KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use tracedMetrics method in Best

Best JavaScript code snippet using best

trace.spec.ts

Source:trace.spec.ts

1/*2 * Copyright (c) 2019, salesforce.com, inc.3 * All rights reserved.4 * SPDX-License-Identifier: MIT5 * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT6*/7import os from 'os';8import fs from 'fs';9import path from 'path';10import { parseTrace, removeTrace, mergeTracedMetrics } from '../trace';11import { BenchmarkResults } from '@best/types';12const TEMP_DIR_PREFIX = 'best-test-';13function tempDir() {14    return fs.mkdtempSync(path.join(os.tmpdir(), TEMP_DIR_PREFIX));15}16describe('removeTrace', () => {17    test('does not throw when file does not exist', async () => {18        const tracePath = path.resolve(tempDir(), 'trace.json');19        await removeTrace(tracePath)20    })21    test('deletes file when it is present', async () => {22        const tracePath = path.resolve(tempDir(), 'trace.json');23        const data = JSON.stringify({test: true});24        fs.writeFileSync(tracePath, data);25        await removeTrace(tracePath)26        const existsAfter = fs.existsSync(tracePath);27        expect(existsAfter).toBeFalsy();28    })29})30describe('mergeTracedMetrics', () => {31    test('does not alter benchmarkResults when trace metrics are empty', async () => {32        const traceMetrics = {};33        const benchmarkResults: BenchmarkResults = {34            benchmarkName: 'test',35            executedIterations: 0,36            aggregate: 0,37            results: [{ type: "benchmark", metrics: { script: 30 }, name: "foo", startedAt: 0, aggregate: 0 }]38        }39        const original = benchmarkResults;40        await mergeTracedMetrics(benchmarkResults, traceMetrics);41        expect(original).toEqual(benchmarkResults);42    })43    test('merges trace metrics at root level', async () => {44        const traceMetrics = { foo: { paint: 5 } }45        const benchmarkResults: BenchmarkResults = {46            benchmarkName: 'test',47            executedIterations: 0,48            aggregate: 0,49            results: [{ type: "benchmark", metrics: { script: 30 }, name: "foo", startedAt: 0, aggregate: 0 }]50        }51        const expectedResults: BenchmarkResults = {52            benchmarkName: 'test',53            executedIterations: 0,54            aggregate: 0,55            results: [{ type: "benchmark", metrics: { script: 30, paint: 5 }, name: "foo", startedAt: 0, aggregate: 0 }]56        }57        await mergeTracedMetrics(benchmarkResults, traceMetrics);58        expect(expectedResults).toEqual(benchmarkResults);59    })60    test('merges trace metrics at when embedded in group', async () => {61        const traceMetrics = {62            foo: { paint: 5 },63            bar: { paint: 20, layout: 100 }64        }65        const benchmarkResults: BenchmarkResults = {66            benchmarkName: 'test',67            executedIterations: 0,68            aggregate: 0,69            results: [{70                type: "group",71                name: "A",72                aggregate: 0,73                startedAt: 0,74                nodes: [75                    { type: "benchmark", metrics: { script: 30 }, name: "foo", startedAt: 0, aggregate: 0 },76                    { type: "benchmark", metrics: { script: 10 }, name: "bar", startedAt: 0, aggregate: 0 }77                ]78            }]79        }80        const expectedResults: BenchmarkResults = {81            benchmarkName: 'test',82            executedIterations: 0,83            aggregate: 0,84            results: [{85                type: "group",86                name: "A",87                aggregate: 0,88                startedAt: 0,89                nodes: [90                    { type: "benchmark", metrics: { script: 30, paint: 5 }, name: "foo", startedAt: 0, aggregate: 0 },91                    { type: "benchmark", metrics: { script: 10, paint: 20, layout: 100 }, name: "bar", startedAt: 0, aggregate: 0 }92                ]93            }]94        }95        await mergeTracedMetrics(benchmarkResults, traceMetrics);96        expect(benchmarkResults).toEqual(expectedResults);97    })98})99describe('parseTrace', () => {100    test('throws error when given path does not exist', async () => {101        expect(parseTrace('fake-path.json')).rejects.toThrow(/no such file/)102    })103    test('parses trace-simple.json to find paints and layouts', async () => {104        const tracePath = path.resolve(__dirname, 'fixtures', 'trace-simple.json');105        const tracedMetrics = await parseTrace(tracePath);106        const expectedResults = {107            foo: { paint: 50, layout: 20 }108        }109        expect(tracedMetrics).toEqual(expectedResults);110    })111    test('parses trace-complex.json to find paints and layouts', async () => {112        const tracePath = path.resolve(__dirname, 'fixtures', 'trace-complex.json');113        const tracedMetrics = await parseTrace(tracePath);114        const expectedResults = {115            foo: { paint: 50, layout: 20 },116            bar: { paint: 50, layout: 10.5 }117        }118        expect(tracedMetrics).toEqual(expectedResults);119    })...

trace.ts

Source:trace.ts

1/*2 * Copyright (c) 2019, salesforce.com, inc.3 * All rights reserved.4 * SPDX-License-Identifier: MIT5 * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT6*/7import fs from 'fs';8import { promisify } from 'util';9import { BenchmarkResults, BenchmarkMetrics, BenchmarkResultNode, BenchmarkMeasureType } from '@best/types';10const asyncReadFile = promisify(fs.readFile);11const asyncUnlink = promisify(fs.unlink);12const asyncExists = promisify(fs.exists);13const TRACED_METRIC_EVENTS = ['Paint', 'Layout', 'UpdateLayoutTree', 'UpdateLayerTree', 'CompositeLayers'];14const TRACED_EVENT_NAME_ALIAS: any = { 'UpdateLayoutTree': 'RecalculateStyles' };15interface TracedMetrics {16    [key: string]: BenchmarkMetrics17}18const isBeginPhase = (event: { ph: string }): boolean => {19    return event.ph.toLowerCase() === 'b';20}21const isEndPhase = (event: { ph: string }): boolean => {22    return event.ph.toLowerCase() === 'e';23}24const hasDurationPhased = (event: { ph: string }): boolean => {25    return isBeginPhase(event) || isEndPhase(event);26}27const sumPairedMetrics = (events: any[]): number => {28    let duration = 0;29    for (const event of events) {30        if (isBeginPhase(event)) {31            duration -= event.ts;32        } else if (isEndPhase(event)) {33            duration += event.ts;34        }35    }36    return duration;37}38// returns the total duration of all paints or layouts, etc in microseconds39const sumEventDurations = (events: any[]): number => {40    const pairedMetrics = events.filter(hasDurationPhased);41    if (pairedMetrics.length > 0 && pairedMetrics.length % 2 === 0) {42        return sumPairedMetrics(events);43    }44    return events.reduce((previous, current) => previous += current.dur, 0);45}46export const parseTrace = async (tracePath: string): Promise<TracedMetrics> => {47    const file = await asyncReadFile(tracePath, 'utf8');48    const trace = JSON.parse(file);49    const tracedMetricEvents = trace.traceEvents.filter((event: any) => TRACED_METRIC_EVENTS.includes(event.name) || event.name.includes((`${BenchmarkMeasureType.Execute}/`)));50    const sortedEvents = tracedMetricEvents.sort((a: any, b: any) => a.ts - b.ts);51    const groupedEvents: { [run: string]: { [event: string]: any[] } } = {};52    let currentRun: string | false = false;53    for (const event of sortedEvents) {54        if (currentRun && TRACED_METRIC_EVENTS.includes(event.name)) {55            if (groupedEvents[currentRun][event.name]) {56                groupedEvents[currentRun][event.name].push(event);57            } else {58                groupedEvents[currentRun][event.name] = [event];59            }60        } else if (event.name.includes(`${BenchmarkMeasureType.Execute}/`)) {61            if (isBeginPhase(event)) {62                currentRun = event.name;63                groupedEvents[event.name] = {};64            } else if (isEndPhase(event)) {65                currentRun = false;66            }67        }68    }69    const tracedMetrics = Object.keys(groupedEvents).reduce((allMetrics, key): TracedMetrics => {70        const runName = key.replace((`${BenchmarkMeasureType.Execute}/`), '');71        const metrics = Object.keys(groupedEvents[key]).reduce((acc, eventName): BenchmarkMetrics => {72            const aliasEventName = TRACED_EVENT_NAME_ALIAS[eventName] || eventName;73            const name = aliasEventName.toLowerCase();74            return {75                ...acc,76                [name]: (sumEventDurations(groupedEvents[key][eventName]) / 1000)77            }78        }, <BenchmarkMetrics>{})79        return {80            ...allMetrics,81            [runName]: metrics82        };83    }, <TracedMetrics>{})84    return tracedMetrics;85}86const mergeTracedMetricsIntoResultNode = (resultNode: BenchmarkResultNode, parsedTrace: TracedMetrics) => {87    if (resultNode.type === "group") {88        resultNode.nodes.forEach(node => {89            mergeTracedMetricsIntoResultNode(node, parsedTrace);90        })91    } else if (resultNode.type === "benchmark") {92        const nodeTraces = parsedTrace[resultNode.name];93        resultNode.metrics = {94            ...resultNode.metrics,95            ...nodeTraces96        }97    }98}99export const mergeTracedMetrics = (benchmarkResults: BenchmarkResults, parsedTrace: TracedMetrics) => {100    benchmarkResults.results.forEach(node => {101        mergeTracedMetricsIntoResultNode(node, parsedTrace);102    })103}104export const removeTrace = async (tracePath: string): Promise<void> => {105    const fileExists = await asyncExists(tracePath);106    if (fileExists) {107        await asyncUnlink(tracePath);108    }...

Using AI Code Generation

1var BestPractices = require('newrelic');2var fs = require('fs');3var now = new Date();4var then = new Date(now.getTime() - 24*60*60*1000);5BestPractices.tracedMetrics(then, now, function(err, data) {6  if (err) {7    console.log(err);8  } else {9    fs.writeFile("tracedMetrics.json", JSON.stringify(data), function(err) {10      if (err) {11        console.log(err);12      } else {13        console.log("The file was saved!");14      }15    });16  }17});

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.