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
10 lines
298 B
JavaScript
10 lines
298 B
JavaScript
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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