47 lines
1.5 KiB
TypeScript
47 lines
1.5 KiB
TypeScript
/* eslint-disable no-magic-numbers */
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import { expect } from 'chai';
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import { NotFoundError } from '../../src/error/NotFoundError';
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import { defaultWhen, mustDefault, mustFind, removeNone } from '../../src/Maybe';
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describe('utils', async () => {
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describe('remove none', async () => {
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it('should remove items that are none', async () => {
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// eslint-disable-next-line no-null/no-null
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expect(removeNone([1, undefined, 2, null, 3])).to.deep.equal([1, 2, 3]);
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});
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});
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describe('must find helper', async () => {
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it('should return matching item', async () => {
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expect(mustFind([1, 2, 3], (val) => (val % 2) === 0)).to.equal(2);
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});
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it('should throw if no item matches', async () => {
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expect(() => {
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mustFind([1, 2, 3], (val) => val === 4);
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}).to.throw(NotFoundError);
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});
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});
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describe('default when', async () => {
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it('should return the first item when the condition is true', async () => {
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expect(defaultWhen(true, 1, 2)).to.equal(1);
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});
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it('should return the second item otherwise', async () => {
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expect(defaultWhen(false, 1, 2)).to.equal(2);
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});
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});
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describe('must default helper', async () => {
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/* eslint-disable no-null/no-null */
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it('should return the first existent value', async () => {
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expect(mustDefault(null, null, 3, null)).to.equal(3);
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expect(mustDefault(null, null, undefined, 'string')).to.equal('string');
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expect(mustDefault(null, undefined, [], null)).to.deep.equal([]);
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});
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/* eslint-enable no-null/no-null */
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});
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});
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