10 lines
283 B
JavaScript
10 lines
283 B
JavaScript
const expect = require('expect');
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const {unary} = require('./_30s.js');
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test('unary is a Function', () => {
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expect(unary).toBeInstanceOf(Function);
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});
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test('Discards arguments after the first one', () => {
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expect(['6', '8', '10'].map(unary(parseInt))).toEqual([6, 8, 10]);
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});
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