| // Copyright 2021 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| (function() { |
| |
| class TestHelper { |
| constructor(dp) { |
| this._dp = dp; |
| this._startTicks = performance.now(); |
| } |
| |
| async describeNode(nodeId) { |
| const response = await this._dp.DOM.resolveNode({backendNodeId: nodeId}); |
| return response.result && response.result.object.description ? |
| `<${response.result.object.description}>` : '<invalid id>'; |
| } |
| |
| async patchTimes(obj, fields) { |
| const startTime = (await this._dp.Runtime.evaluate({ |
| expression: 'window.performance.timeOrigin', |
| returnByValue: true})).result.result.value; |
| const endTicks = performance.now(); |
| // Ensure we're using monotonic time within the test duration. |
| const endTime = startTime + (endTicks - this._startTicks); |
| for (const field of fields) { |
| const time = obj[field] * 1000; |
| if (time && (startTime <= time && time <= endTime)) { |
| obj[field] = `<${typeof time}>`; |
| } else if (time) { |
| obj[field] = `FAIL: actual: ${time}, expected: ${startTime} <= time <= ${endTime}`; |
| } |
| } |
| } |
| }; |
| |
| return TestHelper; |
| |
| })() |
