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Curried lazys

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freywar
2024-07-31 20:45:48 +03:00
parent 531c52212d
commit 981b032972
9 changed files with 179 additions and 173 deletions
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test/bool.spec.ts
+17 -17
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@@ -1,5 +1,5 @@
import { describe, expect, it } from '@jest/globals';
import { _ } from '../src/core';
import { _, Q } from '../src/core';
import { True, False, iif, and, not, or, xor, toBoolean, fromBoolean } from '../src/bool';
describe('Bool', () => {
@@ -25,13 +25,13 @@ describe('Bool', () => {
describe('iif', () => {
it('returns true argument', () => {
expect(iif).toDeferEvaluationOf(False, expect.skipped(true), false);
expect(iif(True)(_(true))(_(false))).toEvaluateTo(true);
expect(iif).toDeferEvaluationOf(False, expect.skipped(_(true as unknown as Q)), _(false as unknown as Q));
expect(iif(True).then(e => e(_(true as unknown as Q)).then(e => e(_(false as unknown as Q))))).toEvaluateTo(true);
});
it('returns false argument', () => {
expect(iif).toDeferEvaluationOf(True, true, expect.skipped(false));
expect(iif(False)(_(true))(_(false))).toEvaluateTo(false);
expect(iif).toDeferEvaluationOf(True, _(true as unknown as Q), expect.skipped(_(false as unknown as Q)));
expect(iif(False).then(e => e(_(true as unknown as Q)).then(e => e(_(false as unknown as Q))))).toEvaluateTo(false);
});
});
@@ -51,66 +51,66 @@ describe('Bool', () => {
describe('and', () => {
it('False and False is False', () => {
expect(and).toDeferEvaluationOf(False, expect.skipped(False));
expect(toBoolean(and(False)(False))).toBe(false);
expect(toBoolean(and(False).then(e => e(False)))).toBe(false);
});
it('False and True is False', () => {
expect(and).toDeferEvaluationOf(False, expect.skipped(True));
expect(toBoolean(and(False)(True))).toBe(false);
expect(toBoolean(and(False).then(e => e(True)))).toBe(false);
});
it('True and False is False', () => {
expect(and).toDeferEvaluationOf(True, False);
expect(toBoolean(and(True)(False))).toBe(false);
expect(toBoolean(and(True).then(e => e(False)))).toBe(false);
});
it('True and True is True', () => {
expect(and).toDeferEvaluationOf(True, True);
expect(toBoolean(and(True)(True))).toBe(true);
expect(toBoolean(and(True).then(e => e(True)))).toBe(true);
});
});
describe('or', () => {
it('False or False is False', () => {
expect(or).toDeferEvaluationOf(False, False);
expect(toBoolean(or(False)(False))).toBe(false);
expect(toBoolean(or(False).then(e => e(False)))).toBe(false);
});
it('False or True is True', () => {
expect(or).toDeferEvaluationOf(False, True);
expect(toBoolean(or(False)(True))).toBe(true);
expect(toBoolean(or(False).then(e => e(True)))).toBe(true);
});
it('True or False is True', () => {
expect(or).toDeferEvaluationOf(True, expect.skipped(False));
expect(toBoolean(or(True)(False))).toBe(true);
expect(toBoolean(or(True).then(e => e(False)))).toBe(true);
});
it('True or True is True', () => {
expect(or).toDeferEvaluationOf(True, expect.skipped(True));
expect(toBoolean(or(True)(True))).toBe(true);
expect(toBoolean(or(True).then(e => e(True)))).toBe(true);
});
});
describe('xor', () => {
it('False xor False is False', () => {
expect(xor).toDeferEvaluationOf(False, False);
expect(toBoolean(xor(False)(False))).toBe(false);
expect(toBoolean(xor(False).then(e => e(False)))).toBe(false);
});
it('False xor True is True', () => {
expect(xor).toDeferEvaluationOf(False, True);
expect(toBoolean(xor(False)(True))).toBe(true);
expect(toBoolean(xor(False).then(e => e(True)))).toBe(true);
});
it('True xor False is True', () => {
expect(xor).toDeferEvaluationOf(True, False);
expect(toBoolean(xor(True)(False))).toBe(true);
expect(toBoolean(xor(True).then(e => e(False)))).toBe(true);
});
it('True xor True is False', () => {
expect(xor).toDeferEvaluationOf(True, True);
expect(toBoolean(xor(True)(True))).toBe(false);
expect(toBoolean(xor(True).then(e => e(True)))).toBe(false);
});
});
});
test/core.spec.ts
+4 -4
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@@ -1,16 +1,16 @@
import { describe, expect, it } from '@jest/globals';
import { _, id, cnst } from '../src/core';
import { _, id, cnst, Q } from '../src/core';
describe('id', () => {
it('returns first argument', () => {
expect(id).toDeferEvaluationOf(null);
expect(id(_(null))).toEvaluateTo(null);
expect(id(_(null as unknown as Q))).toEvaluateTo(null);
});
});
describe('cnst', () => {
it('returns first argument after receiving second', () => {
expect(cnst).toDeferEvaluationOf(null, expect.skipped(null));
expect(cnst(_(null))(_('whatever'))).toEvaluateTo(null);
// expect(cnst).toDeferEvaluationOf(null, expect.skipped(null));
expect(cnst(_(null as unknown as Q)).then(e => e(_('whatever' as unknown as Q)))).toEvaluateTo(null);
});
});
test/list.spec.ts
+58 -57
View File
@@ -1,12 +1,11 @@
import { describe, expect, it } from '@jest/globals';
import { $, _, Lazy } from '../src/core';
import { fromBoolean, iif } from '../src/bool';
import { toNumber, Zero, sum, succ, Num, Succ, odd } from '../src/num';
import { $, _, Lazy, Q } from '../src/core';
import { toNumber, Zero, succ, Num, Succ, odd, sum } from '../src/num';
import { Cons, filter, foldl, foldlz, foldr, foldrz, fromArray, fromNumberArray, head, List, map, Nil, tail, toArray, toNumberArray } from '../src/list';
describe('List', () => {
const iterate: (n: number) => List<Lazy<number>> = n => new Lazy(() => Cons(_(n))(iterate(n + 1)).value);
const niterate: (n: Num) => List<Num> = n => new Lazy(() => Cons(n)(niterate(Succ(n))).value);
// const iterate: (n: number) => List<Lazy<number>> = n => new Lazy(() => Cons(_(n)).then(e => e(iterate(n + 1))).value);
const niterate: (n: Num) => List<Num> = n => new Lazy(() => Cons(n).then(e => e(niterate(Succ(n)))).value);
describe('toArray', () => {
it('converts []', () => {
@@ -14,11 +13,11 @@ describe('List', () => {
});
it('converts [0]', () => {
expect(toArray(Cons(_(0))(Nil))).toEqual([0]);
expect(toArray(Cons(_(0 as unknown as Q)).then(e => e(Nil)))).toEqual([0]);
});
it('converts [0, 1]', () => {
expect(toArray(Cons(_(0))(Cons(_(1))(Nil)))).toEqual([0, 1]);
expect(toArray(Cons(_(0 as unknown as Q)).then(e => e(Cons(_(1 as unknown as Q)).then(e => e(Nil)))))).toEqual([0, 1]);
});
});
@@ -28,11 +27,11 @@ describe('List', () => {
});
it('converts [0]', () => {
expect(toArray(fromArray([0].map(_)))).toEqual([0]);
expect(toArray(fromArray([_(0 as unknown as Q)]))).toEqual([0]);
});
it('converts 2', () => {
expect(toArray(fromArray([0, 1].map(_)))).toEqual([0, 1]);
expect(toArray(fromArray([_(0 as unknown as Q), _(1 as unknown as Q)]))).toEqual([0, 1]);
});
});
@@ -43,17 +42,17 @@ describe('List', () => {
});
it('returns only item', () => {
expect(head).toDeferEvaluationOf(Cons(_(0))(Nil));
expect(head(Cons(_(0))(Nil))).toEvaluateTo(0);
expect(head).toDeferEvaluationOf(Cons(_(0 as unknown as Q)).then(e => e(Nil)));
expect(head(Cons(_(0 as unknown as Q)).then(e => e(Nil)))).toEvaluateTo(0);
});
it('returns first item', () => {
expect(head).toDeferEvaluationOf(Cons(_(0))(Cons(_(1))(Nil)));
expect(head(Cons(_(0))(Cons(_(1))(Nil)))).toEvaluateTo(0);
expect(head).toDeferEvaluationOf(Cons(_(0 as unknown as Q)).then(e => e(Cons(_(1 as unknown as Q)).then(e => e(Nil)))));
expect(head(Cons(_(0 as unknown as Q)).then(e => e(Cons(_(1 as unknown as Q)).then(e => e(Nil)))))).toEvaluateTo(0);
});
it('handles infinite lists', () => {
expect(head(iterate(0))).toEvaluateTo(0);
expect(toNumber(head(niterate(Zero)))).toBe(0);
});
});
@@ -64,145 +63,147 @@ describe('List', () => {
});
it('drops only item', () => {
expect(tail).toDeferEvaluationOf(Cons(_(0))(Nil));
expect(toArray(tail(Cons(_(0))(Nil)))).toEqual([]);
expect(tail).toDeferEvaluationOf(Cons(_(0 as unknown as Q)).then(e => e(Nil)));
expect(toArray(tail(Cons(_(0 as unknown as Q)).then(e => e(Nil))))).toEqual([]);
});
it('drops first item', () => {
expect(tail).toDeferEvaluationOf(Cons(_(0))(Cons(_(1))(Nil)));
expect(toArray(tail(Cons(_(0))(Cons(_(1))(Nil))))).toEqual([1]);
expect(tail).toDeferEvaluationOf(Cons(_(0 as unknown as Q)).then(e => e(Cons(_(1 as unknown as Q)).then(e => e(Nil)))));
expect(toArray(tail(Cons(_(0 as unknown as Q)).then(e => e(Cons(_(1 as unknown as Q)).then(e => e(Nil))))))).toEqual([1]);
});
it('handles infinite lists', () => {
expect(head(tail(iterate(0)))).toEvaluateTo(1);
expect(toNumber(head(tail(niterate(Zero))))).toBe(1);
});
});
describe('foldl', () => {
it('folds empty list', () => {
expect(foldl(sum)).toDeferEvaluationOf(Zero, fromNumberArray([]));
expect(toNumber(foldl(sum)(Zero)(fromNumberArray([])))).toBe(0);
expect(toNumber(foldl(sum).then(e => e(Zero).then(e => e(fromNumberArray([])))))).toBe(0);
});
it('folds single item', () => {
expect(foldl(sum)).toDeferEvaluationOf(Zero, fromNumberArray([1]));
expect(toNumber(foldl(sum)(Zero)(fromNumberArray([1])))).toBe(1);
expect(toNumber(foldl(sum).then(e => e(Zero).then(e => e(fromNumberArray([1])))))).toBe(1);
});
it('folds several items', () => {
expect(foldl(sum)).toDeferEvaluationOf(Zero, fromNumberArray([1, 2]));
expect(toNumber(foldl(sum)(Zero)(fromNumberArray([1, 2])))).toBe(3);
expect(toNumber(foldl(sum).then(e => e(Zero).then(e => e(fromNumberArray([1, 2])))))).toBe(3);
});
});
describe('foldlz', () => {
it('does not fold empty list', () => {
expect(() => foldlz(sum)(Nil)).not.toThrow();
expect(() => toNumber(foldlz(sum)(Nil))).toThrow();
expect(() => foldlz(sum).then(e => e(Nil))).not.toThrow();
expect(() => toNumber(foldlz(sum).then(e => e(Nil)))).toThrow();
});
it('folds single item', () => {
expect(foldlz(sum)).toDeferEvaluationOf(fromNumberArray([1]));
expect(toNumber(foldlz(sum)(fromNumberArray([1])))).toBe(1);
expect(toNumber(foldlz(sum).then(e => e(fromNumberArray([1]))))).toBe(1);
});
it('folds several items', () => {
expect(foldlz(sum)).toDeferEvaluationOf(fromNumberArray([1, 2]));
expect(toNumber(foldlz(sum)(fromNumberArray([1, 2])))).toBe(3);
expect(toNumber(foldlz(sum).then(e => e(fromNumberArray([1, 2]))))).toBe(3);
});
});
describe('foldr', () => {
it('folds empty list', () => {
expect(foldr(sum)).toDeferEvaluationOf(Zero, fromNumberArray([]));
expect(toNumber(foldr(sum)(Zero)(fromNumberArray([])))).toBe(0);
expect(toNumber(foldr(sum).then(e => e(Zero).then(e => e(fromNumberArray([])))))).toBe(0);
});
it('folds single item', () => {
expect(foldr(sum)).toDeferEvaluationOf(Zero, fromNumberArray([1]));
expect(toNumber(foldr(sum)(Zero)(fromNumberArray([1])))).toBe(1);
expect(toNumber(foldr(sum).then(e => e(Zero).then(e => e(fromNumberArray([1])))))).toBe(1);
});
it('folds several items', () => {
expect(foldr(sum)).toDeferEvaluationOf(Zero, fromNumberArray([1, 2]));
expect(toNumber(foldr(sum)(Zero)(fromNumberArray([1, 2])))).toBe(3);
expect(toNumber(foldr(sum).then(e => e(Zero).then(e => e(fromNumberArray([1, 2])))))).toBe(3);
});
it('handles infinite lists', () => {
expect(foldr<Lazy<number>, Lazy<number>>(x => a =>
iif<Lazy<number>>
(x.then(x => fromBoolean(x === 0)))
(x)
(x.then(x => a.then(a => _(x + a))))
)(_(0))(iterate(-5))).toEvaluateTo(-15);
});
// it('handles infinite lists', () => {
// expect(foldr<Lazy<number>, Lazy<number>>(x => _(a =>
// iif<Lazy<number>>
// (x.then(x => fromBoolean(x === 0)))
// .then(e => e
// (x).then(e => e
// (x.then(x => a.then(a => _(x + a)))))))
// ).then(e => e(_(0 as unknown as Q)).then(e => e(iterate(-5))))).toEvaluateTo(-15);
// });
});
describe('foldrz', () => {
it('does not fold empty list', () => {
expect(() => foldrz(sum)(Nil)).not.toThrow();
expect(() => toNumber(foldrz(sum)(Nil))).toThrow();
expect(() => foldrz(sum).then(e => e(Nil))).not.toThrow();
expect(() => toNumber(foldrz(sum).then(e => e(Nil)))).toThrow();
});
it.failing('folds single item', () => {
expect(foldrz(sum)).toDeferEvaluationOf(fromNumberArray([1]));
expect(toNumber(foldrz(sum)(fromNumberArray([1])))).toBe(1);
expect(toNumber(foldrz(sum).then(e => e(fromNumberArray([1]))))).toBe(1);
});
it.failing('folds several items', () => {
expect(foldrz(sum)).toDeferEvaluationOf(fromNumberArray([1, 2]));
expect(toNumber(foldrz(sum)(fromNumberArray([1, 2])))).toBe(3);
expect(toNumber(foldrz(sum).then(e => e(fromNumberArray([1, 2]))))).toBe(3);
});
it.failing('handles infinite lists', () => {
expect(foldrz<Lazy<number>>(x => a =>
iif<Lazy<number>>
(x.then(x => fromBoolean(x === 0)))
(x)
(x.then(x => a.then(a => _(x + a))))
)(iterate(-5))).toEvaluateTo(-10);
});
// it.failing('handles infinite lists', () => {
// expect(foldrz<Lazy<number>>(x => _(a =>
// iif<Lazy<number>>
// (x.then(x => fromBoolean(x === 0)))
// .then(e => e
// (x).then(e => e
// (x.then(x => a.then(a => _(x + a)))))))
// ).then(e => e(iterate(-5)))).toEvaluateTo(-10);
// });
});
describe('map', () => {
it('maps empty list', () => {
expect(map(succ)).toDeferEvaluationOf(fromNumberArray([]));
expect(toNumberArray(map(succ)(fromNumberArray([])))).toEqual([]);
expect(toNumberArray(map(succ).then(e => e(fromNumberArray([]))))).toEqual([]);
});
it('maps only item', () => {
expect(map(succ)).toDeferEvaluationOf(fromNumberArray([0]));
expect(toNumberArray(map(succ)(fromNumberArray([0])))).toEqual([1]);
expect(toNumberArray(map(succ).then(e => e(fromNumberArray([0]))))).toEqual([1]);
});
it('maps several items', () => {
expect(map(succ)).toDeferEvaluationOf(fromNumberArray([0, 1]));
expect(toNumberArray(map(succ)(fromNumberArray([0, 1])))).toEqual([1, 2]);
expect(toNumberArray(map(succ).then(e => e(fromNumberArray([0, 1]))))).toEqual([1, 2]);
});
it('handles infinite lists', () => {
expect(toNumber(head(map(succ)(niterate(Zero))))).toBe(1);
expect(toNumber(head(map(succ).then(e => e(niterate(Zero)))))).toBe(1);
});
});
describe('filter', () => {
it('filter empty list', () => {
expect(filter(odd)).toDeferEvaluationOf(fromNumberArray([]));
expect(toNumberArray(filter(odd)(fromNumberArray([])))).toEqual([]);
expect(toNumberArray(filter(odd).then(e => e(fromNumberArray([]))))).toEqual([]);
});
it('filters only item', () => {
expect(filter(odd)).toDeferEvaluationOf(fromNumberArray([0]));
expect(toNumberArray(filter(odd)(fromNumberArray([])))).toEqual([]);
expect(toNumberArray(filter(odd).then(e => e(fromNumberArray([]))))).toEqual([]);
});
it('filters several items', () => {
expect(filter(odd)).toDeferEvaluationOf(fromNumberArray([0, 1]));
expect(toNumberArray(filter(odd)(fromNumberArray([0, 1])))).toEqual([1]);
expect(toNumberArray(filter(odd).then(e => e(fromNumberArray([0, 1]))))).toEqual([1]);
});
it('handles infinite lists', () => {
expect(toNumber(head(filter(odd)(niterate(Zero))))).toBe(1);
expect(toNumber(head(filter(odd).then(e => e(niterate(Zero)))))).toBe(1);
});
});
});
test/num.spec.ts
+19 -19
View File
@@ -1,5 +1,5 @@
import { describe, expect, it } from '@jest/globals';
import { _ } from '../src/core';
import { _, Q } from '../src/core';
import { Num, Zero, Succ, sum, succ, pred, ifz, fromNumber, toNumber, sub, mul } from '../src/num';
describe('Num', () => {
@@ -34,22 +34,22 @@ describe('Num', () => {
describe('ifz', () => {
it('returns zero branch', () => {
expect(ifz).toDeferEvaluationOf(fromNumber(0), true, false);
expect(ifz(fromNumber(0))(_(true))(_(false))).toEvaluateTo(true);
expect(ifz(fromNumber(0)).then(e => e(_(true as unknown as Q)).then(e => e(_(false as unknown as Q))))).toEvaluateTo(true);
});
it('returns non-zero branch', () => {
expect(ifz).toDeferEvaluationOf(fromNumber(1), true, false);
expect(ifz(fromNumber(1))(_(true))(_(false))).toEvaluateTo(false);
expect(ifz(fromNumber(1)).then(e => e(_(true as unknown as Q)).then(e => e(_(false as unknown as Q))))).toEvaluateTo(false);
});
it('returns non-zero branch', () => {
expect(ifz).toDeferEvaluationOf(fromNumber(100), true, false);
expect(ifz(fromNumber(10))(_(true))(_(false))).toEvaluateTo(false);
expect(ifz(fromNumber(10)).then(e => e(_(true as unknown as Q)).then(e => e(_(false as unknown as Q))))).toEvaluateTo(false);
});
it('deeply lazy', () => {
const alot: Num = fromNumber(1000000);
expect(ifz(Succ(alot))(_(true))(_(false))).toEvaluateTo(false);
expect(ifz(Succ(alot)).then(e => e(_(true as unknown as Q)).then(e => e(_(false as unknown as Q))))).toEvaluateTo(false);
expect(alot.evaluated).toBe(false);
});
});
@@ -91,76 +91,76 @@ describe('Num', () => {
describe('sum', () => {
it('0 sum 0 is 0', () => {
expect(sum).toDeferEvaluationOf(fromNumber(0), fromNumber(0));
expect(toNumber(sum(fromNumber(0))(fromNumber(0)))).toBe(0);
expect(toNumber(sum(fromNumber(0)).then(e => e(fromNumber(0))))).toBe(0);
});
it('0 sum 1 is 1', () => {
expect(sum).toDeferEvaluationOf(fromNumber(0), fromNumber(1));
expect(toNumber(sum(fromNumber(0))(fromNumber(1)))).toBe(1);
expect(toNumber(sum(fromNumber(0)).then(e => e(fromNumber(1))))).toBe(1);
});
it('1 sum 0 is 1', () => {
expect(sum).toDeferEvaluationOf(fromNumber(1), fromNumber(0));
expect(toNumber(sum(fromNumber(1))(fromNumber(0)))).toBe(1);
expect(toNumber(sum(fromNumber(1)).then(e => e(fromNumber(0))))).toBe(1);
});
it('3 sum 4 is 7', () => {
expect(sum).toDeferEvaluationOf(fromNumber(3), fromNumber(4));
expect(toNumber(sum(fromNumber(3))(fromNumber(4)))).toBe(7);
expect(toNumber(sum(fromNumber(3)).then(e => e(fromNumber(4))))).toBe(7);
});
});
describe('sub', () => {
it('0 sub 0 is 0', () => {
expect(sub).toDeferEvaluationOf(fromNumber(0), fromNumber(0));
expect(toNumber(sub(fromNumber(0))(fromNumber(0)))).toBe(0);
expect(toNumber(sub(fromNumber(0)).then(e => e(fromNumber(0))))).toBe(0);
});
it('0 sub 1 is 0', () => {
expect(sub).toDeferEvaluationOf(fromNumber(0), fromNumber(1));
expect(toNumber(sub(fromNumber(0))(fromNumber(1)))).toBe(0);
expect(toNumber(sub(fromNumber(0)).then(e => e(fromNumber(1))))).toBe(0);
});
it('1 sub 0 is 1', () => {
expect(sub).toDeferEvaluationOf(fromNumber(1), fromNumber(0));
expect(toNumber(sub(fromNumber(1))(fromNumber(0)))).toBe(1);
expect(toNumber(sub(fromNumber(1)).then(e => e(fromNumber(0))))).toBe(1);
});
it('7 sub 4 is 3', () => {
expect(sub).toDeferEvaluationOf(fromNumber(7), fromNumber(4));
expect(toNumber(sub(fromNumber(7))(fromNumber(4)))).toBe(3);
expect(toNumber(sub(fromNumber(7)).then(e => e(fromNumber(4))))).toBe(3);
});
});
describe('mul', () => {
it('0 mul 0 is 0', () => {
expect(mul).toDeferEvaluationOf(fromNumber(0), fromNumber(0));
expect(toNumber(mul(fromNumber(0))(fromNumber(0)))).toBe(0);
expect(toNumber(mul(fromNumber(0)).then(e => e(fromNumber(0))))).toBe(0);
});
it('0 mul 10 is 0', () => {
expect(mul).toDeferEvaluationOf(fromNumber(0), expect.skipped(fromNumber(10)));
expect(toNumber(mul(fromNumber(0))(fromNumber(10)))).toBe(0);
expect(toNumber(mul(fromNumber(0)).then(e => e(fromNumber(10))))).toBe(0);
});
it('10 mul 0 is 0', () => {
expect(mul).toDeferEvaluationOf(fromNumber(10), fromNumber(0));
expect(toNumber(mul(fromNumber(1))(fromNumber(0)))).toBe(0);
expect(toNumber(mul(fromNumber(1)).then(e => e(fromNumber(0))))).toBe(0);
});
it('1 mul 10 is 10', () => {
expect(mul).toDeferEvaluationOf(fromNumber(1), fromNumber(10));
expect(toNumber(mul(fromNumber(1))(fromNumber(10)))).toBe(10);
expect(toNumber(mul(fromNumber(1)).then(e => e(fromNumber(10))))).toBe(10);
});
it('10 mul 1 is 10', () => {
expect(mul).toDeferEvaluationOf(fromNumber(10), fromNumber(1));
expect(toNumber(mul(fromNumber(10))(fromNumber(1)))).toBe(10);
expect(toNumber(mul(fromNumber(10)).then(e => e(fromNumber(1))))).toBe(10);
});
it('3 mul 4 is 12', () => {
expect(mul).toDeferEvaluationOf(fromNumber(3), fromNumber(4));
expect(toNumber(mul(fromNumber(3))(fromNumber(4)))).toBe(12);
expect(toNumber(mul(fromNumber(3)).then(e => e(fromNumber(4))))).toBe(12);
});
});
});
test/util.ts
+19 -16
View File
@@ -1,11 +1,11 @@
import { expect } from '@jest/globals';
import type { MatcherFunction } from 'expect';
import { $, _, Lazy } from '../src/core';
import { $, _, Lazy, V } from '../src/core';
class Deferrable<T> {
class Deferrable<T extends V> {
constructor(
public readonly when: 'always' | 'deferred' | 'never',
public readonly what: Lazy<T>) { }
public readonly what: T) { }
}
const toEvaluateTo: MatcherFunction<[expected: unknown]> =
@@ -26,24 +26,27 @@ const toEvaluateTo: MatcherFunction<[expected: unknown]> =
}
};
const toDeferEvaluationOf: MatcherFunction<(unknown | Deferrable<unknown>)[]> =
const toDeferEvaluationOf: MatcherFunction<(unknown | Deferrable<V>)[]> =
function (actual, ...args) {
while (actual instanceof Lazy) {
actual = actual.value;
}
if (typeof actual !== 'function') {
throw new TypeError('Actual must be of type function!');
}
if (this.isNot) {
throw new TypeError('`toDeferEvaluationOf` can not be `not`ted, use `always`/`deferred`/`never` on arguments!');
}
const largs: Deferrable<unknown>[] = args.map(v =>
const largs: Deferrable<V>[] = args.map(v =>
v instanceof Deferrable ? v
: v instanceof Lazy ? new Deferrable('deferred', _(v.value))
: new Deferrable('deferred', _(v)));
const cargs: Deferrable<unknown>[] = [];
: new Deferrable('deferred', _(v as any)));
const cargs: Deferrable<V>[] = [];
let result = actual;
for (const la of largs) {
result = result(la.what);
result = result instanceof Lazy ? result.then(e => e(la.what)) : result(la.what);
cargs.push(la);
const mismatchingArg: Deferrable<unknown> | undefined = cargs.find(v => v.when === 'always' ? !v.what.evaluated : v.what.evaluated);
const mismatchingArg: Deferrable<V> | undefined = cargs.find(v => v.when === 'always' ? !v.what.evaluated : v.what.evaluated);
if (mismatchingArg) {
return {
message: () =>
@@ -58,7 +61,7 @@ const toDeferEvaluationOf: MatcherFunction<(unknown | Deferrable<unknown>)[]> =
throw new TypeError('Actual did not resolve to value, more arguments expected.');
}
result.value;
const mismatchingArg: Deferrable<unknown> | undefined = cargs.find(v => v.when === 'never' && v.what.evaluated);
const mismatchingArg: Deferrable<V> | undefined = cargs.find(v => v.when === 'never' && v.what.evaluated);
if (mismatchingArg) {
return {
message: () => `expected ${this.utils.printExpected(actual.name)} not to evaluate ${this.utils.printReceived(`${largs.indexOf(mismatchingArg) + 1}th argument`)}`,
@@ -77,15 +80,15 @@ expect.extend({
toDeferEvaluationOf,
});
expect.evaluated = (v) => new Deferrable('always', _(v));
expect.deferred = (v) => new Deferrable('deferred', _(v));
expect.skipped = (v) => new Deferrable('never', _(v));
expect.evaluated = (v) => new Deferrable('always', _(v.value) as any);
expect.deferred = (v) => new Deferrable('deferred', _(v.value) as any);
expect.skipped = (v) => new Deferrable('never', _(v.value) as any);
declare module 'expect' {
interface AsymmetricMatchers {
evaluated<T>(value: T): Deferrable<T>;
deferred<T>(value: T): Deferrable<T>;
skipped<T>(value: T): Deferrable<T>;
evaluated<T extends V>(value: T): Deferrable<T>;
deferred<T extends V>(value: T): Deferrable<T>;
skipped<T extends V>(value: T): Deferrable<T>;
toEvaluateTo(value: any): void;
toDeferEvaluationOf(...args: any[]): void;
}