How to use leftArb method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

either.ts

Source:either.ts

...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) {...

Either.test.js

Source:Either.test.js

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  })...

Using AI Code Generation

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");

Using AI Code Generation

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);

Using AI Code Generation

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

Using AI Code Generation

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()

Using AI Code Generation

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>(

Using AI Code Generation

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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