16 lines
382 B
JavaScript
16 lines
382 B
JavaScript
const expect = require('expect');
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const compose = require('./compose.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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