mirror of
https://github.com/scratchfoundation/scratch-www.git
synced 2024-11-27 09:35:56 -05:00
621861ee40
Instead of trying to proactively scroll if necessary, just let Selenium handle scrolling. The only reason to handle scrolling manually was to tell the difference between an off-screen element and one that isn't visible due to being beneath another element (like the loading screen). Catching `ElementClickInterceptedError` is a simpler way to do that.
591 lines
22 KiB
JavaScript
591 lines
22 KiB
JavaScript
jest.setTimeout(30000); // eslint-disable-line no-undef
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const webdriver = require('selenium-webdriver');
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const {PageLoadStrategy} = require('selenium-webdriver/lib/capabilities');
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const bindAll = require('lodash.bindall');
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require('chromedriver');
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const chromedriverVersion = require('chromedriver').version;
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const headless = process.env.SMOKE_HEADLESS || false;
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const remote = process.env.SMOKE_REMOTE || false;
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const ci = process.env.CI || false;
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const usingCircle = process.env.CIRCLECI || false;
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const buildID = process.env.CIRCLE_BUILD_NUM || '0000';
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const {SAUCE_USERNAME, SAUCE_ACCESS_KEY} = process.env;
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const {By, Key, until} = webdriver;
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// The main reason for this timeout is so that we can control the timeout message and report details;
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// if we hit the Jasmine default timeout then we get a terse message that we can't control.
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// The Jasmine default timeout is 30 seconds so make sure this is lower.
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const DEFAULT_TIMEOUT_MILLISECONDS = 20 * 1000;
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// This removes confusing `regenerator-runtime` noise from stack traces.
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// This is V8-specific code. Please don't use it in a browser or any production code.
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const oldPrepareStackTrace = Error.prepareStackTrace;
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Error.prepareStackTrace = function (error, stack) {
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stack = stack.filter(callsite => {
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const filename = callsite.getFileName();
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return filename && !filename.includes('regenerator-runtime');
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});
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if (oldPrepareStackTrace) {
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return oldPrepareStackTrace(error, stack);
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}
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return [
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`${error.constructor.name}: ${error.message}`,
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...stack.map(callsite => ` at ${callsite.toString()}`)
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].join('\n');
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};
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/**
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* An error thrown by SeleniumHelper.
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* @extends Error
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*/
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class SeleniumHelperError extends Error {
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/**
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* Instantiate a new SeleniumHelperError.
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* @param {string} message The error message for this layer.
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* @param {Array} [kvList] Optional keys & values to add to the error message, for example to capture arguments.
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* @example
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* const e = new SeleniumHelperError('something failed', [{xpath}, {somethingElse}])
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* try {
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* doThings();
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* } catch (inner) {
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* throw await e.chain(inner, driver);
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* }
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*/
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constructor (message, kvList = []) {
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const baseMessage = [
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message,
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...kvList.map(kv => ` ${Object.keys(kv)[0]}: ${Object.values(kv)[0]}`)
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].join('\n');
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super(baseMessage);
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Object.setPrototypeOf(this, SeleniumHelperError.prototype); // see https://stackoverflow.com/a/41102306
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this.name = 'SeleniumHelperError';
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Error.captureStackTrace(this, this.constructor);
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}
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/**
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* Add a new layer to the error chain.
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* Collects context from the webdriver if it is present AND this is the innermost `SeleniumHelperError`.
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* @param {Error|SeleniumHelperError} innerError The error to add to the chain.
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* @param {webdriver.ThenableWebDriver} [driver] Optional webdriver instance to collect context from.
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* @returns {Promise<SeleniumHelperError>} This error, with the new layer added.
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*/
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async chain (innerError, driver) {
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const messageLines = [
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this.message,
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innerError.message
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];
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// If the inner error has already collected context, don't collect it again.
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if (driver && !(innerError && innerError.collectContext)) {
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await this.collectContext(messageLines, driver);
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}
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this.message = messageLines.join('\n');
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return this;
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}
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/**
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* Collect error context from the webdriver.
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* @param {Array<string>} messageLines Add context lines to this array.
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* @param {webdriver.ThenableWebDriver} driver The webdriver instance to collect context from.
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* @returns {Promise} A promise that resolves when the context is collected.
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*/
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async collectContext (messageLines, driver) {
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// It would be really nice to wait until `message` time to collect all this information,
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// but that's not an option because of all these async calls.
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const [
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url,
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title,
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// pageSource,
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logEntries
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] = await Promise.all([
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driver.getCurrentUrl(),
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driver.getTitle(),
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// driver.getPageSource(),
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driver.manage()
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.logs()
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.get('browser')
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]);
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messageLines.push(
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`Browser URL: ${url}`,
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`Browser title: ${title}`,
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'Browser logs:',
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'*****',
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...logEntries.map(entry => entry.message),
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'*****'
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// 'Browser page source:', '*****', pageSource, '*****'
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);
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}
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}
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class SeleniumHelper {
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constructor () {
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bindAll(this, [
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'buildDriver',
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'clickButton',
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'clickCss',
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'clickText',
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'clickXpath',
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'containsClass',
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'dragFromXpathToXpath',
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'findByCss',
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'findByXpath',
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'findText',
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'getKey',
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'getDriver',
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'getLogs',
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'getSauceDriver',
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'isSignedIn',
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'navigate',
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'signIn',
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'urlMatches',
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'waitUntilDocumentReady',
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'waitUntilGone'
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]);
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// Tests call this static function as if it were a method on an instance.
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this.waitUntilVisible = SeleniumHelper.waitUntilVisible;
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// this type declaration suppresses IDE type warnings throughout this file
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/** @type {webdriver.ThenableWebDriver} */
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this.driver = null;
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}
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/**
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* Build a new webdriver instance. This will use Sauce Labs if the SMOKE_REMOTE environment variable is 'true', or
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* `chromedriver` otherwise.
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* @param {string} name The name to give to Sauce Labs.
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* @returns {webdriver.ThenableWebDriver} The new webdriver instance.
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*/
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buildDriver (name) {
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if (remote === 'true'){
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let nameToUse;
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if (ci === 'true'){
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const ciName = usingCircle ? 'circleCi ' : 'unknown ';
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nameToUse = `${ciName + buildID} : ${name}`;
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} else {
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nameToUse = name;
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}
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this.driver = this.getSauceDriver(SAUCE_USERNAME, SAUCE_ACCESS_KEY, nameToUse);
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} else {
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this.driver = this.getDriver();
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}
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return this.driver;
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}
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/**
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* Build a new webdriver instance using `chromedriver`.
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* You should probably use `buildDriver` instead.
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* @returns {webdriver.ThenableWebDriver} The new webdriver instance.
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*/
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getDriver () {
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const chromeCapabilities = webdriver.Capabilities.chrome();
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const args = [];
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if (headless) {
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args.push('--headless');
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args.push('window-size=1024,1680');
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args.push('--no-sandbox');
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}
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chromeCapabilities.set('chromeOptions', {args});
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chromeCapabilities.setPageLoadStrategy(PageLoadStrategy.EAGER);
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const driver = new webdriver.Builder()
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.forBrowser('chrome')
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.withCapabilities(chromeCapabilities)
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.build();
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return driver;
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}
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/**
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* @returns {string} The version of chromedriver being used.
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*/
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getChromeVersionNumber () {
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const versionFinder = /\d+\.\d+/;
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const versionArray = versionFinder.exec(chromedriverVersion);
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if (versionArray === null) {
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throw new Error('couldn\'t find version of chromedriver');
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}
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return versionArray[0];
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}
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/**
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* Build a new webdriver instance using Sauce Labs.
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* You should probably use `buildDriver` instead.
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* @param {string} username The Sauce Labs username.
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* @param {string} accessKey The Sauce Labs access key.
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* @param {string} name The name to give to Sauce Labs.
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* @returns {webdriver.ThenableWebDriver} The new webdriver instance.
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*/
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getSauceDriver (username, accessKey, name) {
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const chromeVersion = this.getChromeVersionNumber();
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// Driver configs can be generated with the Sauce Platform Configurator
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// https://wiki.saucelabs.com/display/DOCS/Platform+Configurator
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const driverConfig = {
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browserName: 'chrome',
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platform: 'macOS 10.15',
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version: chromeVersion
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};
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const driver = new webdriver.Builder()
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.withCapabilities({
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browserName: driverConfig.browserName,
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platform: driverConfig.platform,
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version: driverConfig.version,
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username: username,
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accessKey: accessKey,
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name: name
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})
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.usingServer(`http://${username}:${accessKey}@ondemand.saucelabs.com:80/wd/hub`)
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.build();
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return driver;
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}
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/**
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* Retrieves a key string by name.
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* @example
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* getKey('ENTER') // => '\uE007'
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* @param {string} keyName The name of the key to retrieve.
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* @returns {string} The key.
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*/
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getKey (keyName) {
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return Key[keyName];
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}
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/**
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* Wait until the document is ready (i.e. the document.readyState is 'complete')
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* @returns {Promise} A promise that resolves when the document is ready
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*/
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async waitUntilDocumentReady () {
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const outerError = new SeleniumHelperError('waitUntilDocumentReady failed');
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try {
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await this.driver.wait(
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async () => await this.driver.executeScript('return document.readyState;') === 'complete',
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DEFAULT_TIMEOUT_MILLISECONDS
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);
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* Navigate to the given URL and wait until the document is ready
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* @param {string} url The URL to navigate to.
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* @returns {Promise} A promise that resolves when the document is ready
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*/
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async navigate (url) {
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const outerError = new SeleniumHelperError('navigate failed', [{url}]);
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try {
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await this.driver.get(url);
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await this.waitUntilDocumentReady();
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* Find an element by xpath.
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* @param {string} xpath The xpath to search for.
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* @returns {Promise<webdriver.WebElement>} A promise that resolves to the element.
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*/
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async findByXpath (xpath) {
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const outerError = new SeleniumHelperError('findByXpath failed', [{xpath}]);
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try {
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const el = await this.driver.wait(until.elementLocated(By.xpath(xpath)), DEFAULT_TIMEOUT_MILLISECONDS);
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await this.driver.wait(el.isDisplayed(), DEFAULT_TIMEOUT_MILLISECONDS);
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return el;
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* @param {webdriver.WebElement} element Wait until this element is gone (stale).
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* @returns {Promise} A promise that resolves when the element is gone.
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*/
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async waitUntilGone (element) {
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const outerError = new SeleniumHelperError('waitUntilGone failed', [{element}]);
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try {
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await this.driver.wait(until.stalenessOf(element), DEFAULT_TIMEOUT_MILLISECONDS);
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* Wait until an element can be found by the provided xpath, then click on it.
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* @param {string} xpath The xpath to click.
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* @returns {Promise} A promise that resolves when the element is clicked.
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*/
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async clickXpath (xpath) {
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const outerError = new SeleniumHelperError('clickXpath failed', [{xpath}]);
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try {
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return await this.driver.wait(new webdriver.WebElementCondition(
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'for element click to succeed',
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async () => {
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const element = await this.findByXpath(xpath);
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if (!element) {
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return null;
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}
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try {
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await element.click();
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return element;
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} catch (e) {
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if (e instanceof webdriver.error.ElementClickInterceptedError) {
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// something is in front of the element we want to click
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// probably the loading screen
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// this is the main reason for using wait()
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return null;
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}
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throw e;
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}
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}
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), DEFAULT_TIMEOUT_MILLISECONDS);
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* Wait until an element can be found by the provided text, then click on it.
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* @param {string} text The text to click.
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* @returns {Promise} A promise that resolves when the element is clicked.
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*/
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async clickText (text) {
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const outerError = new SeleniumHelperError('clickText failed', [{text}]);
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try {
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await this.clickXpath(`//*[contains(text(), '${text}')]`);
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* Wait until an element can be found by the provided text.
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* @param {string} text The text to find.
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* @returns {Promise<webdriver.WebElement>} The element containing the text.
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*/
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async findText (text) {
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const outerError = new SeleniumHelperError('findText failed', [{text}]);
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try {
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return await this.driver.wait(
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until.elementLocated(By.xpath(`//*[contains(text(), '${text}')]`)),
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DEFAULT_TIMEOUT_MILLISECONDS
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);
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* Wait until a button can be found by the provided text, then click on it.
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* @param {string} text The button text to find and click.
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* @returns {Promise} A promise that resolves when the button is clicked.
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*/
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async clickButton (text) {
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const outerError = new SeleniumHelperError('clickButton failed', [{text}]);
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try {
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await this.clickXpath(`//button[contains(text(), '${text}')]`);
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* Wait until an element can be found by the provided CSS selector.
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* @param {string} css The CSS selector to find.
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* @returns {Promise<webdriver.WebElement>} The element matching the CSS selector.
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*/
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async findByCss (css) {
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const outerError = new SeleniumHelperError('findByCss failed', [{css}]);
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try {
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return await this.driver.wait(until.elementLocated(By.css(css)), DEFAULT_TIMEOUT_MILLISECONDS);
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* Wait until an element can be found by the provided CSS selector, then click on it.
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* @param {string} css The CSS selector to find and click.
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* @returns {Promise} A promise that resolves when the element is clicked.
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*/
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async clickCss (css) {
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const outerError = new SeleniumHelperError('clickCss failed', [{css}]);
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try {
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const el = await this.findByCss(css);
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await el.click();
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* Wait until the two elements can be found, then drag from the first to the second.
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* @param {string} startXpath The xpath to drag from.
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* @param {string} endXpath The xpath to drag to.
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* @returns {Promise} A promise that resolves when the drag is complete.
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*/
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async dragFromXpathToXpath (startXpath, endXpath) {
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const outerError = new SeleniumHelperError('dragFromXpathToXpath failed', [{startXpath}, {endXpath}]);
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try {
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const startEl = await this.findByXpath(startXpath);
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const endEl = await this.findByXpath(endXpath);
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await this.driver.actions()
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.dragAndDrop(startEl, endEl)
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.perform();
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* @returns {string} The xpath to the login button, which is present only if signed out.
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*/
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getPathForLogin () {
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return '//li[@class="link right login-item"]/a';
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}
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/**
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* @returns {string} The xpath to the profile name, which is present only if signed in.
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*/
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getPathForProfileName () {
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return '//span[contains(@class, "profile-name")]';
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}
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/**
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* @returns {Promise<boolean>} True if the user is signed in, false otherwise.
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* @throws {SeleniumHelperError} If the user's sign-in state cannot be determined.
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*/
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async isSignedIn () {
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const outerError = new SeleniumHelperError('isSignedIn failed');
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try {
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const state = await this.driver.wait(
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() => this.driver.executeScript(
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`
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if (document.evaluate(arguments[0], document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null)
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.singleNodeValue) {
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return 'signed in';
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}
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if (document.evaluate(arguments[1], document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null)
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.singleNodeValue) {
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return 'signed out';
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}
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`,
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this.getPathForProfileName(),
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this.getPathForLogin()
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),
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DEFAULT_TIMEOUT_MILLISECONDS
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);
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switch (state) {
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case 'signed in':
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return true;
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case 'signed out':
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return false;
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default:
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throw new Error('Could not determine whether or not user is signed in');
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}
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} catch (cause) {
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throw await outerError.chain(cause, this.driver);
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}
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}
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/**
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* Sign in on a `scratch-www` page.
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* @param {string} username The username to sign in with.
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* @param {string} password The password to sign in with.
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* @returns {Promise} A promise that resolves when the user is signed in.
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*/
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async signIn (username, password) {
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const outerError = new SeleniumHelperError('signIn failed', [
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{username},
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{password: password ? 'provided' : 'absent'}
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]);
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try {
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await this.clickXpath(this.getPathForLogin());
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const name = await this.findByXpath('//input[@id="frc-username-1088"]');
|
|
await name.sendKeys(username);
|
|
const word = await this.findByXpath('//input[@id="frc-password-1088"]');
|
|
await word.sendKeys(password + this.getKey('ENTER'));
|
|
await this.findByXpath(this.getPathForProfileName());
|
|
} catch (cause) {
|
|
throw await outerError.chain(cause, this.driver);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Wait until the URL matches the provided regex.
|
|
* @param {RegExp} regex The regex to match the url against.
|
|
* @returns {Promise} A promise that resolves when the url matches the regex.
|
|
*/
|
|
async urlMatches (regex) {
|
|
const outerError = new SeleniumHelperError('urlMatches failed', [{regex}]);
|
|
try {
|
|
await this.driver.wait(until.urlMatches(regex), DEFAULT_TIMEOUT_MILLISECONDS);
|
|
} catch (cause) {
|
|
throw await outerError.chain(cause, this.driver);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get selected browser log entries.
|
|
* @param {Array<string>} whitelist A list of log strings to allow.
|
|
* @returns {Promise<Array<webdriver.logging.Entry>>} A promise that resolves to the log entries.
|
|
*/
|
|
async getLogs (whitelist) {
|
|
const outerError = new SeleniumHelperError('getLogs failed', [{whitelist}]);
|
|
try {
|
|
const entries = await this.driver.manage()
|
|
.logs()
|
|
.get('browser');
|
|
return entries.filter(entry => {
|
|
const message = entry.message;
|
|
for (const element of whitelist) {
|
|
if (message.indexOf(element) !== -1) {
|
|
// eslint-disable-next-line no-console
|
|
// console.warn('Ignoring whitelisted error: ' + whitelist[i]);
|
|
return false;
|
|
} else if (entry.level !== 'SEVERE') { // WARNING: this doesn't do what it looks like it does!
|
|
// eslint-disable-next-line no-console
|
|
// console.warn('Ignoring non-SEVERE entry: ' + message);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
return true;
|
|
});
|
|
} catch (cause) {
|
|
throw await outerError.chain(cause, this.driver);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check if an element's class attribute contains a given class.
|
|
* @param {webdriver.WebElement} element The element to check.
|
|
* @param {string} cl The class to check for.
|
|
* @returns {Promise<boolean>} True if the element's class attribute contains the given class, false otherwise.
|
|
*/
|
|
async containsClass (element, cl) {
|
|
const outerError = new SeleniumHelperError('containsClass failed', [{element}, {cl}]);
|
|
try {
|
|
const classes = await element.getAttribute('class');
|
|
const classList = classes.split(' ');
|
|
return classList.includes(cl);
|
|
} catch (cause) {
|
|
throw await outerError.chain(cause, this.driver);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {webdriver.WebElement} element Wait until this element is visible.
|
|
* @param {webdriver.ThenableWebDriver} driver The webdriver instance.
|
|
* @returns {Promise} A promise that resolves when the element is visible.
|
|
*/
|
|
static async waitUntilVisible (element, driver) {
|
|
const outerError = new SeleniumHelperError('waitUntilVisible failed', [{element}]);
|
|
try {
|
|
await driver.wait(until.elementIsVisible(element), DEFAULT_TIMEOUT_MILLISECONDS);
|
|
} catch (cause) {
|
|
throw await outerError.chain(cause, driver);
|
|
}
|
|
}
|
|
}
|
|
|
|
module.exports = SeleniumHelper;
|