11 lines
332 B
JavaScript
11 lines
332 B
JavaScript
const expect = require('expect');
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const {unfold} = require('./_30s.js');
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test('unfold is a Function', () => {
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expect(unfold).toBeInstanceOf(Function);
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});
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var f = n => (n > 50 ? false : [-n, n + 10]);
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test('Works with a given function, producing an array', () => {
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expect(unfold(f, 10)).toEqual([-10, -20, -30, -40, -50]);
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});
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