1'use strict'; 2 3require('../common'); 4const { strictEqual } = require('assert'); 5const { isatty } = require('tty'); 6 7strictEqual(isatty(0), true, 'stdin reported to not be a tty, but it is'); 8strictEqual(isatty(1), true, 'stdout reported to not be a tty, but it is'); 9strictEqual(isatty(2), true, 'stderr reported to not be a tty, but it is'); 10 11strictEqual(isatty(-1), false, '-1 reported to be a tty, but it is not'); 12strictEqual(isatty(55555), false, '55555 reported to be a tty, but it is not'); 13strictEqual(isatty(2 ** 31), false, '2^31 reported to be a tty, but it is not'); 14strictEqual(isatty(1.1), false, '1.1 reported to be a tty, but it is not'); 15strictEqual(isatty('1'), false, '\'1\' reported to be a tty, but it is not'); 16strictEqual(isatty({}), false, '{} reported to be a tty, but it is not'); 17strictEqual(isatty(() => {}), false, 18 '() => {} reported to be a tty, but it is not'); 19