| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>Can subscribe and receive WebDriver BiDi events</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/testdriver.js?feature=bidi"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script> |
| promise_test(async () => { |
| const some_message = "SOME MESSAGE"; |
| // Subscribe to `log.entryAdded` BiDi events. This will not add a listener to the page. |
| await test_driver.bidi.log.entry_added.subscribe(); |
| // Add a listener for the log.entryAdded event. This will not subscribe to the event, so the subscription is |
| // required before. The cleanup is done automatically after the test is finished. |
| const log_entry_promise = test_driver.bidi.log.entry_added.once(); |
| // Emit a console.log message. |
| // Note: Lint rule is disabled in `lint.ignore` file. |
| console.log(some_message); |
| // Wait for the log.entryAdded event to be received. |
| const event = await log_entry_promise; |
| // Assert the log.entryAdded event has the expected message. |
| assert_equals(event.args.length, 1); |
| const event_message = event.args[0]; |
| assert_equals(event_message.value, some_message); |
| }, "Assert testdriver can subscribe and receive events"); |
| </script> |
