Function test_select_across_scrollable_container

tests/test_selection.py:126–148

Selecting from outside (above) to outside (below) of a scrollable container should select all of its content.

()

async def test_select_across_scrollable_container():
    """Selecting from outside (above) to outside (below) of a scrollable
    container should select all of its content."""

    app = _ScrollableSelectApp()
    async with app.run_test(size=(20, 10)) as pilot:
        await pilot.pause()
        scroller = app.query_one("#scroller", VerticalScroll)
        scroller.scroll_to(y=2, animate=False)
        await pilot.pause()

        # Selection: BEFORE (y=0) to AFTER (y=7).
        assert await pilot.mouse_down(offset=(0, 0))
        await pilot.pause()
        assert await pilot.mouse_up(offset=(0, 7))
        selected_text = app.screen.get_selected_text() or ""

        assert "BEFORE" in selected_text
        assert "AFTER" in selected_text
        for i in range(0, 10):
            assert (
                f"item-{i:02d}" in selected_text
            ), f"item-{i:02d} missing from {selected_text!r}"


class _GappedScrollApp(App):