Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use prevTest method in backstopjs

Best JavaScript code snippet using backstopjs

add-build.js

Source:add-build.js

1// Copyright 2020 Google LLC2//3// Licensed under the Apache License, Version 2.0 (the "License");4// you may not use this file except in compliance with the License.5// You may obtain a copy of the License at6//7//     https://www.apache.org/licenses/LICENSE-2.08//9// Unless required by applicable law or agreed to in writing, software10// distributed under the License is distributed on an "AS IS" BASIS,11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.12// See the License for the specific language governing permissions and13// limitations under the License.14/*15* Code to add a build including test cases16* Updates the analytics for the modified test cases17* and builds18* returns analytics object and adds such data to database19*/20const { Firestore } = require('@google-cloud/firestore');21const { TestCaseAnalytics } = require('../lib/analytics.js');22const { v4: uuidv4 } = require('uuid');23const awaitInBatches = require('../lib/promise-util.js');24const AGGREGATE_SIZE = 25;25const RESET_SUCCESS_COUNT = 10;26const api = { addTestRun, addBuild, calculateFlaky, updateQueue, updateTest, RESET_SUCCESS_COUNT };27/*28* Adds a list of TestCaseRun objects to the database, described by the meta information in buildInfo29*       Does not assume repository has been initializ30*       Particular build MAY NOT be added multiple times with different information, but may be added multiple times with same in31* @param buildInfo must have attributes of organization, timestamp, url, environment, buildId, buildmessage, sha, na32* @param client is the firebase client33* @param collectionName is the collection to use in firestore34*35*/36async function addBuild (testCases, buildInfo, client, collectionName) {37  const dbRepo = client.collection(collectionName).doc(buildInfo.repoId);38  // Create new Buildid this build has already been posted, skip39  buildInfo.buildIdReadable = buildInfo.buildId;40  buildInfo.buildId = uuidv4(); // buildId will always be UUID41  const [computedData] = await Promise.all([updateAllTests(testCases, buildInfo, dbRepo), isMostRecentBuild(buildInfo, dbRepo)]);42  await Promise.all([addBuildDoc(testCases, buildInfo, computedData, dbRepo), updateRepoDoc(buildInfo, dbRepo)]);43}44async function updateAllTests (testCases, buildInfo, dbRepo) {45  // For the test cases46  const metrics = {47    flaky: 0,48    failcount: 0,49    passcount: 0,50    percentpassing: 0,51    buildflaky: 0,52    total: 053  };54  // see if this is the first build for the repository55  const isFirstBuild = await dbRepo.collection('builds').get().then(collectionSnapshot => {56    if (collectionSnapshot.size === 0) {57      return true;58    } else {59      return false;60    }61  });62  const testsToProcess = testCases.map((testCase) => {63    return () => {64      return updateQueue(isFirstBuild, testCase, buildInfo, dbRepo);65    };66  });67  const allTestMetrics = await awaitInBatches(testsToProcess, 50);68  allTestMetrics.forEach(testStatus => {69    const { passed, flaky } = testStatus;70    if (flaky) { metrics.flaky += 1; }71    if (passed) { metrics.passcount += 1; }72    if (!passed) { metrics.failcount += 1; }73    if (!passed && flaky) { metrics.buildflaky += 1; }74    metrics.total += 1;75  });76  metrics.percentpassing = (metrics.total === 0) ? 0 : metrics.passcount / metrics.total;77  return metrics;78}79async function addTestRun (testCase, buildInfo, dbRepo) {80  return dbRepo.collection('queued').doc(testCase.encodedName).collection('runs').doc(buildInfo.buildId).set(81    {82      environment: buildInfo.environment,83      status: testCase.successful ? 'OK' : testCase.failureMessage,84      timestamp: buildInfo.timestamp,85      buildId: buildInfo.buildIdReadable, // as value decoded86      buildIdInternal: buildInfo.buildId,87      sha: decodeURIComponent(buildInfo.sha)88    }89  );90}91async function updateQueue (isFirstBuild, testCase, buildInfo, dbRepo) {92  // see if the test exists in the queue93  const prevTest = await dbRepo.collection('queued').doc(testCase.encodedName).get();94  const cachedSuccess = (prevTest.exists && prevTest.data().cachedSuccess) ? prevTest.data().cachedSuccess : [];95  const cachedFails = (prevTest.exists && prevTest.data() && prevTest.data().cachedFails) ? prevTest.data().cachedFails : [];96  // We should update the queue of tests:97  // 1. if this is the very first build.98  // 2. if there have been less than a threshold of successes in a row.99  // 3. if the testCase is itself a failure.100  if (!testCase.successful || shouldContinueUpdating(prevTest) || isFirstBuild) {101    const testCaseAnalytics = new TestCaseAnalytics(testCase, cachedSuccess, cachedFails, buildInfo, prevTest);102    await api.addTestRun(testCase, buildInfo, dbRepo);103    return api.updateTest(prevTest, testCaseAnalytics, testCase, buildInfo, dbRepo);104  }105  // return metrics106  return {107    flaky: calculateFlaky(prevTest, testCase),108    passed: testCase.successful109  };110}111function shouldContinueUpdating (prevTest) {112  if (!prevTest.exists) return false;113  const test = prevTest.data();114  return (test.flaky || !test.passed || test.subsequentpasses < RESET_SUCCESS_COUNT) &&115    test.hasfailed;116}117function calculateFlaky (prevTest, testCase) {118  if (prevTest.exists && prevTest.data().hasfailed) {119    // test is in the queue and has failed previously120    if (testCase.successful) {121      // currently passing122      if ((prevTest.data().subsequentpasses >= RESET_SUCCESS_COUNT) || (!prevTest.data().shouldtrack)) {123        // NOT FLAKY124        return false;125      } else {126        // FLAKY127        return true;128      }129    } else {130      // currently failing131      if (!prevTest.data().passed) {132        // not flaky, just failing multiple times in a row133        return false;134      } else {135        // FLAKY136        return true;137      }138    }139  } else {140    // test is not in the queue so NOT FLAKY141    return false;142  }143}144async function updateTest (prevTest, testCaseAnalytics, testCase, buildInfo, dbRepo) {145  const failing = !testCase.successful;146  const updateObj = {147    percentpassing: testCaseAnalytics.computePassingPercent(),148    historicaltests: testCaseAnalytics.numberOfHistoricalTests(),149    hasfailed: ((prevTest.exists && prevTest.data().hasfailed) || failing),150    shouldtrack: failing || testCaseAnalytics.calculateTrack(),151    flaky: calculateFlaky(prevTest, testCase),152    passed: testCase.successful,153    failuremessageiffailing: (!testCase.successful) ? testCase.failureMessage : 'None',154    searchindex: failing ? 2 : (calculateFlaky(prevTest, testCase) ? 1 : 0),155    lastupdate: buildInfo.timestamp,156    name: testCase.name,157    subsequentpasses: testCaseAnalytics.incrementSubsequentPasses(prevTest, testCase) === 0 ? 0 : Firestore.FieldValue.increment(1),158    lifetimepasscount: (testCase.successful) ? Firestore.FieldValue.increment(1) : Firestore.FieldValue.increment(0),159    lifetimefailcount: (testCase.successful) ? Firestore.FieldValue.increment(0) : Firestore.FieldValue.increment(1)160  };161  for (const prop in buildInfo.environment) {162    updateObj['environments.' + prop] = Firestore.FieldValue.arrayUnion(buildInfo.environment[prop]);163  }164  const firestoreTimestamp = new Firestore.Timestamp(Math.floor(buildInfo.timestamp.getTime() / 1000), 0);165  if (testCase.successful) {166    updateObj.cachedSuccess = Firestore.FieldValue.arrayUnion(firestoreTimestamp);167  } else {168    updateObj.cachedFails = Firestore.FieldValue.arrayUnion(firestoreTimestamp);169  }170  await dbRepo.collection('queued').doc(testCase.encodedName).update(updateObj, { merge: true });171  while (testCaseAnalytics.deleteQueue.length > 0) {172    const deleteMe = testCaseAnalytics.deleteQueue.pop();173    const deleteObj = {};174    const deleteDate = new Firestore.Timestamp(Math.floor(deleteMe.date.getTime() / 1000), 0);175    if (deleteMe.passed) {176      deleteObj.cachedSuccess = Firestore.FieldValue.arrayRemove(deleteDate);177    } else {178      deleteObj.cachedFails = Firestore.FieldValue.arrayRemove(deleteDate);179    }180    await dbRepo.collection('queued').doc(testCase.encodedName).update(deleteObj, { merge: true });181  }182  return {183    flaky: calculateFlaky(prevTest, testCase),184    passed: testCase.successful185  };186}187async function isMostRecentBuild (buildInfo, dbRepo) {188  const curRepo = await dbRepo.get();189  if (!curRepo.exists) {190    return true;191  }192  return buildInfo.timestamp.getTime() >= curRepo.data().lastupdate.toDate().getTime();193}194async function addBuildDoc (testCases, buildInfo, computedData, dbRepo) {195  // For the Builds196  const alltests = testCases.map(x => x.encodedName); // not currently used in MVP but would be useful for finding all tests in a build197  await dbRepo.collection('builds').doc(buildInfo.buildId).set({198    percentpassing: computedData.percentpassing,199    passcount: computedData.passcount,200    failcount: computedData.failcount,201    environment: buildInfo.environment,202    timestamp: buildInfo.timestamp,203    tests: alltests,204    sha: buildInfo.sha,205    buildId: buildInfo.buildIdReadable,206    buildIdInternal: buildInfo.buildId,207    buildmessage: buildInfo.buildmessage,208    flaky: computedData.buildflaky209  });210}211async function updateRepoDoc (buildInfo, dbRepo) {212  const repoId = decodeURIComponent(buildInfo.repoId);213  const repoUpdate = {214    organization: buildInfo.organization,215    url: buildInfo.url,216    repoId: repoId,217    name: buildInfo.name,218    description: buildInfo.description,219    lower: {220      repoId: decodeURIComponent(buildInfo.repoId).toLowerCase(),221      name: buildInfo.name.toLowerCase(),222      organization: buildInfo.organization.toLowerCase()223    }224  };225  for (const prop in buildInfo.environment) {226    repoUpdate['environments.' + prop] = Firestore.FieldValue.arrayUnion(buildInfo.environment[prop]);227  }228  // The top level repository object tracks aggregate test stats from the last229  // AGGREGATE_SIZE test runs:230  // TODO: we should consider moving towards calculating this daily to save231  // on read operations.232  const queuedTestLookup = await dbRepo233    .collection('queued')234    .orderBy('searchindex', 'desc')235    .orderBy('lastupdate', 'desc')236    .offset(0)237    .limit(AGGREGATE_SIZE)238    .get();239  const queuedTests = queuedTestLookup.docs.map(doc => doc.data());240  const results = queuedTests.reduce((a, test) => {241    if (!test.passed) {242      a.failing++;243    }244    if (test.flaky) {245      a.flaky++;246    }247    return a;248  }, { flaky: 0, failing: 0 });249  repoUpdate.flaky = results.flaky;250  repoUpdate.numfails = results.failing;251  repoUpdate.searchindex = results.failing * 10000 + results.flaky;252  repoUpdate.numtestcases = queuedTestLookup.size;253  repoUpdate.lastupdate = buildInfo.timestamp;254  await dbRepo.update(repoUpdate, { merge: true });255}...

main.ts

Source:main.ts

1import { assert, expect, use } from 'chai';2import chaiAsPromised from 'chai-as-promised';3use(chaiAsPromised);4let functions: { [fnName: string]: any } = {};5let prevFn: any;6export function test<T extends Function>(asyncFn: T, suite: any) {7  prevFn = asyncFn;8  functions[prevFn.name] = asyncFn;9  return describe(prevFn.name, suite);10};11let prevMessage: string | undefined;12let curTest: Mocha.Test | undefined;13let prevTest: Mocha.Test | undefined;14let beforeTest: { [id: string]: (() => Promise<any>) | undefined } = {};15type Action = keyof ReturnType<typeof given>;16export function given(...input: any) {17  if (prevTest !== curTest) {18    prevMessage = undefined;19    curTest = prevTest;20  }21  const fn = functions[prevFn.name];22  const prevTestId = (prevTest as any)?.id ?? 0;23  const getMsg = (action: Action, expected?: any) => prevMessage ?? givenMessage(action, input, expected);24  return {25    /** Assert a boolean condition. */26    assert: (assertion: (result?: ReturnType<typeof fn>) => {}) => {27      prevTest = it(getMsg('assert', assertion), async () => {28        await beforeTest[prevTestId]?.();29        const result = await fn(...input);30        assert(assertion(result));31      });32      return given(...input);33    },34    /** Callback is called **before** test.35     * @info Called for *one assertion* only.36     * Called after `Mocha.beforeEach`. */37    before: (cb: () => any) => {38      beforeTest[prevTestId] = cb;39      return given(...input);40    },41    /** Assert the expected value deep equals the returned output. */42    expect: (expected: ReturnType<typeof fn>) => {43      prevTest = it(getMsg('expect', expected), async () => {44        await beforeTest[prevTestId]?.();45        const result = await fn(...input);46        expect(result).to.deep.equal(expected);47      });48      return given(...input);49    },50    /** Assert that a promise is not rejected. */51    resolve: () => {52      prevTest = it(getMsg('resolve'), async () => {53        await beforeTest[prevTestId]?.();54        const result = () => fn(...input);55        await expect(result()).not.to.be.rejected;56      });57      return given(...input);58    },59    /** Assert that a promise resolution deep equals a specific value. */60    resolveWith: (expected: ReturnType<typeof fn>) => {61      prevTest = it(getMsg('resolveWith', expected), async () => {        62        await beforeTest[prevTestId]?.();63        const result = await fn(...input);64        expect(result).to.deep.equal(expected);65      });66      return given(...input);67    },68    /** Add a custom message to the next assertion.69     * @info Called for *one assertion* only. */70    message: (content: string) => {71      prevMessage = content;72      return given(...input);73    },74    /** Assert that a promise is rejected. */75    reject: () => {76      prevTest = it(getMsg('reject'), async () => {77        await beforeTest[prevTestId]?.();78        const result = () => fn(...input);79        await expect(result()).to.be.rejected;80      });81      return given(...input);82    },83    /** Assert that a promise is rejected with a specific error message. */84    rejectWith: (errorMessage: string) => {85      prevTest = it(getMsg('rejectWith', errorMessage), async () => {86        await beforeTest[prevTestId]?.();        87        const result = () => fn(...input);88        await expect(result()).to.be.rejectedWith(errorMessage);89        90      });91      return given(...input);92    },93    /** Assert that an error is thrown. */94    throw: (errorMessage: string) => {95      prevTest = it(getMsg('throw', errorMessage), async () => {96        await beforeTest[prevTestId]?.();97        const result = () => fn(...input);98        expect(result).to.throw(errorMessage);99      });100      return given(...input);101    },102  }103}104function givenMessage(type: Action, input: any, expected?: any): string {105  const given = (input.length) ? JSON.stringify(input) : '()'; 106  return {107    assert: `given: ${given}, assert: ${JSON.stringify(expected)}`,108    before: prevMessage,109    expect: `given: ${given}, return: ${JSON.stringify(expected)}`,110    resolve: `given: ${given}, resolved`,111    resolveWith: `given: ${given}, resolve: ${JSON.stringify(expected)}`,112    message: prevMessage,113    reject: `given: ${given}, rejected`,114    rejectWith: `given: ${given}, reject: ${JSON.stringify(expected)}`,115    throw: `given: ${given}, throw: ${JSON.stringify(expected)}`,116  }[type]!;...

parseBinaryTestList.ts

Source:parseBinaryTestList.ts

1import * as R from 'ramda';2export type BinaryTest = {3  bin: string,4  test: string,5  code: string,6};7/**8 * Creates list of binary asm codes to be tested9 *10 * @export11 * @param {string} str12 * @returns {BinaryTest[]}13 */14export function parseBinaryTestList(str: string): BinaryTest[] {15  const truncated = R.compose(16    R.reject(R.isEmpty),17    R.split('\n'),18  )(str);19  return R.reduce(20    (tests, line) => {21      const prevTest = R.last(tests);22      if (line.indexOf(';=') === 0) {23        const colonIndex = line.indexOf(':');24        const [name, value] = [25          line.substr(3, colonIndex - 3),26          R.trim(line.substr(colonIndex + 1)),27        ];28        if (!prevTest || prevTest.code) {29          tests.push(30            <BinaryTest> {31              bin: '',32              test: '',33              code: '',34              [name]: value,35            },36          );37        } else38          prevTest[name] = value;39      } else if (prevTest)40        prevTest.code += `${line}\n`;41      return tests;42    },43    [],44    truncated,45  );...

Using AI Code Generation

1var backstop = require('backstopjs');2backstop('test', {3}).then(function () {4  backstop('approve', {5  }).then(function () {6    backstop('test', {7    }).then(function () {8      backstop('approve', {9      }).then(function () {10        backstop('test', {11        }).then(function () {12          backstop('approve', {13          }).then(function () {14            backstop('test', {15            }).then(function () {16              backstop('approve', {17              }).then(function () {18                backstop('test', {19                }).then(function () {20                  backstop('approve', {21                  }).then(function () {22                    backstop('test', {23                    }).then(function () {24                      backstop('approve', {25                      }).then(function () {26                        backstop('test', {27                        }).then(function () {28                          backstop('approve', {29                          }).then(function () {30                            backstop('test', {31                            }).then(function () {32                              backstop('approve', {33                              }).then(function () {34                                backstop('test', {35                                }).then(function () {36                                  backstop('approve', {37                                  }).then(function () {38                                    backstop('test', {39                                    }).then(function () {40                                      backstop('approve', {41                                      }).then(function () {42                                        backstop('test', {43                                        }).then(function () {44                                          backstop('approve', {45                                          }).then(function () {46                                            backstop('test', {47                                            }).then(function () {48                                              backstop('approve', {

Using AI Code Generation

1module.exports = async (page, scenario, vp) => {2  await require('./backstopjs/core/command/prevTest')(page, scenario, vp);3};4module.exports = async (page, scenario, vp) => {5  await page.waitForSelector('body');6  await page.evaluate(() => {7    window.___backstopTools.prevTest();8  });9};10module.exports = async (page, scenario, vp) => {11  await page.waitForSelector('body');12  await page.evaluate(() => {13    window.___backstopTools.prevTest();14  });15};16module.exports = async (page, scenario, vp) => {17  await page.waitForSelector('body');18  await page.evaluate(() => {19    window.___backstopTools.prevTest();20  });21};22module.exports = async (page, scenario, vp) => {23  await page.waitForSelector('body');24  await page.evaluate(() => {25    window.___backstopTools.prevTest();26  });27};28module.exports = async (page, scenario, vp) => {29  await page.waitForSelector('body');30  await page.evaluate(() => {31    window.___backstopTools.prevTest();32  });33};34module.exports = async (page, scenario, vp) => {35  await page.waitForSelector('body');36  await page.evaluate(() => {37    window.___backstopTools.prevTest();38  });39};

Using AI Code Generation

1module.exports = function (casper, scenario, vp) {2casper.then(function () {3this.evaluate(function () {4window.callPhantom('prevTest');5});6});7};8{9{10}11"paths": {12},13"engineOptions": {14},15}

Using AI Code Generation

1var engine = require('backstopjs');2var config = require('./backstop.json');3engine('test', { config: config })4.then(function () {5})6.catch(function (err) {7});8{9    {10    },11    {12    },13    {14    },15    {16    }17    {18    }19  "paths": {20  },21  "engineOptions": {},22}

Using AI Code Generation

1const Backstop = require('backstopjs');2Backstop('test', {config: './backstop.json', filter: 'test1'})3  .then(() => {4    console.log('Test completed');5  })6  .catch((e) => {7    console.error(e);8  });9{10    {11    },12    {13    },14    {15    }16    {17    },18    {19    }20  "paths": {21  },22  "engineOptions": {

Using AI Code Generation

1module.exports = require('backstopjs/core/command/test')2  .find(o => o._name === 'test')3  .action(function (args, callback) {4    const config = require('backstopjs/core/util/getConfig')();5    const scenarioManager = require('backstopjs/core/util/scenarioManager')(config);6    const scenarioList = scenarioManager.getFilteredScenarioList();7    const engine = require('backstopjs/core/engine')(config, scenarioList);8    engine.test();9  });10"scripts": {11  }

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.