node/test/sequential/test-net-better-error-messa...

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'use strict';
const common = require('../common');
const net = require('net');
const assert = require('assert');
const c = net.createConnection(common.PORT);
c.on('connect', common.mustNotCall());
c.on('error', common.mustCall(function(error) {
// Family autoselection might be skipped if only a single address is returned by DNS.
const failedAttempt = Array.isArray(error.errors) ? error.errors[0] : error;
assert.strictEqual(failedAttempt.code, 'ECONNREFUSED');
assert.strictEqual(failedAttempt.port, common.PORT);
assert.match(failedAttempt.address, /^(127\.0\.0\.1|::1)$/);
}));