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How to use valueArb method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

merge-weak-sets.js

Source:merge-weak-sets.js

1/**2 * Copyright 2021 Google LLC3 *4 * Licensed under the Apache License, Version 2.0 (the "License");5 * you may not use this file except in compliance with the License.6 * You may obtain a copy of the License at7 *8 *      http://www.apache.org/licenses/LICENSE-2.09 *10 * Unless required by applicable law or agreed to in writing, software11 * distributed under the License is distributed on an "AS IS" BASIS,12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.13 * See the License for the specific language governing permissions and14 * limitations under the License.15 */16import { testProp, fc } from 'ava-fast-check'17import isWeakSet from 'is-weakset'18import test from 'ava'19import { mergeWeakSets } from '../src/merge-weak-sets.js'20import toCommands from './helpers/to-commands.js'21const arraysArb = fc.array(fc.array(fc.object()))22testProp(`mergeWeakSets returns a WeakSet`, [arraysArb], (t, arrays) => {23  const weakSet = mergeWeakSets(...arrays.map(array => new WeakSet(array)))24  t.true(isWeakSet(weakSet))25})26testProp(27  `mergeWeakSets throws a type error when passed a non-WeakSet`,28  [29    fc30      .array(31        fc.oneof(32          fc.array(fc.object()).map(array => new WeakSet(array)),33          fc.anything()34        )35      )36      .filter(array => array.some(value => !isWeakSet(value)))37  ],38  (t, values) => {39    t.throws(40      () => {41        mergeWeakSets(...values)42      },43      {44        instanceOf: TypeError,45        message: `mergeWeakSets expects WeakSets`46      }47    )48  }49)50testProp(51  `mergeWeakSets returns a WeakSet with an add method that returns the same WeakSet`,52  [arraysArb, fc.array(fc.object(), { minLength: 1 })],53  (t, arrays, array) => {54    const weakSet = mergeWeakSets(...arrays.map(array => new WeakSet(array)))55    for (const value of array) {56      t.is(weakSet.add(value), weakSet)57    }58  }59)60const { addCommand, deleteCommand, hasCommand } = toCommands({61  add(t, model, real, value) {62    real.add(value)63    model.add(value)64  },65  delete(t, model, real, value) {66    t.is(real.delete(value), model.delete(value))67  },68  has(t, model, real, value) {69    t.is(real.has(value), model.has(value))70  }71})72testProp(73  `mergeWeakSets returns a WeakSet that behaves like a non-merged WeakSet containing the same values as the merged WeakSets`,74  [75    arraysArb76      .filter(77        arrays => arrays.length > 0 && arrays.some(array => array.length > 0)78      )79      .chain(arrays => {80        const valueArb = fc.oneof(81          fc.object(),82          fc.constantFrom(...arrays.flat())83        )84        return fc.tuple(85          fc.constant(arrays),86          fc.commands(87            [88              valueArb.map(addCommand),89              valueArb.map(deleteCommand),90              valueArb.map(hasCommand)91            ],92            { maxCommands: 1000 }93          )94        )95      })96  ],97  (t, [arrays, commands]) => {98    fc.modelRun(99      () => ({100        model: { t, model: new WeakSet(arrays.flat()) },101        real: mergeWeakSets(...arrays.map(array => new WeakSet(array)))102      }),103      commands104    )105    // When we only have `add` commands no assertions are run106    t.pass()107  }108)109test(`mergeWeakSets concrete example`, t => {110  const [a, b, c, d] = [[], {}, new Set(), new Map()]111  const weakSet1 = new WeakSet([a, b])112  const weakSet2 = new WeakSet([c])113  const mergedWeakSet = mergeWeakSets(weakSet1, weakSet2)114  t.true(mergedWeakSet.has(a))115  t.true(mergedWeakSet.has(b))116  t.true(mergedWeakSet.has(c))117  mergedWeakSet.delete(a)118  t.true(weakSet1.has(a))119  t.false(mergedWeakSet.has(a))120  mergedWeakSet.add(d)121  t.false(weakSet1.has(d))122  t.false(weakSet2.has(d))123  t.true(mergedWeakSet.has(d))...

state.test.js

Source:state.test.js

1var R = require('ramda');2var jsv = require('jsverify');3var types = require('./types')(function(sA, sB) {4  return R.equals(sA.run(0), sB.run(0));5});6var Identity = require('..').Identity;7var State = require('..').State;8var Tuple = require('..').Tuple;9function tupleArb(firstArb, secondArb) {10  return jsv.pair(firstArb, secondArb).smap(11    function (pair) { return Tuple(pair[0], pair[1]); },12    function (t) { return [Tuple.fst(t), Tuple.snd(t)]; },13    R.toString14  );15}16function stateArb(evalArb, execArb) {17  return jsv.fn(tupleArb(evalArb, execArb)).smap(18    function (f) { return State(R.compose(Identity, f)); },19    function (s) { return s.run; }20  );21}22function identityArb(valueArb) {23  return valueArb.smap(24    Identity,25    function (i) { return i.value; },26    R.toString27  );28}29var fnNatArb = jsv.fn(jsv.nat);30var stateNatArb = stateArb(jsv.nat, jsv.nat);31var stateFnNatArb = stateArb(fnNatArb, jsv.nat);32var stateConstructorArb = jsv.fn(identityArb(tupleArb(jsv.nat, jsv.nat)));33describe('State', function() {34  it('returns a Tuple of the state and result via state.run', function () {35    jsv.assert(jsv.forall(jsv.nat, stateConstructorArb, function (s, fn) {36      return R.equals(State(fn).run(s), fn(s).value);37    }));38  });39  it('returns the result via state.eval', function () {40    jsv.assert(jsv.forall(jsv.nat, stateConstructorArb, function (s, fn) {41      return R.equals(State(fn).eval(s), Tuple.fst(fn(s).value));42    }));43  });44  it('returns the state via state.exec', function () {45    jsv.assert(jsv.forall(jsv.nat, stateConstructorArb, function (s, fn) {46      return R.equals(State(fn).exec(s), Tuple.snd(fn(s).value));47    }));48  });49  it('retrieves the current state via the State.get instance', function () {50    jsv.assert(jsv.forall(jsv.nat, function (s) {51      return R.equals(State.get.eval(s), s);52    }));53  });54  it('retrieves a transformed state via State.gets', function () {55    jsv.assert(jsv.forall(jsv.nat, jsv.fn(jsv.nat), function (s, fn) {56      return R.equals(State.gets(fn).eval(s), fn(s));57    }));58  });59  it('stores the given state via State.put', function () {60    jsv.assert(jsv.forall(jsv.nat, jsv.nat, function (s1, s2) {61      return R.equals(State.put(s1).exec(s2), s1);62    }));63  });64  it('modifies the stored state via State.modify', function () {65    jsv.assert(jsv.forall(jsv.nat, jsv.fn(jsv.nat), function (s, fn) {66      return State.modify(fn).exec(s) === fn(s);67    }));68  });69  it('is a Functor', function () {70    var fTest = types.functor;71    jsv.assert(jsv.forall(stateNatArb, fTest.iface));72    jsv.assert(jsv.forall(stateNatArb, fTest.id));73    jsv.assert(jsv.forall(stateNatArb, fnNatArb, fnNatArb, fTest.compose));74  });75  it('is an Apply', function () {76    var aTest = types.apply;77    jsv.assert(jsv.forall(stateFnNatArb, stateFnNatArb, stateNatArb, aTest.compose));78    jsv.assert(jsv.forall(stateNatArb, aTest.iface));79  });80  it('is an Applicative', function () {81    var aTest = types.applicative;82    jsv.assert(jsv.forall(stateNatArb, aTest.iface));83    jsv.assert(jsv.forall(stateNatArb, stateNatArb, aTest.id));84    jsv.assert(jsv.forall(stateNatArb, fnNatArb, jsv.nat, aTest.homomorphic));85    jsv.assert(jsv.forall(stateNatArb, stateFnNatArb, jsv.nat, aTest.interchange));86  });87  it('is a Chain', function () {88    var cTest = types.chain;89    var fnEArb = jsv.fn(stateNatArb);90    jsv.assert(jsv.forall(stateNatArb, cTest.iface));91    jsv.assert(jsv.forall(stateNatArb, fnEArb, fnEArb, cTest.associative));92  });93  it('is a Monad', function () {94    jsv.assert(jsv.forall(stateNatArb, types.monad.iface));95  });...

hareactive.arbs.ts

Source:hareactive.arbs.ts

1import { Future, never, Stream, Time } from '@funkia/hareactive';2import { testFuture, testStreamFromArray } from '@funkia/hareactive/testing';3import * as fc from 'fast-check';4export type OccurringFutureArbConstraints = {5	minTime?: number;6	maxTime?: number;7};8export const occurringFutureArb = <T>(9	valueArb: fc.Arbitrary<T>,10	constraints: OccurringFutureArbConstraints = {}11): fc.Arbitrary<Future<T>> => {12	const time = fc.double({13		next: true,14		min: constraints.minTime,15		max: constraints.maxTime,16		noNaN: true,17	});18	return fc.tuple(time, valueArb).map((t) => testFuture(...t));19};20export type FutureArbConstraints = OccurringFutureArbConstraints & {21	// Probability to return never future is 1/freq. If false, future always occurs. Defaults to 5 (20%).22	freq?: number | false;23};24export const futureArb = <T>(25	value: fc.Arbitrary<T>,26	constraints: FutureArbConstraints = {}27): fc.Arbitrary<Future<T>> =>28	constraints.freq === false29		? occurringFutureArb(value, constraints)30		: fc.option(occurringFutureArb(value, constraints), {31				freq: constraints.freq,32				nil: never,33		  });34export type StreamArbConstraints<T> = {35	minEvents?: number;36	maxEvents?: number;37	minTime?: number;38	maxTime?: number;39	filterEvents?: ([t, v]: [Time, T]) => boolean;40};41export const streamArb = <T>(42	valueArb: fc.Arbitrary<T>,43	constraints: StreamArbConstraints<T> = {}44): fc.Arbitrary<Stream<T>> => {45	const eventArb = fc46		.tuple(47			fc.double({48				next: true,49				min: constraints.minTime,50				max: constraints.maxTime,51				noNaN: true,52			}),53			valueArb54		)55		.filter(constraints.filterEvents || (() => true));56	return fc57		.array(eventArb, {58			minLength: constraints.minEvents,59			maxLength: constraints.maxEvents,60		}) // Stream array must be sorted for correct semantics61		.map((s) => s.sort((a, b) => a[0] - b[0]))62		.map(testStreamFromArray);...

Using AI Code Generation

1const { valueArb } = require('fast-check-monorepo');2const { valueArb } = require('fast-check');3import { valueArb } from 'fast-check';4import { valueArb } from 'fast-check-monorepo';5import { valueArb } from 'fast-check-monorepo';6import { valueArb } from 'fast-check';7import { valueArb } from 'fast-check-monorepo';8import { valueArb } from 'fast-check';9import { valueArb } from 'fast-check-monorepo';10import { valueArb } from 'fast-check';11import { valueArb } from 'fast-check-monorepo';12import { valueArb } from 'fast-check';13import { valueArb } from 'fast-check-monorepo';14import { valueArb } from 'fast-check';15import { valueArb } from 'fast-check-monorepo';16import { valueArb } from 'fast-check';17import { valueArb } from 'fast-check-monorepo';18import { valueArb } from 'fast-check';19import { valueArb } from 'fast-check-monorepo';20import {

Using AI Code Generation

1const { valueArb } = require('fast-check-monorepo');2const { valueArb } = require('fast-check');3const { valueArb } = require('fast-check-monorepo');4const { valueArb } = require('fast-check');5const { valueArb } = require('fast-check-monorepo');6const { valueArb } = require('fast-check');7const { valueArb } = require('fast-check-monorepo');8const { valueArb } = require('fast-check');9const { valueArb } = require('fast-check-monorepo');10const { valueArb } = require('fast-check');11const { valueArb } = require('fast-check-monorepo');12const { valueArb } = require('fast-check');13const { valueArb } = require('fast-check-monorepo');14const { valueArb } = require('fast-check');15const { valueArb } = require('fast-check-monorepo');16const { valueArb } = require('fast-check');17const { valueArb } = require('fast-check-monorepo');18const { valueArb } = require('fast-check');19const { valueArb } = require('fast-check-mon

Using AI Code Generation

1const fc = require('fast-check');2const { valueArb } = require('fast-check-monorepo');3const arb = valueArb([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);4fc.assert(fc.property(arb, (v) => v >= 1 && v <= 10));5{6  "scripts": {7  },8  "dependencies": {9  }10}11{12  "compilerOptions": {13  },14}15{16  "compilerOptions": {17  },18    {19    }20}21{22  "compilerOptions": {

Using AI Code Generation

1import { valueArb } from 'fast-check-monorepo'2test('valueArb', () => {3  const arb = valueArb()4  const value = arb.generate(mrng(1))5  expect(value).not.toBeUndefined()6  expect(value).not.toBeNull()7})

Using AI Code Generation

1const {valueArb} = require('fast-check');2const {oneof} = require('fast-check');3const {string} = require('fast-check');4const {constant} = require('fast-check');5const {tuple} = require('fast-check');6const {record} = require('fast-check');7const {array} = require('fast-check');8const arb1 = oneof(string(), constant(1), tuple(string(), string()), record({a: string(), b: string()}), array(string()));9const arb2 = valueArb(arb1);10arb2.generate(mrng => mrng.nextInt());

Using AI Code Generation

1const fc = require('fast-check');2const { valueArb } = require('fast-check-monorepo');3const myArb = valueArb({ values: ['a', 'b', 'c'] });4fc.assert(fc.property(myArb, (value) => {5  console.log(value);6  return true;7}));

Using AI Code Generation

1import {valueArb} from 'fast-check-monorepo';2import {valueArb} from 'fast-check-monorepo/typings/index.d.ts';3import {valueArb} from 'fast-check-monorepo/typings/index';4import {valueArb} from 'fast-check-monorepo/typings/index.js';5import {valueArb} from 'fast-check-monorepo/typings/index.d.ts.js';6import {valueArb} from 'fast-check-monorepo/typings/index.d.ts/index.d.ts';7import {valueArb} from 'fast-check-monorepo/typings/index.d.ts/index';8import {valueArb} from 'fast-check-monorepo/typings/index.d.ts/index.js';9import {valueArb} from 'fast-check-monorepo/typings/index.d.ts/index.d.ts.js';10import {valueArb} from 'fast-check-monorepo';11import {valueArb} from 'fast-check-monorepo/typings/index.d.ts';12import {valueArb} from 'fast-check-monorepo/typings/index';13import {valueArb} from 'fast-check-monorepo/typings/index.js';14import {valueArb} from 'fast-check-monorepo/typings/index.d.ts.js';15import {valueArb} from 'fast-check-monorepo/typings/index.d.ts/index.d.ts';16import {valueArb} from 'fast-check-monorepo/typings/index.d.ts/index';17import {valueArb} from 'fast-check-monorepo/typings/index.d.ts/index.js';18import {valueArb} from 'fast-check-monorepo/typings/index.d.ts/index.d.ts.js';19import {valueArb} from 'fast-check-monorepo';20import {valueArb} from 'fast-check-monorepo/typings/index.d.ts';21import {valueArb} from 'fast-check-monorepo/typings/index';22import {valueArb} from 'fast-check-monorepo/typings/index.js';23import {valueArb} from 'fast-check-monorepo/typings/index.d.ts.js';24import {valueAr

Using AI Code Generation

1const { valueArb } = require('fast-check');2const arb = valueArb([1, 2, 3]);3arb.sample();4const { valueArb } = require('fast-check');5const arb = valueArb([1, 2, 3]);6arb.sample();7const { valueArb } = require('fast-check');8const arb = valueArb([1, 2, 3]);9arb.sample();10const { valueArb } = require('fast-check');11const arb = valueArb([1, 2, 3]);12arb.sample();13const { valueArb } = require('fast-check');14const arb = valueArb([1, 2, 3]);15arb.sample();16const { valueArb } = require('fast-check');17const arb = valueArb([1, 2, 3]);18arb.sample();19const { valueArb } = require('fast-check');20const arb = valueArb([1, 2, 3]);21arb.sample();22const { valueArb } = require('fast-check');23const arb = valueArb([1, 2, 3]);24arb.sample();25const { valueArb } = require('fast-check');26const arb = valueArb([1, 2, 3]);27arb.sample();28const { valueArb } = require('fast-check');29const arb = valueArb([1, 2, 3]);30arb.sample();31const { valueArb } = require('fast-check');32const arb = valueArb([1, 2, 3]);33arb.sample();34const { value

Using AI Code Generation

1import { valueArb } from 'fast-check-monorepo';2const arb = valueArb();3arb.generate();4import { valueArb } from 'fast-check-monorepo';5const arb = valueArb();6arb.generate();7- `{}`8[MIT](./LICENSE)

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