43 lines
1.1 KiB
JavaScript
43 lines
1.1 KiB
JavaScript
const expect = require('expect');
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const {chunk} = require('./_30s.js');
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test('chunk is a Function', () => {
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expect(chunk).toBeInstanceOf(Function);
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});
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test('chunk([1, 2, 3, 4, 5], 2) returns [[1,2],[3,4],[5]] ', () => {
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expect(chunk([1, 2, 3, 4, 5], 2)).toEqual([[1, 2], [3, 4], [5]]);
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});
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test('chunk([]) returns []', () => {
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expect(chunk([])).toEqual([]);
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});
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test('chunk(123) returns []', () => {
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expect(chunk(123)).toEqual([]);
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});
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test('chunk({ a: 123}) returns []', () => {
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expect(chunk({ a: 123 })).toEqual([]);
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});
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test('chunk(string, 2) returns [ st, ri, ng ]', () => {
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expect(chunk('string', 2)).toEqual(['st', 'ri', 'ng']);
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});
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test('chunk() throws an error', () => {
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expect(() => {
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chunk();
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}).toThrow();
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});
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test('chunk(undefined) throws an error', () => {
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expect(() => {
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chunk(undefined);
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}).toThrow();
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});
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test('chunk(null) throws an error', () => {
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expect(() => {
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chunk(null);
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}).toThrow();
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});
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let start = new Date().getTime();
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chunk('This is a string', 2);
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let end = new Date().getTime();
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test('chunk(This is a string, 2) takes less than 2s to run', () => {
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expect(end - start < 2000).toBeTruthy();
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});
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