How to use restoreGlobals method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

main.spec.ts

Source:main.spec.ts

2describe('assertNoPoisoning', () => {3  it('should not throw any Error if no poisoning occurred', () => {4    // Arrange / Act / Assert5    expect(() => assertNoPoisoning()).not.toThrow();6    restoreGlobals();7    expect(() => assertNoPoisoning()).not.toThrow();8  });9  it('should throw an Error if new global appeared and be able to revert the change', () => {10    // Arrange11    // eslint-disable-next-line @typescript-eslint/ban-ts-comment12    // @ts-ignore13    globalThis.a = 'Hello';14    // Act / Assert15    try {16      expect(() => assertNoPoisoning()).toThrowError(/Poisoning detected/);17      restoreGlobals();18      expect(() => assertNoPoisoning()).not.toThrow();19    } finally {20      // eslint-disable-next-line @typescript-eslint/ban-ts-comment21      // @ts-ignore22      delete globalThis.a;23    }24  });25  it('should throw an Error if global removed and be able to revert the change', () => {26    // Arrange27    const F = globalThis.Function;28    // eslint-disable-next-line @typescript-eslint/ban-ts-comment29    // @ts-ignore30    delete globalThis.Function;31    // Act / Assert32    try {33      expect(() => assertNoPoisoning()).toThrowError(/Poisoning detected/);34      restoreGlobals();35      expect(() => assertNoPoisoning()).not.toThrow();36    } finally {37      globalThis.Function = F;38    }39  });40  it('should throw an Error if global altered via globalThis and be able to revert the change', () => {41    // Arrange42    const F = globalThis.Function;43    globalThis.Function = jest.fn();44    // Act / Assert45    try {46      expect(() => assertNoPoisoning()).toThrowError(/Poisoning detected/);47      restoreGlobals();48      expect(() => assertNoPoisoning()).not.toThrow();49    } finally {50      globalThis.Function = F;51    }52  });53  it('should throw an Error if global value altered and be able to revert the change', () => {54    // Arrange55    const F = Function;56    // eslint-disable-next-line no-global-assign57    Function = jest.fn();58    // Act / Assert59    try {60      expect(() => assertNoPoisoning()).toThrowError(/Poisoning detected/);61      restoreGlobals();62      expect(() => assertNoPoisoning()).not.toThrow();63    } finally {64      // eslint-disable-next-line no-global-assign65      Function = F;66    }67  });68  it('should throw an Error if globalThis gets changed into another type and be able to revert the change', () => {69    // Arrange70    const G = globalThis;71    (globalThis as any) = 1;72    // Act / Assert73    let error: unknown = undefined;74    try {75      assertNoPoisoning();76    } catch (err) {77      error = err;78    }79    if (error === undefined) {80      (globalThis as any) = G;81      throw new Error('No error has been thrown');82    }83    if (!/Poisoning detected/.test((error as Error).message)) {84      (globalThis as any) = G;85      throw new Error(`Received error does not fulfill expectations, got: ${error}`);86    }87    try {88      restoreGlobals();89      expect(() => assertNoPoisoning()).not.toThrow();90    } finally {91      (globalThis as any) = G;92    }93  });94  it('should be able to handle highly destructive changes removing important primitives', () => {95    // Arrange96    const own = Object.getOwnPropertyNames;97    function dropAll<T>(name: string, obj: T): void {98      let numDeleted = 0;99      for (const k of own(obj)) {100        try {101          // eslint-disable-next-line @typescript-eslint/ban-ts-comment102          // @ts-ignore103          delete obj[k];104          ++numDeleted;105        } catch (err) {106          // Object.prototype cannot be deleted, and others might too107        }108      }109      if (numDeleted === 0) {110        throw new Error(`No property has been deleted from ${name}`);111      }112    }113    dropAll('Object.prototype', Object.prototype);114    dropAll('Object', Object);115    dropAll('Array.prototype', Array.prototype);116    dropAll('Array', Array);117    dropAll('Set.prototype', Set.prototype);118    dropAll('Set', Set);119    dropAll('Map.prototype', Map.prototype);120    dropAll('Map', Map);121    dropAll('Function.prototype', Function.prototype);122    dropAll('Function', Function);123    dropAll('Error.prototype', Error.prototype);124    dropAll('Error', Error);125    // Act / Assert126    // Manual expectation mimicing "expect(() => assertNoPoisoning()).toThrowError(/Poisoning detected/)"127    // as Jest makes use of Object.keys and probably others in its code128    let caughtError: unknown = undefined;129    try {130      assertNoPoisoning();131    } catch (err) {132      caughtError = err;133    }134    if (caughtError === undefined) {135      throw new Error('Expected an error be thrown during the test');136    }137    if (!(caughtError instanceof Error)) {138      throw new Error('Expected an error of type Error to be thrown during the test');139    }140    restoreGlobals();141    expect(() => assertNoPoisoning()).not.toThrow();142    // WARNING: If restoreGlobals failed, then this test may break others143  });...

setup.test.js

Source:setup.test.js

...22    setupGloabls();23    jest.resetModuleRegistry();24  });25  afterEach(() => {26    restoreGlobals();27  });28  ['_localStorage', '_sessionStorage'].forEach((gKey) => {29    it(`[${gKey}] should define a property on the global object with writable false`, () => {30      require('../src/setup');31      expect(global[gKey.replace('_', '')].constructor.name).toBe(32        'LocalStorage'33      );34    });35    it(`[${gKey}] should define a property on the global object with writable false`, () => {36      global[gKey] = true;37      require('../src/setup');38      let e;39      try {40        global[`_${gKey.replace('_', '')}`] = 'blah';...

helpers.js

Source:helpers.js

1const _ = require('lodash');2const { defaultConfig } = require('./default-data');34// https://stackoverflow.com/a/534511965const flushPromises = () => new Promise(resolve => setTimeout(resolve));67const setGlobals = () => {8    global.configuration = _.cloneDeep(defaultConfig);9    global.DEBUG = (...args) => console.log(...args);10}1112const restoreGlobals = () => {13    global.configuration = undefined;14    global.DEBUG = undefined;15    global.helpers = undefined;16}17
...

Using AI Code Generation

1restoreGlobals();2restoreGlobals();3restoreGlobals();4restoreGlobals();5restoreGlobals();6restoreGlobals();7restoreGlobals();8restoreGlobals();9restoreGlobals();10restoreGlobals();11restoreGlobals();12restoreGlobals();13restoreGlobals();14restoreGlobals();15restoreGlobals();16restoreGlobals();17restoreGlobals();18restoreGlobals();19restoreGlobals();

Using AI Code Generation

1import { restoreGlobals } from 'fast-check-monorepo/test-utils';2import * as fc from 'fast-check';3import { myFunction } from './myFunction';4describe('myFunction', () => {5  it('should return a string', () => {6    fc.assert(7      fc.property(fc.string(), (s) => {8        const result = myFunction(s);9        expect(typeof result).toBe('string');10      })11    );12  });13});14import * as fc from 'fast-check';15export function myFunction(s) {16  fc.pre(typeof s === 'string');17  return s;18}

Using AI Code Generation

1const fc = require('fast-check');2const { restoreGlobals } = require('fast-check/lib/check/arbitrary/GlobalParameters');3fc.configureGlobal({4});5fc.assert(6  fc.property(fc.integer(), (n) => {7    return n === n;8  })9);10restoreGlobals();11fc.assert(12  fc.property(fc.integer(), (n) => {13    return n === n;14  })15);16fc.assert: 1000 passed, 0 failed, 0 skipped, 0 invalid (0s)17fc.assert: 1000 passed, 0 failed, 0 skipped, 0 invalid (0s)18fc.assert: 1000 passed, 0 failed, 0 skipped, 0 invalid (0s)19fc.assert: 0 passed, 1000 failed, 0 skipped, 0 invalid (0s)20npm ERR! 404 You should bug the author to publish it (or use the name yourself!)

Using AI Code Generation

1const fc = require('fast-check');2const { restoreGlobal } = require('fast-check/lib/esm/check/arbitrary/GlobalRestore.js');3const { restoreGlobal } = require('fast-check/lib/esm/check/arbitrary/GlobalRestore.js');4fc.assert(5  fc.property(fc.integer(), fc.integer(), (a, b) => {6    const s = a + b;7    const p = a * b;8    return s - p === a - b;9  })10);11restoreGlobal();12fc.assert(13  fc.property(fc.integer(), fc.integer(), (a, b) => {14    const s = a + b;15    const p = a * b;16    return s - p === a - b;17  })18);

Using AI Code Generation

1const fc = require('fast-check');2const { restoreGlobals } = require('fast-check/lib/esm/globals');3describe('test', () => {4  it('test', () => {5    fc.assert(6      fc.property(fc.integer(), (n) => {7        expect(n).toBeGreaterThanOrEqual(0);8      })9    );10  });11});12module.exports = {13  transform: {14  },15};16module.exports = {17};18{19  "scripts": {20  },21  "devDependencies": {22  }23}

Using AI Code Generation

1const { restoreGlobals } = require('fast-check');2const a = 1;3restoreGlobals();4const b = 1;5console.log(a, b);6[Restore globals issue #1711](github.com/dubzzz/fast-check/...)

Using AI Code Generation

1const fc = require('fast-check');2const restoreGlobals = require('fast-check').restoreGlobals;3const { sample } = require('fast-check');4const { assert } = require('chai');5const { equal: deepEqual } = require('fast-deep-equal');6const { describe, it } = require('mocha');7describe('test', () => {8  it('test', () => {9    console.log('test');10    assert.equal(1, 1);11    assert.deepEqual([1, 2, 3], [1, 2, 3]);

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.