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

PR-URL: nodejs#11248
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
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cjihrig authored and italoacasas committed Feb 14, 2017
1 parent 67d4dc0 commit 7ff32bf
Showing 1 changed file with 37 additions and 0 deletions.
37 changes: 37 additions & 0 deletions test/parallel/test-dgram-send-error.js
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'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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