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
16 lines
436 B
JavaScript
16 lines
436 B
JavaScript
const {sample} = require('./_30s.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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