14 lines
384 B
JavaScript
14 lines
384 B
JavaScript
const expect = require('expect');
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const when = require('./when.js');
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test('when is a Function', () => {
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expect(when).toBeInstanceOf(Function);
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});
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const doubleEvenNumbers = when(x => x % 2 === 0, x => x * 2);
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test('Returns the proper result', () => {
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expect(doubleEvenNumbers(2)).toBe(4);
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});
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test('Returns the proper result', () => {
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expect(doubleEvenNumbers(1)).toBe(1);
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});
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