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
20 lines
617 B
JavaScript
20 lines
617 B
JavaScript
const {reduceWhich} = require('./_30s.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(
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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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)
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).toEqual({ name: 'Lucy', age: 9 });
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});
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