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How to use alreadySeenValues method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

to-value.ts

Source:to-value.ts

1import { ObjectTreeNode, SelectorFn } from './types';2/**3 * Converts a node back into the value it represents.4 * @param node The node to convert back into a value.5 */6export function toValue<T = any>(node: ObjectTreeNode, selectChild?: SelectorFn): T {7  const identityFn = (value: any) => value;8  const childSelector = selectChild || identityFn;9  const result = convertToValue(node, new Set(), childSelector);10  return result;11}12/**13 * Converts a node back into the value it represents.14 * @param node The node to convert back into a value.15 * @param alreadySeenValues A set of objects already seen in conversion process.16 * @param selectChild A function selecting child-nodes from a given node.17 */18function convertToValue<T extends ObjectTreeNode>(19  node: T,20  alreadySeenValues: Set<any>,21  selectChild: SelectorFn<T>,22): any {23  const targetNode = selectChild(node);24  if (alreadySeenValues.has(targetNode.value)) {25    return targetNode.value;26  }27  alreadySeenValues.add(targetNode.value);28  let result: any;29  switch (targetNode.type) {30    case 'array':31      result = toArrayValue(targetNode, alreadySeenValues, selectChild);32      break;33    case 'object':34      result = toObjectValue(targetNode, alreadySeenValues, selectChild);35      break;36    default:37      result = targetNode.value;38      break;39  }40  return result;41}42function toArrayValue<T extends ObjectTreeNode>(43  node: T,44  alreadySeenValues: Set<any>,45  selectChild: SelectorFn<T>,46): any[] {47  const result: any[] = [];48  for (const child of node.children) {49    const selectedChild = selectChild(child);50    const value = convertToValue(selectedChild, alreadySeenValues, selectChild);51    result.push(value);52  }53  return result;54}55function toObjectValue<T extends ObjectTreeNode>(56  node: T,57  alreadySeenValues: Set<any>,58  selectChild: SelectorFn<T>,59): object {60  const result: any = {};61  for (const child of node.children) {62    const selectedChild = selectChild(child);63    result[selectedChild.name] = convertToValue(selectedChild, alreadySeenValues, selectChild);64  }65  return result;...

RandomEnough.spec.ts

Source:RandomEnough.spec.ts

1import * as fc from '../../src/fast-check';2import { seed } from './seed';3describe(`RandomEnough (seed: ${seed})`, () => {4  it('should not repeat values when noBias enabled', () => {5    const alreadySeenValues = new Set<string>();6    const allEmails = fc.sample(fc.tuple(fc.emailAddress(), fc.emailAddress()).noBias(), { seed });7    for (const [, email] of allEmails) {8      if (alreadySeenValues.has(email)) {9        throw new Error(`email ${email} has already been seen`);10      }11      alreadySeenValues.add(email);12    }13  });14  it('should not repeat values across arbitraries of a tuple when noBias enabled', () => {15    const alreadySeenValues = new Set<string>();16    const allEmails = fc.sample(fc.tuple(fc.emailAddress(), fc.emailAddress()).noBias(), { seed });17    for (const [emailA, emailB] of allEmails) {18      if (alreadySeenValues.has(emailA)) {19        throw new Error(`emailA ${emailA} has already been seen`);20      }21      if (alreadySeenValues.has(emailB)) {22        throw new Error(`emailB ${emailB} has already been seen`);23      }24      alreadySeenValues.add(emailA);25      alreadySeenValues.add(emailB);26    }27  });28  it('should not repeat values between two consecutive sequences', () => {29    const [seqA, seqB] = fc.sample(fc.array(fc.integer(), { minLength: 1000, maxLength: 1000 }).noBias(), {30      seed,31      numRuns: 2,32    });33    const numIdenticalValues = seqA.reduce((acc, item) => {34      return seqB.includes(item) ? acc + 1 : acc;35    }, 0);36    // Given the two generated arrays contain values equiprobably taken from the range -2**31 to 2**31-137    // The probability to have one value of seqA in seqB is:38    // P(N = 1k) = 1 - ((2**32 - N) / 2**32) * ... * ((2**32 - N) / 2**32)    {N times}39    //           = 0.023280356780186473 %40    //           = 1 over 430041    // Python code: >>> N = 1000 ; print(1 - (2**32 - N)**N / (2**(32*N)))42    expect(numIdenticalValues).toBeLessThanOrEqual(5);43  });...

Using AI Code Generation

1const fc = require('fast-check');2const { alreadySeenValues } = require('fast-check/lib/check/model/RunDetails.js');3const { configureGlobal } = require('fast-check/lib/check/runner/configuration/GlobalParameters.js');4const globalParams = configureGlobal({ verbose: 1 });5const run = fc.run(fc.integer(), globalParams);6const values = alreadySeenValues(run);7console.log(values);

Using AI Code Generation

1const { alreadySeenValues } = require('fast-check');2const { assert } = require('chai');3describe('test3', () => {4  it('test3', () => {5    const seen = alreadySeenValues();6    assert.equal(seen.has(1), false);7    seen.record(1);8    assert.equal(seen.has(1), true);9  });10});11"devDependencies": {12  }13"devDependencies": {14  }15"devDependencies": {16  }17"devDependencies": {18  }19"devDependencies": {

Using AI Code Generation

1const { alreadySeenValues } = require('fast-check');2const { fc } = require('fast-check');3const { generate } = require('fast-check');4const { property } = require('fast-check');5const { tuple } = require('fast-check');6const { string } = require('fast-check');7const { set } = require('fast-check');8const { array } = require('fast-check');9const generateWithAlreadySeenValues = (arb, alreadySeenValues) => {10  return generate(arb, { seed: 0, numRuns: 0, verbose: false, pa

Using AI Code Generation

1const fc = require("fast-check");2const { alreadySeenValues } = require("fast-check/lib/check/arbitrary/definition/AlreadySeenValues");3const sortedArray = fc.array(fc.integer(), 1, 20).map((arr) => {4  return arr.sort((a, b) => a - b);5});6const isSorted = (arr) => {7  for (let i = 1; i < arr.length; i++) {8    if (arr[i] < arr[i - 1]) {9      return false;10    }11  }12  return true;13};14fc.assert(15  fc.property(sortedArray, (arr) => {16    return isSorted(arr);17  })18);19const fc = require("fast-check");20const { alreadySeenValues } = require("fast-check/lib/check/arbitrary/definition/AlreadySeenValues");21const sortedArray = fc.array(fc.integer(), 1, 20).map((arr) => {22  return arr.sort((a, b) => a - b);23});24const isSorted = (arr) => {25  for (let i = 1; i < arr.length; i++) {26    if (arr[i] < arr[i - 1]) {27      return false;28    }29  }30  return true;31};32fc.assert(33  fc.property(sortedArray, (arr) => {34    return isSorted(arr);35  })36);

Using AI Code Generation

1const fc = require('fast-check');2const { alreadySeenValues } = require('fast-check-monorepo');3const myArb = fc.integer(0, 100);4const myArb2 = fc.array(myArb);5const seenValues = new Map();6fc.assert(7  fc.property(myArb2, (a) => {8    if (alreadySeenValues(a, seenValues)) {9      console.log('already seen: ' + a);10      console.log('seen ' + seenValues.get(a) + ' times');11    }12    return true;13  })14);

Using AI Code Generation

1const fc = require("fast-check");2const alreadySeenValues = [];3  .array(fc.integer())4  .map((array) => array.filter((value) => !alreadySeenValues.includes(value)))5  .filter((array) => array.length > 0);6newValues.forEach((value) => alreadySeenValues.push(value));7const fc = require("fast-check");8const alreadySeenValues = [];9  .array(fc.integer())10  .map((array) => array.filter((value) => !alreadySeenValues.includes(value)))11  .filter((array) => array.length > 0);12newValues.forEach((value) => alreadySeenValues.push(value));13const fc = require("fast-check");14const alreadySeenValues = [];15  .array(fc.integer())16  .map((array) => array.filter((value) => !alreadySeenValues.includes(value)))17  .filter((array) => array.length > 0);18newValues.forEach((value) => alreadySeenValues.push(value));19const fc = require("fast-check");20const alreadySeenValues = [];21  .array(fc.integer())22  .map((array) => array.filter((value) => !alreadySeenValues.includes(value)))23  .filter((array) => array.length > 0);24newValues.forEach((value) => alreadySeenValues.push(value));

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