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
17 lines
436 B
JavaScript
17 lines
436 B
JavaScript
const {nthArg} = require('./_30s.js');
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test('nthArg is a Function', () => {
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expect(nthArg).toBeInstanceOf(Function);
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});
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const third = nthArg(2);
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test('Returns the nth argument', () => {
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expect(third(1, 2, 3)).toBe(3);
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});
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test('Returns undefined if arguments too few', () => {
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expect(third(1, 2)).toBe(undefined);
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});
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const last = nthArg(-1);
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test('Works for negative values', () => {
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expect(last(1, 2, 3, 4, 5)).toBe(5);
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});
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