Function run_app

tests/test_gc.py:22–48

Run a dummy app.

()

async def run_app() -> None:
    """Run a dummy app."""

    class DummyApp(App):
        """Dummy app with a few widgets."""

        def compose(self) -> ComposeResult:
            yield Header()
            with Vertical():
                yield Label("foo")
                yield Label("bar")
            yield Footer()

    app = DummyApp()

    async with app.run_test() as pilot:
        # We should have a bunch of DOMNodes while the test is running
        assert count_nodes() > 0
        await pilot.press("ctrl+c")

    assert not app._running

    # Force a GC collection
    gc.collect()

    # After the test, all DOMNodes will have been torn down
    assert count_nodes() == 1


async def _count_app_nodes() -> None: