19 lines
316 B
JavaScript
19 lines
316 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(
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(x) => x % 2 === 0,
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(x) => x * 2
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);
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t.true(doubleEvenNumbers(2) === 4);
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t.true(doubleEvenNumbers(1) === 1);
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