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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);

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