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
15 lines
347 B
JavaScript
15 lines
347 B
JavaScript
const {compose} = require('./_30s.js');
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test('compose is a Function', () => {
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expect(compose).toBeInstanceOf(Function);
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});
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const add5 = x => x + 5;
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const multiply = (x, y) => x * y;
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const multiplyAndAdd5 = compose(
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add5,
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multiply
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);
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test('Performs right-to-left function composition', () => {
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expect(multiplyAndAdd5(5, 2)).toBe(15);
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});
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