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

Copied to Clipboard!

How to use seedArb method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

main.spec.ts

Source:main.spec.ts

1import { mazeGenerator, CellType, Point } from './src/mazeGenerator';2import fc from 'fast-check';3import * as _ from 'lodash';4describe('mazeGenerator', () => {5  it('should contain a single start point located at the specified point', () => {6    fc.assert(7      fc.property(seedArb, inputsArb, (seed, ins) => {8        const maze = mazeGenerator(seed, ins.dim, ins.startPt, ins.endPt);9        expect(maze[ins.startPt.y][ins.startPt.x]).toBe(CellType.Start);10        expect(_.flatten(maze).filter((c) => c === CellType.Start)).toHaveLength(1);11      })12    );13  });14  it('should contain a single end point located at the specified point', () => {15    fc.assert(16      fc.property(seedArb, inputsArb, (seed, ins) => {17        const maze = mazeGenerator(seed, ins.dim, ins.startPt, ins.endPt);18        expect(maze[ins.endPt.y][ins.endPt.x]).toBe(CellType.End);19        expect(_.flatten(maze).filter((c) => c === CellType.End)).toHaveLength(1);20      })21    );22  });23  it('should have at least one path from start to end', () => {24    fc.assert(25      fc.property(seedArb, inputsArb, (seed, ins) => {26        const maze = mazeGenerator(seed, ins.dim, ins.startPt, ins.endPt);27        return hasPathFromStartToEnd(maze, ins.startPt);28      })29    );30  });31  it('should not have any path loops', () => {32    fc.assert(33      fc.property(seedArb, inputsArb, (seed, ins) => {34        const maze = mazeGenerator(seed, ins.dim, ins.startPt, ins.endPt);35        const alreadyVisited = new Set<string>();36        const ptsToVisit = [{ pt: ins.startPt, src: ins.startPt }];37        while (ptsToVisit.length > 0) {38          const [{ pt, src }] = ptsToVisit.splice(ptsToVisit.length - 1);39          const ptString = `x:${pt.x},y:${pt.y}`;40          if (alreadyVisited.has(ptString)) {41            // We already got to this cell from another path42            // There is an unexpected loop in the generated maze43            return false;44          }45          alreadyVisited.add(ptString);46          ptsToVisit.push(47            ...neighboorsFor(pt)48              // We do not go back on our tracks49              .filter((nPt) => nPt.x !== src.x || nPt.y !== src.y)50              .filter((nPt) => {51                const cell = cellTypeAt(maze, nPt);52                return cell !== null && cell !== CellType.Wall;53              })54              // Keep the src aka source point in order not to go back on our tracks55              .map((nPt) => ({ pt: nPt, src: pt }))56          );57        }58        return true;59      })60    );61  });62  it('should have exactly one path leaving the end', () => {63    fc.assert(64      fc.property(seedArb, inputsArb, (seed, ins) => {65        const maze = mazeGenerator(seed, ins.dim, ins.startPt, ins.endPt);66        const numPathsLeavingEnd = neighboorsFor(ins.endPt).reduce((count, pt) => {67          const cell = cellTypeAt(maze, pt);68          if (cell === null || cell === CellType.Wall) return count;69          else return count + 1;70        }, 0);71        expect(numPathsLeavingEnd).toBe(1);72      })73    );74  });75  it('should have only non-isolated path, start, end', () => {76    fc.assert(77      fc.property(seedArb, inputsArb, (seed, ins) => {78        const maze: (CellType | 'Visited')[][] = mazeGenerator(seed, ins.dim, ins.startPt, ins.endPt);79        const ptsToVisit = [ins.startPt, ins.endPt];80        while (ptsToVisit.length > 0) {81          const [pt] = ptsToVisit.splice(ptsToVisit.length - 1);82          maze[pt.y][pt.x] = 'Visited';83          ptsToVisit.push(84            ...neighboorsFor(pt).filter((nPt) => {85              const cell = cellTypeAt(maze, nPt);86              return cell !== null && cell !== CellType.Wall && cell !== 'Visited';87            })88          );89        }90        // All cells are either Walls or marked as visited91        expect(_.flatten(maze).filter((c) => c !== CellType.Wall && c !== 'Visited')).toHaveLength(0);92      })93    );94  });95});96// Helpers97const seedArb = fc.integer().noBias().noShrink();98const dimensionArb = fc.record({99  width: fc.integer({ min: 2, max: 20 }),100  height: fc.integer({ min: 2, max: 20 }),101});102const inputsArb = dimensionArb103  .chain((dim) => {104    return fc.record({105      dim: fc.constant(dim),106      startPt: fc.record({ x: fc.nat(dim.width - 1), y: fc.nat(dim.height - 1) }),107      endPt: fc.record({ x: fc.nat(dim.width - 1), y: fc.nat(dim.height - 1) }),108    });109  })110  .filter((ins) => ins.startPt.x !== ins.endPt.x || ins.startPt.y !== ins.endPt.y);111const neighboorsFor = (pt: Point): Point[] => {112  return [113    { x: pt.x - 1, y: pt.y },114    { x: pt.x + 1, y: pt.y },115    { x: pt.x, y: pt.y - 1 },116    { x: pt.x, y: pt.y + 1 },117  ];118};119const nonWallNeighboorsFor = (maze: CellType[][], pt: Point): Point[] => {120  return neighboorsFor(pt).filter((nPt) => {121    const cell = cellTypeAt(maze, nPt);122    return cell !== null && cell !== CellType.Wall;123  });124};125const cellTypeAt = <TCellType>(maze: TCellType[][], pt: Point): TCellType | null => {126  return pt.x < 0 || pt.x >= maze[0].length || pt.y < 0 || pt.y >= maze.length ? null : maze[pt.y][pt.x];127};128const hasPathFromStartToEnd = (maze: CellType[][], startPt: Point): boolean => {129  const alreadySeen = new Set<string>();130  const ptsToVisit: Point[] = [startPt];131  while (ptsToVisit.length > 0) {132    const [pt] = ptsToVisit.splice(ptsToVisit.length - 1);133    if (maze[pt.y][pt.x] === CellType.End) return true;134    const ptString = `x:${pt.x},y:${pt.y}`;135    if (alreadySeen.has(ptString)) continue;136    alreadySeen.add(ptString);137    ptsToVisit.push(...nonWallNeighboorsFor(maze, pt));138  }139  return false;...

Using AI Code Generation

1const fc = require('fast-check');2const seedArb = require('fast-check-monorepo').seedArb;3const seed = fc.sample(seedArb, 1)[0];4const listArb = fc.array(fc.integer(), { minLength: 1, maxLength: 10 });5const list = fc.sample(listArb, 1, { seed })[0];6console.log(list);7const fc = require('fast-check');8const seedArb = require('fast-check-monorepo').seedArb;9const seed = fc.sample(seedArb, 1)[0];10const listArb = fc.array(fc.integer(), { minLength: 1, maxLength: 10 });11const list = fc.sample(listArb, 1, { seed })[0];12console.log(list);13const fc = require('fast-check');14const seedArb = require('fast-check-monorepo').seedArb;15const seed = fc.sample(seedArb, 1)[0];16const listArb = fc.array(fc.integer(), { minLength: 1, maxLength: 10 });17const list = fc.sample(listArb, 1, { seed })[0];18console.log(list);19const fc = require('fast-check');20const seedArb = require('fast-check-monorepo').seedArb;21const seed = fc.sample(seedArb, 1)[0];22const listArb = fc.array(fc.integer(), { minLength: 1, maxLength: 10 });23const list = fc.sample(listArb, 1, { seed })[0];24console.log(list);25const fc = require('fast-check');26const seedArb = require('fast-check-monorepo').seedArb;27const seed = fc.sample(seedArb, 1)[

Using AI Code Generation

1const { seedArb } = require('fast-check');2const { seed } = seedArb.sampleOne();3console.log(seed);4const { seedArb } = require('fast-check');5const { seed } = seedArb.sampleOne();6console.log(seed);7To use the seedArb.sampleOne() method, we need to pass a seed as an argument. We can use the seedArb.sampleOne

Using AI Code Generation

1const seedArb = require('fast-check/lib/arbitrary/seed').seedArb;2const seed = seedArb.generate(mrng(42));3console.log(seed);4'use strict';5Object.defineProperty(exports, '__esModule', { value: true });6const seedArbitraryBuilder = require('./SeedArbitraryBuilder');7exports.seedArb = seedArbitraryBuilder.build();

Using AI Code Generation

1const fc = require('fast-check');2const fs = require('fs');3const alphabet = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';4const len = 1000000;5fc.seedArb(fc.stringOf(fc.constantFrom(...alphabet), { maxLength: len }), 1)6  .then(s => fs.writeFileSync('test3.txt', s, 'utf8'))7  .catch(console.error);

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.