701 lines
27 KiB
TypeScript
701 lines
27 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {Provider} from '@angular/core';
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import {AsyncTestCompleter, beforeEach, describe, expect, inject, it} from '@angular/core/testing/testing_internal';
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import {Metric, Options, PerfLogEvent, PerfLogFeatures, PerflogMetric, ReflectiveInjector, WebDriverExtension} from '../../index';
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import {isPresent} from '../../src/facade/lang';
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import {TraceEventFactory} from '../trace_event_factory';
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export function main() {
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let commandLog: any[];
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const eventFactory = new TraceEventFactory('timeline', 'pid0');
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function createMetric(
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perfLogs: PerfLogEvent[], perfLogFeatures: PerfLogFeatures,
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{microMetrics, forceGc, captureFrames, receivedData, requestCount}: {
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microMetrics?: {[key: string]: string},
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forceGc?: boolean,
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captureFrames?: boolean,
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receivedData?: boolean,
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requestCount?: boolean
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} = {}): Metric {
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commandLog = [];
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if (!perfLogFeatures) {
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perfLogFeatures =
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new PerfLogFeatures({render: true, gc: true, frameCapture: true, userTiming: true});
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}
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if (!microMetrics) {
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microMetrics = {};
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}
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const providers: Provider[] = [
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Options.DEFAULT_PROVIDERS, PerflogMetric.PROVIDERS,
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{provide: Options.MICRO_METRICS, useValue: microMetrics}, {
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provide: PerflogMetric.SET_TIMEOUT,
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useValue: (fn: Function, millis: number) => {
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commandLog.push(['setTimeout', millis]);
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fn();
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},
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},
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{
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provide: WebDriverExtension,
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useValue: new MockDriverExtension(perfLogs, commandLog, perfLogFeatures)
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}
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];
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if (isPresent(forceGc)) {
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providers.push({provide: Options.FORCE_GC, useValue: forceGc});
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}
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if (isPresent(captureFrames)) {
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providers.push({provide: Options.CAPTURE_FRAMES, useValue: captureFrames});
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}
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if (isPresent(receivedData)) {
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providers.push({provide: Options.RECEIVED_DATA, useValue: receivedData});
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}
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if (isPresent(requestCount)) {
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providers.push({provide: Options.REQUEST_COUNT, useValue: requestCount});
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}
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return ReflectiveInjector.resolveAndCreate(providers).get(PerflogMetric);
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}
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describe('perflog metric', () => {
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function sortedKeys(stringMap: {[key: string]: any}) {
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const res: string[] = [];
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res.push(...Object.keys(stringMap));
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res.sort();
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return res;
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}
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it('should describe itself based on the perfLogFeatrues', () => {
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expect(sortedKeys(createMetric([[]], new PerfLogFeatures()).describe())).toEqual([
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'pureScriptTime', 'scriptTime'
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]);
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expect(
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sortedKeys(createMetric([[]], new PerfLogFeatures({render: true, gc: false})).describe()))
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.toEqual(['pureScriptTime', 'renderTime', 'scriptTime']);
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expect(sortedKeys(createMetric([[]], null).describe())).toEqual([
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'gcAmount', 'gcTime', 'majorGcTime', 'pureScriptTime', 'renderTime', 'scriptTime'
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]);
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expect(sortedKeys(createMetric([[]], new PerfLogFeatures({render: true, gc: true}), {
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forceGc: true
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}).describe()))
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.toEqual([
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'forcedGcAmount', 'forcedGcTime', 'gcAmount', 'gcTime', 'majorGcTime', 'pureScriptTime',
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'renderTime', 'scriptTime'
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]);
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expect(sortedKeys(createMetric([[]], new PerfLogFeatures({userTiming: true}), {
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receivedData: true,
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requestCount: true
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}).describe()))
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.toEqual(['pureScriptTime', 'receivedData', 'requestCount', 'scriptTime']);
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});
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it('should describe itself based on micro metrics', () => {
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const description =
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createMetric([[]], null, {microMetrics: {'myMicroMetric': 'someDesc'}}).describe();
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expect(description['myMicroMetric']).toEqual('someDesc');
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});
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it('should describe itself if frame capture is requested and available', () => {
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const description = createMetric([[]], new PerfLogFeatures({frameCapture: true}), {
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captureFrames: true
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}).describe();
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expect(description['frameTime.mean']).not.toContain('WARNING');
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expect(description['frameTime.best']).not.toContain('WARNING');
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expect(description['frameTime.worst']).not.toContain('WARNING');
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expect(description['frameTime.smooth']).not.toContain('WARNING');
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});
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it('should describe itself if frame capture is requested and not available', () => {
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const description = createMetric([[]], new PerfLogFeatures({frameCapture: false}), {
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captureFrames: true
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}).describe();
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expect(description['frameTime.mean']).toContain('WARNING');
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expect(description['frameTime.best']).toContain('WARNING');
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expect(description['frameTime.worst']).toContain('WARNING');
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expect(description['frameTime.smooth']).toContain('WARNING');
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});
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describe('beginMeasure', () => {
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it('should not force gc and mark the timeline',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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const metric = createMetric([[]], null);
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metric.beginMeasure().then((_) => {
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expect(commandLog).toEqual([['timeBegin', 'benchpress0']]);
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async.done();
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});
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}));
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it('should force gc and mark the timeline',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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const metric = createMetric([[]], null, {forceGc: true});
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metric.beginMeasure().then((_) => {
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expect(commandLog).toEqual([['gc'], ['timeBegin', 'benchpress0']]);
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async.done();
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});
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}));
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});
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describe('endMeasure', () => {
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it('should mark and aggregate events in between the marks',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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const events = [[
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eventFactory.markStart('benchpress0', 0), eventFactory.start('script', 4),
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eventFactory.end('script', 6), eventFactory.markEnd('benchpress0', 10)
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]];
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const metric = createMetric(events, null);
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metric.beginMeasure().then((_) => metric.endMeasure(false)).then((data) => {
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expect(commandLog).toEqual([
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['timeBegin', 'benchpress0'], ['timeEnd', 'benchpress0', null], 'readPerfLog'
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]);
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expect(data['scriptTime']).toBe(2);
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async.done();
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});
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}));
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it('should mark and aggregate events since navigationStart',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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const events = [[
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eventFactory.markStart('benchpress0', 0), eventFactory.start('script', 4),
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eventFactory.end('script', 6), eventFactory.instant('navigationStart', 7),
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eventFactory.start('script', 8), eventFactory.end('script', 9),
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eventFactory.markEnd('benchpress0', 10)
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]];
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const metric = createMetric(events, null);
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metric.beginMeasure().then((_) => metric.endMeasure(false)).then((data) => {
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expect(data['scriptTime']).toBe(1);
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async.done();
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});
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}));
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it('should restart timing', inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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const events = [
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[
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eventFactory.markStart('benchpress0', 0),
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eventFactory.markEnd('benchpress0', 1),
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eventFactory.markStart('benchpress1', 2),
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],
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[eventFactory.markEnd('benchpress1', 3)]
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];
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const metric = createMetric(events, null);
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metric.beginMeasure()
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.then((_) => metric.endMeasure(true))
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.then((_) => metric.endMeasure(true))
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.then((_) => {
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expect(commandLog).toEqual([
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['timeBegin', 'benchpress0'], ['timeEnd', 'benchpress0', 'benchpress1'],
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'readPerfLog', ['timeEnd', 'benchpress1', 'benchpress2'], 'readPerfLog'
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]);
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async.done();
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});
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}));
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it('should loop and aggregate until the end mark is present',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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const events = [
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[eventFactory.markStart('benchpress0', 0), eventFactory.start('script', 1)],
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[eventFactory.end('script', 2)],
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[
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eventFactory.start('script', 3), eventFactory.end('script', 5),
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eventFactory.markEnd('benchpress0', 10)
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]
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];
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const metric = createMetric(events, null);
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metric.beginMeasure().then((_) => metric.endMeasure(false)).then((data) => {
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expect(commandLog).toEqual([
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['timeBegin', 'benchpress0'], ['timeEnd', 'benchpress0', null], 'readPerfLog',
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['setTimeout', 100], 'readPerfLog', ['setTimeout', 100], 'readPerfLog'
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]);
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expect(data['scriptTime']).toBe(3);
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async.done();
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});
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}));
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it('should store events after the end mark for the next call',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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const events = [
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[
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eventFactory.markStart('benchpress0', 0), eventFactory.markEnd('benchpress0', 1),
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eventFactory.markStart('benchpress1', 1), eventFactory.start('script', 1),
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eventFactory.end('script', 2)
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],
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[
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eventFactory.start('script', 3), eventFactory.end('script', 5),
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eventFactory.markEnd('benchpress1', 6)
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]
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];
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const metric = createMetric(events, null);
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metric.beginMeasure()
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.then((_) => metric.endMeasure(true))
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.then((data) => {
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expect(data['scriptTime']).toBe(0);
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return metric.endMeasure(true);
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})
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.then((data) => {
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expect(commandLog).toEqual([
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['timeBegin', 'benchpress0'], ['timeEnd', 'benchpress0', 'benchpress1'],
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'readPerfLog', ['timeEnd', 'benchpress1', 'benchpress2'], 'readPerfLog'
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]);
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expect(data['scriptTime']).toBe(3);
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async.done();
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});
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}));
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describe('with forced gc', () => {
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let events: PerfLogEvent[][];
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beforeEach(() => {
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events = [[
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eventFactory.markStart('benchpress0', 0), eventFactory.start('script', 4),
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eventFactory.end('script', 6), eventFactory.markEnd('benchpress0', 10),
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eventFactory.markStart('benchpress1', 11),
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eventFactory.start('gc', 12, {'usedHeapSize': 2500}),
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eventFactory.end('gc', 15, {'usedHeapSize': 1000}),
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eventFactory.markEnd('benchpress1', 20)
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]];
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});
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it('should measure forced gc', inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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const metric = createMetric(events, null, {forceGc: true});
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metric.beginMeasure().then((_) => metric.endMeasure(false)).then((data) => {
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expect(commandLog).toEqual([
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['gc'], ['timeBegin', 'benchpress0'], ['timeEnd', 'benchpress0', 'benchpress1'],
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'readPerfLog', ['gc'], ['timeEnd', 'benchpress1', null], 'readPerfLog'
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]);
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expect(data['forcedGcTime']).toBe(3);
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expect(data['forcedGcAmount']).toBe(1.5);
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async.done();
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});
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}));
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it('should restart after the forced gc if needed',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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const metric = createMetric(events, null, {forceGc: true});
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metric.beginMeasure().then((_) => metric.endMeasure(true)).then((data) => {
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expect(commandLog[5]).toEqual(['timeEnd', 'benchpress1', 'benchpress2']);
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async.done();
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});
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}));
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});
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});
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describe('aggregation', () => {
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function aggregate(events: any[], {microMetrics, captureFrames, receivedData, requestCount}: {
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microMetrics?: {[key: string]: string},
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captureFrames?: boolean,
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receivedData?: boolean,
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requestCount?: boolean
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} = {}) {
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events.unshift(eventFactory.markStart('benchpress0', 0));
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events.push(eventFactory.markEnd('benchpress0', 10));
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const metric = createMetric([events], null, {
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microMetrics: microMetrics,
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captureFrames: captureFrames,
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receivedData: receivedData,
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requestCount: requestCount
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});
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return metric.beginMeasure().then((_) => metric.endMeasure(false));
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}
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describe('frame metrics', () => {
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it('should calculate mean frame time',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate(
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[
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eventFactory.markStart('frameCapture', 0), eventFactory.instant('frame', 1),
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eventFactory.instant('frame', 3), eventFactory.instant('frame', 4),
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eventFactory.markEnd('frameCapture', 5)
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],
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{captureFrames: true})
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.then((data) => {
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expect(data['frameTime.mean']).toBe(((3 - 1) + (4 - 3)) / 2);
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async.done();
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});
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}));
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it('should throw if no start event',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate(
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[eventFactory.instant('frame', 4), eventFactory.markEnd('frameCapture', 5)],
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{captureFrames: true})
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.catch((err): any => {
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expect(() => {
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throw err;
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}).toThrowError('missing start event for frame capture');
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async.done();
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});
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}));
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it('should throw if no end event',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate(
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[eventFactory.markStart('frameCapture', 3), eventFactory.instant('frame', 4)],
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{captureFrames: true})
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.catch((err): any => {
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expect(() => { throw err; }).toThrowError('missing end event for frame capture');
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async.done();
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});
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}));
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it('should throw if trying to capture twice',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate(
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[
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eventFactory.markStart('frameCapture', 3),
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eventFactory.markStart('frameCapture', 4)
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],
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{captureFrames: true})
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.catch((err): any => {
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expect(() => {
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throw err;
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}).toThrowError('can capture frames only once per benchmark run');
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async.done();
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});
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}));
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it('should throw if trying to capture when frame capture is disabled',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate([eventFactory.markStart('frameCapture', 3)]).catch((err) => {
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expect(() => { throw err; })
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.toThrowError(
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'found start event for frame capture, but frame capture was not requested in benchpress');
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async.done();
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return null;
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});
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}));
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it('should throw if frame capture is enabled, but nothing is captured',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate([], {captureFrames: true}).catch((err): any => {
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expect(() => { throw err; })
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.toThrowError(
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'frame capture requested in benchpress, but no start event was found');
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async.done();
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});
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}));
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it('should calculate best and worst frame time',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate(
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[
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eventFactory.markStart('frameCapture', 0), eventFactory.instant('frame', 1),
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eventFactory.instant('frame', 9), eventFactory.instant('frame', 15),
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eventFactory.instant('frame', 18), eventFactory.instant('frame', 28),
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eventFactory.instant('frame', 32), eventFactory.markEnd('frameCapture', 10)
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],
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{captureFrames: true})
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.then((data) => {
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expect(data['frameTime.worst']).toBe(10);
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expect(data['frameTime.best']).toBe(3);
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async.done();
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});
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}));
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it('should calculate percentage of smoothness to be good',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate(
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[
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eventFactory.markStart('frameCapture', 0), eventFactory.instant('frame', 1),
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eventFactory.instant('frame', 2), eventFactory.instant('frame', 3),
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eventFactory.markEnd('frameCapture', 4)
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],
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{captureFrames: true})
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.then((data) => {
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expect(data['frameTime.smooth']).toBe(1.0);
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async.done();
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});
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}));
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it('should calculate percentage of smoothness to be bad',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate(
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[
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eventFactory.markStart('frameCapture', 0), eventFactory.instant('frame', 1),
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eventFactory.instant('frame', 2), eventFactory.instant('frame', 22),
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eventFactory.instant('frame', 23), eventFactory.instant('frame', 24),
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eventFactory.markEnd('frameCapture', 4)
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],
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{captureFrames: true})
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.then((data) => {
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expect(data['frameTime.smooth']).toBe(0.75);
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async.done();
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});
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}));
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});
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it('should report a single interval',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate([
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eventFactory.start('script', 0), eventFactory.end('script', 5)
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]).then((data) => {
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expect(data['scriptTime']).toBe(5);
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async.done();
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});
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}));
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it('should sum up multiple intervals',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate([
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eventFactory.start('script', 0), eventFactory.end('script', 5),
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eventFactory.start('script', 10), eventFactory.end('script', 17)
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]).then((data) => {
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expect(data['scriptTime']).toBe(12);
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async.done();
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});
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}));
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it('should ignore not started intervals',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate([eventFactory.end('script', 10)]).then((data) => {
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expect(data['scriptTime']).toBe(0);
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async.done();
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});
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}));
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it('should ignore not ended intervals',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate([eventFactory.start('script', 10)]).then((data) => {
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expect(data['scriptTime']).toBe(0);
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async.done();
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});
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}));
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it('should ignore nested intervals',
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inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
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aggregate([
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eventFactory.start('script', 0), eventFactory.start('script', 5),
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eventFactory.end('script', 10), eventFactory.end('script', 17)
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]).then((data) => {
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expect(data['scriptTime']).toBe(17);
|
|
async.done();
|
|
});
|
|
}));
|
|
|
|
it('should ignore events from different processed as the start mark',
|
|
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
|
|
const otherProcessEventFactory = new TraceEventFactory('timeline', 'pid1');
|
|
const metric = createMetric(
|
|
[[
|
|
eventFactory.markStart('benchpress0', 0), eventFactory.start('script', 0, null),
|
|
eventFactory.end('script', 5, null),
|
|
otherProcessEventFactory.start('script', 10, null),
|
|
otherProcessEventFactory.end('script', 17, null),
|
|
eventFactory.markEnd('benchpress0', 20)
|
|
]],
|
|
null);
|
|
metric.beginMeasure().then((_) => metric.endMeasure(false)).then((data) => {
|
|
expect(data['scriptTime']).toBe(5);
|
|
async.done();
|
|
});
|
|
}));
|
|
|
|
it('should support scriptTime metric',
|
|
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
|
|
aggregate([
|
|
eventFactory.start('script', 0), eventFactory.end('script', 5)
|
|
]).then((data) => {
|
|
expect(data['scriptTime']).toBe(5);
|
|
async.done();
|
|
});
|
|
}));
|
|
|
|
it('should support renderTime metric',
|
|
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
|
|
aggregate([
|
|
eventFactory.start('render', 0), eventFactory.end('render', 5)
|
|
]).then((data) => {
|
|
expect(data['renderTime']).toBe(5);
|
|
async.done();
|
|
});
|
|
}));
|
|
|
|
it('should support gcTime/gcAmount metric',
|
|
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
|
|
aggregate([
|
|
eventFactory.start('gc', 0, {'usedHeapSize': 2500}),
|
|
eventFactory.end('gc', 5, {'usedHeapSize': 1000})
|
|
]).then((data) => {
|
|
expect(data['gcTime']).toBe(5);
|
|
expect(data['gcAmount']).toBe(1.5);
|
|
expect(data['majorGcTime']).toBe(0);
|
|
async.done();
|
|
});
|
|
}));
|
|
|
|
it('should support majorGcTime metric',
|
|
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
|
|
aggregate([
|
|
eventFactory.start('gc', 0, {'usedHeapSize': 2500}),
|
|
eventFactory.end('gc', 5, {'usedHeapSize': 1000, 'majorGc': true})
|
|
]).then((data) => {
|
|
expect(data['gcTime']).toBe(5);
|
|
expect(data['majorGcTime']).toBe(5);
|
|
async.done();
|
|
});
|
|
}));
|
|
|
|
it('should support pureScriptTime = scriptTime-gcTime-renderTime',
|
|
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
|
|
aggregate([
|
|
eventFactory.start('script', 0), eventFactory.start('gc', 1, {'usedHeapSize': 1000}),
|
|
eventFactory.end('gc', 4, {'usedHeapSize': 0}), eventFactory.start('render', 4),
|
|
eventFactory.end('render', 5), eventFactory.end('script', 6)
|
|
]).then((data) => {
|
|
expect(data['scriptTime']).toBe(6);
|
|
expect(data['pureScriptTime']).toBe(2);
|
|
async.done();
|
|
});
|
|
}));
|
|
|
|
describe('receivedData', () => {
|
|
it('should report received data since last navigationStart',
|
|
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
|
|
aggregate(
|
|
[
|
|
eventFactory.instant('receivedData', 0, {'encodedDataLength': 1}),
|
|
eventFactory.instant('navigationStart', 1),
|
|
eventFactory.instant('receivedData', 2, {'encodedDataLength': 2}),
|
|
eventFactory.instant('navigationStart', 3),
|
|
eventFactory.instant('receivedData', 4, {'encodedDataLength': 4}),
|
|
eventFactory.instant('receivedData', 5, {'encodedDataLength': 8})
|
|
],
|
|
{receivedData: true})
|
|
.then((data) => {
|
|
expect(data['receivedData']).toBe(12);
|
|
async.done();
|
|
});
|
|
}));
|
|
});
|
|
|
|
describe('requestCount', () => {
|
|
it('should report count of requests sent since last navigationStart',
|
|
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
|
|
aggregate(
|
|
[
|
|
eventFactory.instant('sendRequest', 0),
|
|
eventFactory.instant('navigationStart', 1),
|
|
eventFactory.instant('sendRequest', 2),
|
|
eventFactory.instant('navigationStart', 3),
|
|
eventFactory.instant('sendRequest', 4), eventFactory.instant('sendRequest', 5)
|
|
],
|
|
{requestCount: true})
|
|
.then((data) => {
|
|
expect(data['requestCount']).toBe(2);
|
|
async.done();
|
|
});
|
|
}));
|
|
});
|
|
|
|
describe('microMetrics', () => {
|
|
|
|
it('should report micro metrics',
|
|
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
|
|
aggregate(
|
|
[
|
|
eventFactory.markStart('mm1', 0),
|
|
eventFactory.markEnd('mm1', 5),
|
|
],
|
|
{microMetrics: {'mm1': 'micro metric 1'}})
|
|
.then((data) => {
|
|
expect(data['mm1']).toBe(5.0);
|
|
async.done();
|
|
});
|
|
}));
|
|
|
|
it('should ignore micro metrics that were not specified',
|
|
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
|
|
aggregate([
|
|
eventFactory.markStart('mm1', 0),
|
|
eventFactory.markEnd('mm1', 5),
|
|
]).then((data) => {
|
|
expect(data['mm1']).toBeFalsy();
|
|
async.done();
|
|
});
|
|
}));
|
|
|
|
it('should report micro metric averages',
|
|
inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
|
|
aggregate(
|
|
[
|
|
eventFactory.markStart('mm1*20', 0),
|
|
eventFactory.markEnd('mm1*20', 5),
|
|
],
|
|
{microMetrics: {'mm1': 'micro metric 1'}})
|
|
.then((data) => {
|
|
expect(data['mm1']).toBe(5 / 20);
|
|
async.done();
|
|
});
|
|
}));
|
|
|
|
});
|
|
|
|
});
|
|
|
|
});
|
|
}
|
|
|
|
class MockDriverExtension extends WebDriverExtension {
|
|
constructor(
|
|
private _perfLogs: any[], private _commandLog: any[],
|
|
private _perfLogFeatures: PerfLogFeatures) {
|
|
super();
|
|
}
|
|
|
|
timeBegin(name: string): Promise<any> {
|
|
this._commandLog.push(['timeBegin', name]);
|
|
return Promise.resolve(null);
|
|
}
|
|
|
|
timeEnd(name: string, restartName: string): Promise<any> {
|
|
this._commandLog.push(['timeEnd', name, restartName]);
|
|
return Promise.resolve(null);
|
|
}
|
|
|
|
perfLogFeatures(): PerfLogFeatures { return this._perfLogFeatures; }
|
|
|
|
readPerfLog(): Promise<any> {
|
|
this._commandLog.push('readPerfLog');
|
|
if (this._perfLogs.length > 0) {
|
|
const next = this._perfLogs[0];
|
|
this._perfLogs.shift();
|
|
return Promise.resolve(next);
|
|
} else {
|
|
return Promise.resolve([]);
|
|
}
|
|
}
|
|
|
|
gc(): Promise<any> {
|
|
this._commandLog.push(['gc']);
|
|
return Promise.resolve(null);
|
|
}
|
|
}
|