mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-12-23 09:52:26 +01:00
173 lines
5.6 KiB
JavaScript
173 lines
5.6 KiB
JavaScript
#!/usr/bin/env node
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const path = require('path')
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const { promises: fs, constants: fsConstants } = require('fs')
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const ttest = require('ttest')
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const { By, Key } = require('selenium-webdriver')
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const { withFixtures } = require('./helpers')
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const { PAGES } = require('./webdriver/driver')
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const DEFAULT_NUM_SAMPLES = 20
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const ALL_PAGES = Object.values(PAGES)
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async function measurePage (pageName) {
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let metrics
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await withFixtures({ fixtures: 'imported-account' }, async ({ driver }) => {
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const passwordField = await driver.findElement(By.css('#password'))
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await passwordField.sendKeys('correct horse battery staple')
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await passwordField.sendKeys(Key.ENTER)
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await driver.findElement(By.css('.selected-account__name'))
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await driver.navigate(pageName)
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await driver.delay(1000)
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metrics = await driver.collectMetrics()
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})
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return metrics
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}
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function calculateResult (calc) {
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return (result) => {
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const calculatedResult = {}
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for (const key of Object.keys(result)) {
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calculatedResult[key] = calc(result[key])
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}
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return calculatedResult
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}
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}
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const calculateSum = (array) => array.reduce((sum, val) => sum + val)
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const calculateAverage = (array) => calculateSum(array) / array.length
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const minResult = calculateResult((array) => Math.min(...array))
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const maxResult = calculateResult((array) => Math.max(...array))
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const averageResult = calculateResult((array) => calculateAverage(array))
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const standardDeviationResult = calculateResult((array) => {
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const average = calculateAverage(array)
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const squareDiffs = array.map((value) => Math.pow(value - average, 2))
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return Math.sqrt(calculateAverage(squareDiffs))
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})
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// 95% margin of error calculated using Student's t-distribution
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const calculateMarginOfError = (array) => ttest(array).confidence()[1] - calculateAverage(array)
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const marginOfErrorResult = calculateResult((array) => calculateMarginOfError(array))
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async function profilePageLoad (pages, numSamples) {
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const results = {}
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for (const pageName of pages) {
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const runResults = []
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for (let i = 0; i < numSamples; i += 1) {
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runResults.push(await measurePage(pageName))
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}
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if (runResults.some((result) => result.navigation.lenth > 1)) {
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throw new Error(`Multiple navigations not supported`)
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} else if (runResults.some((result) => result.navigation[0].type !== 'navigate')) {
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throw new Error(`Navigation type ${runResults.find((result) => result.navigation[0].type !== 'navigate').navigation[0].type} not supported`)
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}
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const result = {
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firstPaint: runResults.map((result) => result.paint['first-paint']),
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domContentLoaded: runResults.map((result) => result.navigation[0] && result.navigation[0].domContentLoaded),
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load: runResults.map((result) => result.navigation[0] && result.navigation[0].load),
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domInteractive: runResults.map((result) => result.navigation[0] && result.navigation[0].domInteractive),
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}
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results[pageName] = {
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min: minResult(result),
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max: maxResult(result),
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average: averageResult(result),
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standardDeviation: standardDeviationResult(result),
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marginOfError: marginOfErrorResult(result),
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}
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}
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return results
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}
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async function isWritable (directory) {
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try {
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await fs.access(directory, fsConstants.W_OK)
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return true
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} catch (error) {
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if (error.code !== 'EACCES') {
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throw error
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}
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return false
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}
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}
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async function getFirstParentDirectoryThatExists (directory) {
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while (true) {
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try {
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await fs.access(directory, fsConstants.F_OK)
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return directory
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} catch (error) {
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if (error.code !== 'ENOENT') {
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throw error
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} else if (directory === path.dirname(directory)) {
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throw new Error('Failed to find parent directory that exists')
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}
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directory = path.dirname(directory)
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}
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}
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}
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async function main () {
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const args = process.argv.slice(2)
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let pages = ['home']
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let numSamples = DEFAULT_NUM_SAMPLES
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let outputPath
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let outputDirectory
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let existingParentDirectory
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while (args.length) {
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if (/^(--pages|-p)$/i.test(args[0])) {
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if (args[1] === undefined) {
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throw new Error('Missing pages argument')
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}
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pages = args[1].split(',')
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for (const page of pages) {
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if (!ALL_PAGES.includes(page)) {
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throw new Error(`Invalid page: '${page}`)
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}
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}
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args.splice(0, 2)
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} else if (/^(--samples|-s)$/i.test(args[0])) {
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if (args[1] === undefined) {
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throw new Error('Missing number of samples')
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}
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numSamples = parseInt(args[1], 10)
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if (isNaN(numSamples)) {
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throw new Error(`Invalid 'samples' argument given: '${args[1]}'`)
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}
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args.splice(0, 2)
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} else if (/^(--out|-o)$/i.test(args[0])) {
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if (args[1] === undefined) {
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throw new Error('Missing output filename')
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}
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outputPath = path.resolve(args[1])
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outputDirectory = path.dirname(outputPath)
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existingParentDirectory = await getFirstParentDirectoryThatExists(outputDirectory)
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if (!await isWritable(existingParentDirectory)) {
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throw new Error(`Specified directory is not writable: '${args[1]}'`)
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}
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args.splice(0, 2)
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} else {
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throw new Error(`Unrecognized argument: '${args[0]}'`)
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}
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}
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const results = await profilePageLoad(pages, numSamples)
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if (outputPath) {
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if (outputDirectory !== existingParentDirectory) {
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await fs.mkdir(outputDirectory, { recursive: true })
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}
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await fs.writeFile(outputPath, JSON.stringify(results, null, 2))
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} else {
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console.log(JSON.stringify(results, null, 2))
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}
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}
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main()
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.catch((e) => {
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console.error(e)
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process.exit(1)
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})
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