46 lines
1.5 KiB
TypeScript
46 lines
1.5 KiB
TypeScript
import { expect } from 'chai';
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import { NotFoundError } from '../../src/error/NotFoundError';
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import { countOf, filterNil, mustFind } from '../../src/utils';
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import { describeLeaks, itLeaks } from '../helpers/async';
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describeLeaks('utils', async () => {
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describeLeaks('count list', async () => {
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itLeaks('should count a single item', async () => {
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expect(countOf(1)).to.equal(1, 'numbers');
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expect(countOf('')).to.equal(1, 'empty strings');
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expect(countOf('123')).to.equal(1, 'other strings');
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});
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itLeaks('should count an array of items', async () => {
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expect(countOf([1])).to.equal(1, 'single item list');
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expect(countOf([1, 2, 3])).to.equal(3, 'multi item list');
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});
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itLeaks('should count an unknown argument as 0', async () => {
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expect(countOf(undefined)).to.equal(0, 'undefined');
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// eslint-disable-next-line no-null/no-null
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expect(countOf(null)).to.equal(0, 'null');
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});
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});
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describeLeaks('filter nil', async () => {
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itLeaks('should remove nil items', async () => {
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// eslint-disable-next-line no-null/no-null
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expect(filterNil([1, undefined, 2, null, 3])).to.deep.equal([1, 2, 3]);
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});
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});
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describeLeaks('must find helper', async () => {
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itLeaks('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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itLeaks('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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});
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