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How to use schemeArb method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

arbitraries.ts

Source:arbitraries.ts

1const { curried2 } = require("jsverify/lib/utils");2import { Record } from "../generated/registry/api";3const lazyseq = require("lazy-seq");4import uuid = require("uuid/v4");5import * as _ from "lodash";6import jsc from "./jsverify";7function fromCode(code: number) {8    return String.fromCharCode(code);9}10function toCode(c: string) {11    return c.charCodeAt(0);12}13const charArb = jsc.integer(32, 0xff).smap(fromCode, toCode);14/**15 * Generates a random string with characters greater than code 32 (so no random16 * TTY crap that can't be matched by any regex17 */18export const stringArb = jsc19    .array(charArb)20    .smap(chars => chars.join(""), string => string.split(""));21export const lowerCaseAlphaCharArb = jsc22    .integer(97, 122)23    .smap(fromCode, toCode);24export const numArb = jsc.integer(48, 57).smap(fromCode, toCode);25export const lcAlphaNumCharArb = jsc.oneof([numArb, lowerCaseAlphaCharArb]);26export const lcAlphaNumStringArb = jsc27    .array(lcAlphaNumCharArb)28    .smap((arr: any) => arr.join(""), (string: string) => string.split(""));29export const lcAlphaNumStringArbNe = jsc30    .nearray(lcAlphaNumCharArb)31    .smap((arr: any) => arr.join(""), (string: string) => string.split(""));32export const lcAlphaStringArb = jsc33    .array(lowerCaseAlphaCharArb)34    .smap(chars => chars.join(""), string => string.split(""));35export const lcAlphaStringArbNe = jsc36    .nearray(lowerCaseAlphaCharArb)37    .smap(chars => chars.join(""), string => string.split(""));38export const peopleNameArb = jsc39    .tuple([lcAlphaStringArbNe, lcAlphaStringArbNe])40    .smap(strArr => strArr.join(" "), string => string.split(" "));41const uuidArb: jsc.Arbitrary<string> = jsc.bless({42    generator: jsc.generator.bless(x => uuid()),43    shrink: jsc.shrink.bless(x => []),44    show: (x: string) => x45});46export const recordArb = jsc.record<Record>({47    id: uuidArb,48    name: stringArb,49    aspects: jsc.suchthat(jsc.array(jsc.json), arr => arr.length <= 10),50    sourceTag: jsc.constant(undefined)51});52export const specificRecordArb = (aspectArbs: {53    [key: string]: jsc.Arbitrary<any>;54}) =>55    jsc.record<Record>({56        id: uuidArb,57        name: stringArb,58        aspects: jsc.record(aspectArbs),59        sourceTag: jsc.constant(undefined)60    });61const defaultSchemeArb = jsc.oneof([62    jsc.constant("http"),63    jsc.constant("https"),64    jsc.constant("ftp"),65    lcAlphaNumStringArbNe66]);67type UrlArbOptions = {68    schemeArb?: jsc.Arbitrary<string>;69    hostArb?: jsc.Arbitrary<string>;70};71function shrinkArrayWithMinimumSize<T>(72    size: number73): (x: jsc.Shrink<T>) => jsc.Shrink<T[]> {74    function shrinkArrayImpl(...args: any[]) {75        const shrink: (x: any) => Array<any> = args[0];76        const result: any = jsc.shrink.bless(function(arr: Array<any>) {77            if (arr.length <= size) {78                return lazyseq.nil;79            } else {80                var x = arr[0];81                var xs = arr.slice(1);82                return lazyseq83                    .cons(xs, lazyseq.nil)84                    .append(85                        shrink(x).map(function(xp: any) {86                            return [xp].concat(xs);87                        })88                    )89                    .append(90                        shrinkArrayImpl(shrink, xs).map(function(xsp: any) {91                            return [x].concat(xsp);92                        })93                    );94            }95        });96        return curried2(result, args);97    }98    return shrinkArrayImpl;99}100export type MonadicArb<T> = jsc.Arbitrary<T> & {101    flatMap<U>(102        arbForward: (t: T) => jsc.Arbitrary<U>,103        backwards: (u: U) => T104    ): MonadicArb<U>;105};106/** Sometimes jsc returns a lazy-seq when it should return an array, this makes sure it's an array. */107function unSeq<T>(maybeArray: any): T[] {108    return maybeArray.toArray ? maybeArray.toArray() : maybeArray;109}110export function arbFlatMap<T, U>(111    arb: jsc.Arbitrary<T>,112    arbForward: (t: T) => jsc.Arbitrary<U>,113    backwards: (u: U) => T,114    show: (u: U) => string | undefined = u => JSON.stringify(u)115): MonadicArb<U> {116    const x = jsc.bless<U>({117        generator: arb.generator.flatmap((t: T) => {118            return arbForward(t).generator;119        }),120        show,121        shrink: jsc.shrink.bless((u: U) => {122            const t = backwards(u);123            if (_.isUndefined(t)) {124                return [];125            }126            const ts = unSeq<T>(arb.shrink(t));127            const us = _(ts)128                .flatMap(thisT => {129                    const newArb = arbForward(thisT);130                    const newU = (jsc.sampler(newArb, ts.length)(1) as any)[0];131                    return _.take(unSeq<U>(newArb.shrink(newU)), 3);132                })133                .value();134            return us;135        })136    });137    return {138        ...x,139        flatMap<V>(140            arbForward: (u: U) => jsc.Arbitrary<V>,141            backwards: (v: V) => U142        ): MonadicArb<V> {143            return arbFlatMap<U, V>(x, arbForward, backwards);144        }145    };146}147function generateArrayOfSize<T>(148    arrSize: number,149    gen: jsc.Generator<T>150): jsc.Generator<T[]> {151    var result = jsc.generator.bless(function(size: number) {152        var arr = new Array(arrSize);153        for (var i = 0; i < arrSize; i++) {154            arr[i] = gen(size);155        }156        return arr;157    });158    return result;159}160/** Generates an array that is guaranteed to be of the supplied size */161export function arrayOfSizeArb<T>(162    size: number,163    arb: jsc.Arbitrary<T>164): jsc.Arbitrary<T[]> {165    return jsc.bless<T[]>({166        generator: generateArrayOfSize(size, arb.generator),167        shrink: shrinkArrayWithMinimumSize<T>(size)(arb.shrink),168        show: x => x.toString()169    });170}171/**172 * Randomly generates a scheme, host, port and path for a URL.173 */174const urlPartsArb = (options: UrlArbOptions) =>175    jsc.record({176        scheme: options.schemeArb,177        host: jsc.suchthat(178            options.hostArb,179            (string: string) => !string.startsWith("ftp")180        ),181        port: jsc.oneof([182            jsc.integer(1, 65000),183            jsc.constant(80),184            jsc.constant(21)185        ]),186        path: jsc.array(lcAlphaNumStringArbNe)187    });188/** Generates a URL for a distribution - this could be ftp, http or https */189export const distUrlArb = ({190    schemeArb = defaultSchemeArb,191    hostArb = lcAlphaNumStringArbNe192}: UrlArbOptions = {}) =>193    urlPartsArb({ schemeArb, hostArb }).smap(194        urlParts => {195            const port =196                (urlParts.scheme === "http" && urlParts.port === 80) ||197                (urlParts.scheme === "ftp" && urlParts.port === 21)198                    ? ""199                    : ":" + urlParts.port;200            return `${urlParts.scheme}://${urlParts.host}.com${port}/${(201                urlParts.path || []202            ).join("/")}` as string;203        },204        (url: string) => {205            const splitAfterScheme = url.split("://");206            const scheme = splitAfterScheme[0];207            const splitOnDotCom = splitAfterScheme[1].split(/\.com:?/);208            const host = splitOnDotCom[0];209            const pathSegments = splitOnDotCom[1].split("/");210            const port: number = parseInt(pathSegments[0]);211            const path = pathSegments.slice(1);212            return { scheme, host, port, path };213        }214    );215/**216 * Can be passed into distStringsArb to override the default arbitraries.217 */218export type DistStringsOverrideArbs = {219    url?: jsc.Arbitrary<string>;220    license?: jsc.Arbitrary<string>;221    format?: jsc.Arbitrary<string>;222};223/**224 * Can be passed into sourceLinkArb to override the default arbitraries.225 */226export type SourceLinkOverrideArbs = {227    status?: jsc.Arbitrary<string | undefined>;228};229/**230 * Can be passed into datasetFormatArb to override the default arbitaries.231 */232export type DatasetFormatOverrideArbs = {233    format?: jsc.Arbitrary<string>;234};235/**236 * Generates the content of a distribution's dcat-distribution-strings aspect.237 */238export const distStringsArb = ({239    url = jsc.oneof([distUrlArb(), jsc.constant(undefined)]),240    license = stringArb,241    format = stringArb242}: DistStringsOverrideArbs) =>243    jsc.record({244        downloadURL: url,245        accessURL: url,246        license,247        format248    });249/**250 * Generates the content of source link status aspect251 */252export const sourceLinkArb = ({253    status = jsc.constant("active")254}: SourceLinkOverrideArbs) =>255    jsc.record({256        status: status257    });258/**259 *260 */261export const datasetFormatArb = ({262    format = stringArb263}: DatasetFormatOverrideArbs) =>264    jsc.record({265        format266    });267/**268 * Generates records, allowing specific arbs to be defined for the distribution.269 */270export const recordArbWithDistArbs = (271    distStringsOverrides: DistStringsOverrideArbs = {},272    sourceLinkOverrides: SourceLinkOverrideArbs = {},273    datasetFormatOverrides: DatasetFormatOverrideArbs = {}274) =>275    specificRecordArb({276        "dataset-distributions": jsc.record({277            distributions: jsc.array(278                specificRecordArb({279                    "dcat-distribution-strings": distStringsArb(280                        distStringsOverrides281                    ),282                    "dataset-format": datasetFormatArb(datasetFormatOverrides),283                    "source-link-status": sourceLinkArb(sourceLinkOverrides)284                })285            )286        })287    });288/**289 * Randomly generates a record with the passed objects under its290 * distributions' dcat-distribution-strings aspect.291 */292export const recordArbWithDists = (dists: object[]) =>293    specificRecordArb({294        "dataset-distributions": jsc.record({295            distributions: jsc.tuple(296                dists.map(dist =>297                    specificRecordArb({298                        "dcat-distribution-strings": jsc.constant(dist)299                    })300                )301            )302        })303    });304/**305 * Randomly returns a subset of the array, in-order.306 */307export function someOf<T>(array: T[]): jsc.Arbitrary<T[]> {308    return jsc309        .record({310            length: jsc.integer(0, array.length),311            start: jsc.integer(0, array.length - 1)312        })313        .smap(314            ({ length, start }) =>315                _(array)316                    .drop(start)317                    .take(length)318                    .value(),319            (newArray: T[]) => {320                const start = _.indexOf(array, newArray[0]);321                const length = newArray.length - start;322                return { start, length };323            }324        );325}326/**327 * Fuzzes a string, changing the case and putting random strings around it328 * and in spaces.329 */330export function fuzzStringArb(331    string: string,332    fuzzArb: jsc.Arbitrary<string> = stringArb333): jsc.Arbitrary<string> {334    const words = string.split(/[^a-zA-Z\d]+/);335    const aroundArbs = arrayOfSizeArb(words.length + 1, fuzzArb);336    return arbFlatMap(337        aroundArbs,338        around => {339            const string = _(around)340                .zip(words)341                .flatten()342                .join("");343            const caseArb = arrayOfSizeArb(string.length, jsc.bool);344            return jsc.record({ string: jsc.constant(string), cases: caseArb });345        },346        ({ string, cases }) => {347            const wordsRegex = new RegExp(words.join("|"));348            return string.split(wordsRegex);349        }350    ).smap(351        ({ string, cases }) =>352            _353                .map(string, (char, index) => {354                    if (cases[index]) {355                        return char.toUpperCase();356                    } else {357                        return char.toLowerCase();358                    }359                })360                .join(""),361        string => ({362            cases: _.map(string, (char, index) => char === char.toUpperCase()),363            string364        })365    );366}367/**368 * Gets the result of the passed string arbitrary and fuzzes it, changing369 * the case and putting random strings around it and in spaces.370 */371export function fuzzStringArbResult(372    stringArb: jsc.Arbitrary<string>,373    fuzzArb?: jsc.Arbitrary<string>374) {375    return arbFlatMap(376        stringArb,377        string => fuzzStringArb(string, fuzzArb),378        fuzzedString => undefined379    );380}381export const dateStringArb = jsc.datetime.smap(382    date => date.toString(),383    string => new Date(Date.parse(string))...

Using AI Code Generation

1const fc = require("fast-check");2const { schemeArb } = require("fast-check-monorepo");3const scheme = schemeArb().generate(fc.random());4console.log(scheme);5const fc = require("fast-check");6const { schemeArb } = require("fast-check-monorepo");7const scheme = schemeArb().generate(fc.random());8console.log(scheme);9const fc = require("fast-check");10const { schemeArb } = require("fast-check-monorepo");11const scheme = schemeArb().generate(fc.random());12console.log(scheme);13const fc = require("fast-check");14const { schemeArb } = require("fast-check-monorepo");15const scheme = schemeArb().generate(fc.random());16console.log(scheme);17const fc = require("fast-check");18const { schemeArb } = require("fast-check-monorepo");19const scheme = schemeArb().generate(fc.random());20console.log(scheme);21const fc = require("fast-check");22const { schemeArb } = require("fast-check-monorepo");23const scheme = schemeArb().generate(fc.random());24console.log(scheme);25const fc = require("fast-check");26const { schemeArb } = require("fast-check-monorepo");27const scheme = schemeArb().generate(fc.random());28console.log(scheme);29const fc = require("fast-check");30const { schemeArb } = require("fast-check-monorepo");31const scheme = schemeArb().generate(fc.random());32console.log(scheme);33const fc = require("fast-check");34const {

Using AI Code Generation

1import { schemeArb } from 'fast-check-monorepo';2import { assert } from 'chai';3describe('schemeArb', () => {4  it('should generate a scheme', () => {5    const scheme = schemeArb().generate();6  });7});

Using AI Code Generation

1import schemeArb from 'fast-check-monorepo/lib/Arbitrary/schemeArb'2const scheme = {type: 'string'};3const arb = schemeArb(scheme);4fc.assert(fc.property(arb, value => {5  assert(typeof value === 'string');6}));7const scheme = {type: 'array', items: {type: 'string'}};8const arb = schemeArb(scheme);9fc.assert(fc.property(arb, value => {10  assert(Array.isArray(value));11  assert(value.every(v => typeof v === 'string'));12}));

Using AI Code Generation

1const fc = require('fast-check');2const { schemeArb } = require('fast-check-monorepo');3const isScheme = (s) => {4};5fc.assert(6  fc.property(schemeArb(), (s) => {7    return isScheme(s);8  })9);10const fc = require('fast-check');11const { schemeArb } = require('fast-check-monorepo');12const isScheme = (s) => {13};14fc.assert(15  fc.property(schemeArb(), (s) => {16    return isScheme(s);17  })18);19const fc = require('fast-check');20const { schemeArb } = require('fast-check-monorepo');21const isScheme = (s) => {22};23fc.assert(24  fc.property(schemeArb(), (s) => {25    return isScheme(s);26  })27);28const fc = require('fast-check');29const { schemeArb } = require('fast-check-monorepo');30const isScheme = (s) => {31};32fc.assert(33  fc.property(schemeArb(), (s) => {34    return isScheme(s);35  })36);37const fc = require('fast-check');38const { schemeArb } = require('fast-check-monorepo');39const isScheme = (s) => {40};41fc.assert(42  fc.property(schemeArb(), (s) => {43    return isScheme(s);44  })45);

Using AI Code Generation

1const {schemeArb} = require("fast-check-monorepo")2const fc = require("fast-check")3const scheme = schemeArb().generate(fc.random(0))4console.log(scheme)5const {schemeArb} = require("fast-check-monorepo")6const fc = require("fast-check")7const scheme = schemeArb().generate(fc.random(0))8console.log(scheme)9const {schemeArb} = require("fast-check-monorepo")10const fc = require("fast-check")11const scheme = schemeArb().generate(fc.random(0))12console.log(scheme)13const {schemeArb} = require("fast-check-monorepo")14const fc = require("fast-check")15const scheme = schemeArb().generate(fc.random(0))16console.log(scheme)17const {schemeArb} = require("fast-check-monorepo")18const fc = require("fast-check")19const scheme = schemeArb().generate(fc.random(0))20console.log(scheme)21const {schemeArb} = require("fast-check-monorepo")22const fc = require("fast-check")23const scheme = schemeArb().generate(fc.random(0))24console.log(scheme)25const {schemeArb} = require("fast-check-monorepo")26const fc = require("fast-check")27const scheme = schemeArb().generate(fc.random(0))28console.log(scheme)29const {schemeArb} = require("fast-check-monorepo")30const fc = require("fast-check")31const scheme = schemeArb().generate(fc.random(0))32console.log(scheme)

Using AI Code Generation

1const fc = require('fast-check');2const schemeArb = require('fast-check-monorepo');3fc.assert(fc.property(arb, (url) => {4  console.log(url);5  return true;6}));

Using AI Code Generation

1const fc = require('fast-check');2const { schemeArb } = require('fast-check-monorepo');3const scheme = {4  properties: {5    id: { type: 'number' },6    name: { type: 'string' },7    address: {8      properties: {9        street: { type: 'string' },10        city: { type: 'string' },11        state: { type: 'string' },12        zip: { type: 'string' },13      },14    },15    phones: {16      items: {17        properties: {18          type: { type: 'string' },19          number: { type: 'string' },20        },21      },22    },23  },24};25const arb = schemeArb(scheme);26fc.assert(27  fc.property(arb, (obj) => {28    console.log(obj);29    return true;30  })31);

Using AI Code Generation

1var arb = require('fast-check').schemeArb;2var scheme = {3    items: {4    }5};6var schemeArb = arb(scheme);7var value = schemeArb.sampleOne();8console.log(value);

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