17 lines
467 B
JavaScript
17 lines
467 B
JavaScript
const expect = require('expect');
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const sample = require('./sample.js');
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test('sample is a Function', () => {
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expect(sample).toBeInstanceOf(Function);
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});
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const arr = [3,7,9,11];
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test('Returns a random element from the array', () => {
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expect(arr.includes(sample(arr))).toBeTruthy();
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});
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test('Works for single-element arrays', () => {
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expect(sample([1])).toBe(1);
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});
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test('Returns undefined for empty array', () => {
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expect(sample([])).toBe(undefined);
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});
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