test_pepys_gui.py

async def test_select_platform_type(test_datastore):
    # Test application in a dummy session.
    input = DummyInput()
    # output = DummyOutput()
    output = None

    with create_app_session(output=output, input=input):
        gui = MaintenanceGUI(test_datastore)

        # Run the application.
        # We run it by scheduling the run_async coroutine in the current event
        # loop.
        task = asyncio.create_task(gui.app.run_async())

        ready_event = asyncio.Event()
        gui.app.after_render += lambda _: ready_event.set()
        await ready_event.wait()

        # Send F1 to open the help dialog
        gui.app.key_processor.feed(KeyPress(Keys.F1))
        gui.app.key_processor.process_keys()

        await asyncio.sleep(2)

        # Check the help dialog has opened
        assert isinstance(gui.current_dialog, HelpDialog)

        # Send Tab and Enter to exit the help dialog
        gui.app.key_processor.feed(KeyPress(Keys.Tab, "\t"))
        gui.app.key_processor.feed(KeyPress(Keys.ControlM, "\r"))
        gui.app.key_processor.process_keys()

        await asyncio.sleep(2)

        # Check no dialog is open
        assert gui.current_dialog is None

        # Send ESC to open the 'Do you want to exit?' dialog
        gui.app.key_processor.feed(KeyPress(Keys.Escape))
        gui.app.key_processor.process_keys()

        await asyncio.sleep(2)

        # Send Enter to say yes
        gui.app.key_processor.feed(KeyPress(Keys.ControlM, "\r"))
        gui.app.key_processor.process_keys()

        # Wait for the application to properly terminate.
        await task