19 lines
634 B
JavaScript
19 lines
634 B
JavaScript
const expect = require('expect');
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const reduceWhich = require('./reduceWhich.js');
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test('reduceWhich is a Function', () => {
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expect(reduceWhich).toBeInstanceOf(Function);
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});
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test('Returns the minimum of an array', () => {
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expect(reduceWhich([1, 3, 2])).toBe(1);
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});
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test('Returns the maximum of an array', () => {
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expect(reduceWhich([1, 3, 2], (a, b) => b - a)).toBe(3);
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});
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test('Returns the object with the minimum specified value in an array', () => {
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expect(reduceWhich(
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[{ name: 'Tom', age: 12 }, { name: 'Jack', age: 18 }, { name: 'Lucy', age: 9 }],
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(a, b) => a.age - b.age
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)).toEqual({name: "Lucy", age: 9});
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});
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