Function hook

tests/unit/browsers/test_browser_pool.py:222–232

(
            page_id: str,
            controller: BrowserController,
            browser_new_context_options: dict[str, Any],
            proxy_info: ProxyInfo | None,
        )

        @browser_pool.pre_page_create_hook
        async def hook(
            page_id: str,
            controller: BrowserController,
            browser_new_context_options: dict[str, Any],
            proxy_info: ProxyInfo | None,
        ) -> None:
            await call_mock(page_id, controller, browser_new_context_options, proxy_info)

            browser_new_context_options['user_agent'] = 'Modified User-Agent'

            assert len(controller.pages) == 0

        test_page = await browser_pool.new_page()
        user_agent = await test_page.page.evaluate('navigator.userAgent')