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test: add coverage for dgram send() errors

This commit adds code coverage for emitted and callback errors
for dgram's Socket#send() method.

PR-URL: #11248
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
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cjihrig committed Feb 8, 2017
1 parent 90ab68b commit b32ae9e74dab25b905ef001638af7df77ca2d987
Showing with 37 additions and 0 deletions.
  1. +37 −0 test/parallel/test-dgram-send-error.js
@@ -0,0 +1,37 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const dgram = require('dgram');
+const mockError = new Error('mock DNS error');
+
+function getSocket(callback) {
+ const socket = dgram.createSocket('udp4');
+
+ socket.on('message', common.mustNotCall('Should not receive any messages.'));
+ socket.bind(common.mustCall(() => {
+ socket._handle.lookup = function(address, callback) {
+ process.nextTick(callback, mockError);
+ };
+
+ callback(socket);
+ }));
+ return socket;
+}
+
+getSocket((socket) => {
+ socket.on('error', common.mustCall((err) => {
+ socket.close();
+ assert.strictEqual(err, mockError);
+ }));
+
+ socket.send('foo', socket.address().port, 'localhost');
+});
+
+getSocket((socket) => {
+ const callback = common.mustCall((err) => {
+ socket.close();
+ assert.strictEqual(err, mockError);
+ });
+
+ socket.send('foo', socket.address().port, 'localhost', callback);
+});

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