15 lines
484 B
JavaScript
15 lines
484 B
JavaScript
const expect = require('expect');
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const {reject} = require('./_30s.js');
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test('reject is a Function', () => {
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expect(reject).toBeInstanceOf(Function);
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});
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const noEvens = reject(x => x % 2 === 0, [1, 2, 3, 4, 5]);
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test('Works with numbers', () => {
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expect(noEvens).toEqual([1, 3, 5]);
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});
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const fourLettersOrLess = reject(word => word.length > 4, ['Apple', 'Pear', 'Kiwi', 'Banana']);
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test('Works with strings', () => {
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expect(fourLettersOrLess).toEqual(['Pear', 'Kiwi']);
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});
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