Method attach_frame

tests/async/utils.py:29–43

(self, page: Page, frame_id: str, url: str)

class Utils:
    async def attach_frame(self, page: Page, frame_id: str, url: str) -> Frame:
        handle = await page.evaluate_handle(
            """async ({ frame_id, url }) => {
                const frame = document.createElement('iframe');
                frame.src = url;
                frame.id = frame_id;
                document.body.appendChild(frame);
                await new Promise(x => frame.onload = x);
                return frame;
            }""",
            {"frame_id": frame_id, "url": url},
        )
        frame = await cast(ElementHandle, handle.as_element()).content_frame()
        assert frame
        return frame

    async def detach_frame(self, page: Page, frame_id: str) -> None:
        await page.evaluate(