83a6a6ea32
* chore: make aware eslint that we use jest By setting up the jest environment, we no longer need to declare the 'test' global in the configuration. * chore: don't need to import expect, it's a jest environment global * chore: don't need to import expect when creating undefined test
39 lines
1.0 KiB
JavaScript
39 lines
1.0 KiB
JavaScript
const {last} = require('./_30s.js');
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test('last is a Function', () => {
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expect(last).toBeInstanceOf(Function);
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});
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test('last({ a: 1234}) returns undefined', () => {
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expect(last({ a: 1234 }) === undefined).toBeTruthy();
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});
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test('last([1, 2, 3]) returns 3', () => {
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expect(last([1, 2, 3])).toBe(3);
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});
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test('last({ 0: false}) returns undefined', () => {
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expect(last({ 0: false })).toBe(undefined);
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});
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test('last(String) returns g', () => {
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expect(last('String')).toBe('g');
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});
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test('last(null) throws an Error', () => {
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expect(() => {
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last(null);
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}).toThrow();
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});
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test('last(undefined) throws an Error', () => {
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expect(() => {
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last(undefined);
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}).toThrow();
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});
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test('last() throws an Error', () => {
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expect(() => {
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last();
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}).toThrow();
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});
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let start = new Date().getTime();
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last([1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 1122, 32124, 23232]);
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let end = new Date().getTime();
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test('last([1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 1122, 32124, 23232]) takes less than 2s to run', () => {
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expect(end - start < 2000).toBeTruthy();
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});
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