var common = require('../common'); var assert = require('assert'); var cares = process.binding('cares_wrap'); var dns = require('dns'); // Stub `getaddrinfo` to *always* error. cares.getaddrinfo = function() { return process.binding('uv').UV_ENOENT; }; assert.doesNotThrow(function() { var tickValue = 0; dns.lookup('example.com', function(error, result, addressType) { assert.equal(tickValue, 1); assert.equal(error.code, 'ENOENT'); }); // Make sure that the error callback is called // on next tick. tickValue = 1; });