0,0 +1,25 @@
+"""
+Test module for the gui object within the BEC IPython client. 
+"""
+
+from unittest import mock
+
+import IPython
+import pytest
+
+
+@pytest.fixture
+def bec_ipython_shell(connected_client_gui_obj, bec_client_lib):
+    with mock.patch("IPython.core.history.HistoryManager.enabled", False):
+        shell = IPython.terminal.interactiveshell.TerminalInteractiveShell.instance()  # type: ignore
+        shell.user_ns["dev"] = bec_client_lib.device_manager.devices
+        shell.user_ns["gui"] = connected_client_gui_obj
+        completer = IPython.get_ipython().Completer  # type: ignore
+        yield shell, completer
+
+
+def test_ipython_tab_completion(bec_ipython_shell):
+    _, completer = bec_ipython_shell
+    assert "gui.bec" in completer.all_completions("gui.")
+    assert "gui.bec.new" in completer.all_completions("gui.bec.")
+    assert "gui.bec.panels" in completer.all_completions("gui.bec.pan")