Function test_select_remove

tests/test_widget.py:734–768

Test selecting text after a widget is removed. Regression test for https://github.com/Textualize/textual/issues/6452

()

async def test_select_remove():
    """Test selecting text after a widget is removed.

    Regression test for https://github.com/Textualize/textual/issues/6452

    """

    top_text = "Hello, World " * 20
    vanish_text = "This will vanish " * 10

    class SelApp(App):

        BINDINGS = [("space", "vanish")]

        def compose(self) -> ComposeResult:
            yield Static(top_text)
            yield Static(vanish_text, id="vanish")

        def action_vanish(self) -> None:
            self.query_one("#vanish").remove()

    app = SelApp()
    # Simulate mouse down, move to second widget, remove second widget, move mouse, mouse up
    # Prior to the fix this would result in an error as the second widget was no longer attached
    # Post fix, there should be no error, and the selected text should be from the first widget.
    async with app.run_test() as pilot:
        await pilot.mouse_down(offset=(5, 2))
        await pilot.hover(offset=(20, 5))
        await app.query_one("#vanish").remove()
        await pilot.hover(offset=(25, 6))
        await pilot.mouse_up(offset=(30, 5))
        selected_text = app.screen.get_selected_text()
        expected = ", World Hello, World Hello, World Hello, World Hello, World Hello, World Hello, World Hello, World "
        print(repr(selected_text))
        assert selected_text == expected