Method run

tests/test_concurrency.py:27–34

(self)

            super().__init__()

        def run(self) -> None:
            def write_stuff(text: str) -> None:
                """Write stuff to a widget."""
                self.app.query_one(RichLog).write(text)

            self.app.call_from_thread(write_stuff, "Hello")
            # Exit the app with a code we can assert
            self.app.call_from_thread(self.app.exit, 123)

    class ThreadTestApp(App[object]):
        """Trivial app with a single widget."""