Function test_connection_task_cancel

tests/async/test_issues.py:40–55

(page: Page)

async def test_connection_task_cancel(page: Page) -> None:
    await page.set_content("<input />")
    done, pending = await wait(
        {
            create_task(page.wait_for_selector("input")),
            create_task(page.wait_for_selector("#will-never-resolve")),
        },
        return_when=FIRST_COMPLETED,
    )
    assert len(done) == 1
    assert len(pending) == 1
    for task in pending:
        task.cancel()
        with pytest.raises(CancelledError):
            await task
    assert list(pending)[0].cancelled()