| // Portal tests often need to create portals in a context other than the one |
| // in which the tests are running. This is because the host context may be |
| // discarded during the course of the test. |
| |
| // Opens a blank page for use as a portal host. |
| // Tests cannot simply use window.open() without a URL as about:blank may not |
| // host a portal. |
| async function openBlankPortalHost() { |
| let hostWindow = window.open('/portals/resources/blank-host.html'); |
| await new Promise((resolve) => { |
| hostWindow.addEventListener('load', resolve, {once: true}); |
| }); |
| return hostWindow; |
| } |
