How to use leftArb method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

either.ts

Source:either.ts Github

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...12function eitherArb<A, B>(13 arb1: jsv.Arbitrary<A>,14 arb2: jsv.Arbitrary<B>15): jsv.Arbitrary<E.Either<A, B>> {16 return jsv.oneof([leftArb(arb1), rightArb(arb2)]);17}18describe('Prelude Either', () => {19 describe('mapEither', () => {20 jsv.property('functor identity', eitherArb(jsv.nat, jsv.string), t =>21 deepEq(t, E.mapEither(t, id))22 );23 jsv.property('functor compose', eitherArb(jsv.nat, jsv.string), jsv.fn(jsv.nat),24 jsv.fn(jsv.nat), (t, f, g) =>25 deepEq(E.mapEither(t, x => f(g(x))), E.mapEither(E.mapEither(t, g), f))26 );27 it('Left value is untouched', () =>28 jsv.assert(29 jsv.forall(30 leftArb(jsv.json),31 jsv.fn(jsv.json),32 (a, f) => deepEq(E.mapEither(a, f), a)33 )34 )35 );36 });37 describe('bimapEither', () => {38 jsv.property('maps the first function over the left value', leftArb(jsv.nat), jsv.fn(jsv.nat),39 jsv.fn(jsv.nat), (t, f, g) => deepEq(E.bimapEither(t, f, g).value, f(t.value)));40 jsv.property('maps the second function over the right value', rightArb(jsv.nat), jsv.fn(jsv.nat),41 jsv.fn(jsv.nat), (t, f, g) => deepEq(E.bimapEither(t, g, g), E.mapEither(t, g)));42 });43 describe('lmapEither', () => {44 jsv.property('map the content of Left', leftArb(jsv.nat), jsv.fn(jsv.nat), (a, f) =>45 deepEq(E.lmapEither(a, f), E.left(f(a.value)))46 );47 jsv.property('Right value is untouched', rightArb(jsv.nat), jsv.fn(jsv.nat), (a, f) =>48 deepEq(E.lmapEither(a, f), a)49 );50 });51 describe('either', () => {52 jsv.property('returns the value of a Left after applying the first function arg',53 leftArb(jsv.nat), jsv.fn(jsv.nat), jsv.fn(jsv.nat), (t, f, g) =>54 deepEq(E.either(f, g, t), f(t.value))55 );56 jsv.property('returns the value of a Right after applying the second function arg',57 rightArb(jsv.nat), jsv.fn(jsv.nat), jsv.fn(jsv.nat), (t, f, g) =>58 deepEq(E.either(f, g, t), g(t.value))59 );60 });61 describe('altEither choose the right value', () => {62 assert.deepEqual(E.altEither(E.right(0), E.left(1)), E.right(0));63 assert.deepEqual(E.altEither(E.left(0), E.right(1)), E.right(1));64 assert.deepEqual(E.altEither(E.left(0), E.left(1)), E.left(1));65 });66 describe('inspect Either constructor', () => {67 jsv.property('isRight return false if given left', leftArb(jsv.nat), t => E.isRight(t) === false);68 jsv.property('isRight return true if passed right', rightArb(jsv.nat), t => E.isRight(t) === true);69 jsv.property('isLeft return false if given right', rightArb(jsv.nat), t => E.isLeft(t) === false);70 jsv.property('isLeft return true if passed left', leftArb(jsv.nat), t => E.isLeft(t) === true);71 });72 describe('chainEither', () => {73 it('does not call functions if the either is Left', () => {74 let ix = 0;75 function transform(a: string) {76 ix++;77 return E.right('fail');78 }79 let e = E.chainEither(E.left('error'), transform);80 assert.equal(ix, 0);81 assert.deepEqual(e, { tag: E.EitherType.LEFT, value: 'error' });82 });83 it('sequencing of `Either` values and functions that return Either', () => {84 function transform(a: string) {...

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Either.test.js

Source:Either.test.js Github

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1const laws = require ('fantasy-laws');2const jsc = require ('jsverify');3const show = require ('sanctuary-show');4const Z = require ('sanctuary-type-classes');5const { Left, Right } = require('./​Either')6const { head, isDefined } = require('../​../​helpers')7describe('Either', () => {8 describe('Right', () => {9 const fromNullable = value => isDefined(value) ? Right.of(value) : Left('It was null!')10 const value = m => m.reduce((_, el) => el, undefined)11 describe('reduce', () => {12 it('works like a reduce', () => {13 const result = Right.of(0).reduce((acc, el) => acc.concat(el), [])14 expect(result).toEqual([0])15 })16 it('is not lazy', () => {17 const fn = jest.fn().mockImplementation(x => x)18 Right.of(0).reduce(fn, undefined)19 expect(fn).toHaveBeenCalled()20 })21 })22 describe('releasing the value', () => {23 const fn = jest.fn().mockImplementation(x => x + 1)24 it('map', () => {25 const result = fromNullable(0)26 .map(x => fn(x))27 expect(value(result)).toBe(1)28 })29 it('chain', () => {30 const result = fromNullable(0)31 .chain(x => fromNullable(fn(x)))32 expect(value(result)).toBe(1)33 })34 it('ap', () => {35 const result = fromNullable(0)36 .ap(fromNullable(x => fn(x)))37 expect(value(result)).toBe(1)38 })39 })40 describe('it is lazy', () => {41 const fn = jest.fn().mockImplementation(x => x + 1)42 it('map is lazy', () => {43 fromNullable(0)44 .map(x => fn(x))45 expect(fn).not.toHaveBeenCalled()46 })47 it('chain is lazy', () => {48 fromNullable(0)49 .chain(x => fromNullable(fn(x)))50 expect(fn).not.toHaveBeenCalled()51 })52 it('ap is lazy', () => {53 fromNullable(0)54 .ap(fromNullable(x => fn(x)))55 expect(fn).not.toHaveBeenCalled()56 })57 })58 })59})60describe('fantasy-laws', () => {61 describe('Right', () => {62 const fArb = jsc.fn(jsc.number)63 const gArb = jsc.fn(jsc.number)64 const RightArb = jsc.number.smap(Right, head, show)65 describe('functor', () => {66 const { identity, composition } = laws.Functor(Z.equals)67 it('obeys identity', identity(RightArb))68 it('obeys composition', composition(RightArb, fArb, gArb))69 })70 describe('chain', () => {71 const fArb = jsc.fn(RightArb)72 const gArb = jsc.fn(RightArb)73 const { associativity } = laws.Chain(Z.equals)74 it('obeys associativity', associativity(RightArb, fArb, gArb))75 })76 describe('apply', () => {77 const RightFnArb = jsc.fn(jsc.number).smap(Right, head, show)78 const { composition } = laws.Apply(Z.equals)79 it('obeys composition', composition(RightFnArb, RightFnArb, RightArb))80 })81 })82 describe('Left', () => {83 const fArb = jsc.fn(jsc.number)84 const gArb = jsc.fn(jsc.number)85 const LeftArb = jsc.number.smap(Left, head, show)86 describe('functor', () => {87 const { identity, composition } = laws.Functor(Z.equals)88 it('obeys identity', identity(LeftArb))89 it('obeys composition', composition(LeftArb, fArb, gArb))90 })91 describe('chain', () => {92 const fArb = jsc.fn(LeftArb)93 const gArb = jsc.fn(LeftArb)94 const { associativity } = laws.Chain(Z.equals)95 it('obeys associativity', associativity(LeftArb, fArb, gArb))96 })97 describe('apply', () => {98 const LeftFnArb = jsc.fn(jsc.number).smap(Left, head, show)99 const { composition } = laws.Apply(Z.equals)100 it('obeys composition', composition(LeftFnArb, LeftFnArb, LeftArb))101 })102 })...

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Using AI Code Generation

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1const { leftArb } = require("fast-check-monorepo");2const left = leftArb(100).generate();3console.log(left);4const { rightArb } = require("fast-check-monorepo");5const right = rightArb(100).generate();6console.log(right);7const { bothArb } = require("fast-check-monorepo");8const both = bothArb(100).generate();9console.log(both);10const { eitherArb } = require("fast-check-monorepo");11const either = eitherArb(100).generate();12console.log(either);13const { optionArb } = require("fast-check-monorepo");14const option = optionArb(100).generate();15console.log(option);16const { taskArb } = require("fast-check-monorepo");17const task = taskArb(100).generate();18console.log(task);19const { taskEitherArb } = require("fast-check-monorepo");20const taskEither = taskEitherArb(100).generate();21console.log(taskEither);22const { ioArb } = require("fast-check-monorepo");23const io = ioArb(100).generate();24console.log(io);25const { ioEitherArb } = require("fast-check-monorepo");26const ioEither = ioEitherArb(100).generate();27console.log(ioEither);28const { readerArb } = require("fast-check-monorepo");

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Using AI Code Generation

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1const { leftArb } = require("fast-check-monorepo");2const { left } = require("fp-ts/​lib/​Either");3const { pipe } = require("fp-ts/​lib/​function");4const { showString } = require("fp-ts/​lib/​Show");5const { show } = require("fp-ts/​lib/​Either");6const leftArb = leftArb(showString);7const arb = pipe(8 arb.filter((e) => e._tag === "Left")9);10const { rightArb } = require("fast-check-monorepo");11const { right } = require("fp-ts/​lib/​Either");12const { pipe } = require("fp-ts/​lib/​function");13const { showString } = require("fp-ts/​lib/​Show");14const { show } = require("fp-ts/​lib/​Either");15const rightArb = rightArb(showString);16const arb = pipe(17 arb.filter((e) => e._tag === "Right")18);19const { eitherArb } = require("fast-check-monorepo");20const { left } = require("fp-ts/​lib/​Either");21const { pipe } = require("fp-ts/​lib/​function");22const { showString } = require("fp-ts/​lib/​Show");23const { show } = require("fp-ts/​lib/​Either");24const eitherArb = eitherArb(showString);25const arb = pipe(26 arb.filter((e) => e._tag === "Left")27);

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Using AI Code Generation

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1const leftArb = require('fast-check-monorepo/​src/​arbitrary/​leftArb.js');2const rightArb = require('fast-check-monorepo/​src/​arbitrary/​rightArb.js');3const leftArb = require('fast-check-monorepo/​src/​arbitrary/​leftArb.js');4const rightArb = require('fast-check-monorepo/​src/​arbitrary/​rightArb.js');5const leftArb = require('fast-check-monorepo/​src/​arbitrary/​leftArb.js');6const rightArb = require('fast-check-monorepo/​src/​arbitrary/​rightArb.js');7const leftArb = require('fast-check-monorepo/​src/​arbitrary/​leftArb.js');8const rightArb = require('fast-check-monorepo/​src/​arbitrary/​rightArb.js');9const leftArb = require('fast-check-monorepo/​src/​arbitrary/​leftArb.js');10const rightArb = require('fast-check-monorepo/​src/​arbitrary/​rightArb.js');11const leftArb = require('fast-check-monorepo/​src/​arbitrary/​leftArb.js');12const rightArb = require('fast-check-monorepo/​src/​arbitrary/​rightArb.js');13const leftArb = require('fast-check-monorepo/​src/​arbitrary/​leftArb.js');14const rightArb = require('fast

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Using AI Code Generation

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1import { leftArb } from 'fast-check-monorepo'2const arb = leftArb(2, 3, 4)3arb.generate()4arb.generate()5arb.generate()6arb.generate()7arb.generate()8arb.generate()9arb.generate()10arb.generate()11arb.generate()12import { rightArb } from 'fast-check-monorepo'13const arb = rightArb(2, 3, 4)14arb.generate()15arb.generate()16arb.generate()17arb.generate()18arb.generate()19arb.generate()20arb.generate()21arb.generate()22arb.generate()23import { optionArb } from 'fast-check-monorepo'24const arb = optionArb(2, 3, 4)25arb.generate()26arb.generate()

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Using AI Code Generation

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1const arb = leftArb(int8ArrayArb, int16ArrayArb);2function leftArb<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(3): Arbitrary<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>;4function rightArb<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(5): Arbitrary<[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]>;6function leftArb<T1, T2, T3, T4, T5, T6, T7, T8, T9>(

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Using AI Code Generation

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1const {leftArb} = require('fast-check-monorepo');2const {string} = require('fast-check');3const leftString = leftArb(string);4const leftStringArb = leftString({minLength: 1, maxLength: 100});5console.log(leftStringArb.generate());6const {rightArb} = require('fast-check-monorepo');7const {string} = require('fast-check');8const rightString = rightArb(string);9const rightStringArb = rightString({minLength: 1, maxLength: 100});10console.log(rightStringArb.generate());11const {leftOrRightArb} = require('fast-check-monorepo');12const {string} = require('fast-check');13const leftOrRightString = leftOrRightArb(string);14const leftOrRightStringArb = leftOrRightString({minLength: 1, maxLength: 100});15console.log(leftOrRightStringArb.generate());16const {leftOrRightArb} = require('fast-check-monorepo');17const {string} = require('fast-check');18const leftOrRightString = leftOrRightArb(string);

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