| <!DOCTYPE html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/resources/testdriver.js"></script> |
| <script src="/resources/testdriver-vendor.js"></script> |
| <script src="/bluetooth/resources/bluetooth-test.js"></script> |
| <script src="/bluetooth/resources/bluetooth-fake-devices.js"></script> |
| <script> |
| 'use strict'; |
| bluetooth_test(async () => { |
| let expectingEvent = false; |
| let eventHandler; |
| let eventPromise = new Promise((resolve, reject) => { |
| eventHandler = () => { |
| if (expectingEvent) { |
| resolve(); |
| } else { |
| reject('Event fired before garbage collection.'); |
| } |
| }; |
| }); |
| |
| await (async () => { |
| await setBluetoothFakeAdapter('HeartRateAdapter'); |
| let device = await requestDeviceWithTrustedClick({ |
| filters: [{services: ['heart_rate']}]}); |
| let gattServer = await device.gatt.connect(); |
| let service = await gattServer.getPrimaryService('heart_rate'); |
| let characteristic = |
| await service.getCharacteristic('heart_rate_measurement'); |
| await characteristic.startNotifications(); |
| |
| characteristic.addEventListener( |
| 'characteristicvaluechanged', eventHandler, { once: true }); |
| |
| // The characteristic must hold the last reference to the event handler. |
| eventHandler = undefined; |
| })(); |
| |
| // At this point all the variables above should be out of scope and so this |
| // will free them. |
| GCController.collect(); |
| |
| // The event listener should still be active. |
| expectingEvent = true; |
| await eventPromise; |
| }, 'Event listeners remain registered after garbage collection.'); |
| </script> |
