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
15 lines
665 B
JavaScript
15 lines
665 B
JavaScript
const {mapObject} = require('./_30s.js');
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test('mapObject is a Function', () => {
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expect(mapObject).toBeInstanceOf(Function);
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});
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test('mapObject([1, 2, 3], a => a * a) returns { 1: 1, 2: 4, 3: 9 }', () => {
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expect(mapObject([1, 2, 3], a => a * a)).toEqual({ 1: 1, 2: 4, 3: 9 });
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});
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test('mapObject([1, 2, 3, 4], (a, b) => b - a) returns { 1: -1, 2: -1, 3: -1, 4: -1 }', () => {
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expect(mapObject([1, 2, 3, 4], (a, b) => b - a)).toEqual({ 1: -1, 2: -1, 3: -1, 4: -1 });
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});
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test('mapObject([1, 2, 3, 4], (a, b) => a - b) returns { 1: 1, 2: 1, 3: 1, 4: 1 }', () => {
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expect(mapObject([1, 2, 3, 4], (a, b) => a - b)).toEqual({ 1: 1, 2: 1, 3: 1, 4: 1 });
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});
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