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test: add coverage for dgram _createSocketHandle()

This commit adds code coverage to _createSocketHandle(), which
the cluster module uses to create dgram sockets.

PR-URL: #11291
Reviewed-By: James M Snell <jasnell@gmail.com>
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cjihrig committed Feb 10, 2017
1 parent 4762791 commit a2fac322d5782a5b1802039ed477f8d4f0db2bdb
Showing with 39 additions and 0 deletions.
  1. +39 −0 test/parallel/test-dgram-create-socket-handle.js
@@ -0,0 +1,39 @@
'use strict';
const common = require('../common');
const assert = require('assert');
const dgram = require('dgram');
const UDP = process.binding('udp_wrap').UDP;
const _createSocketHandle = dgram._createSocketHandle;
// Throws if an "existing fd" is passed in.
assert.throws(() => {
_createSocketHandle(common.localhostIPv4, 0, 'udp4', 42);
}, /^AssertionError: false == true$/);
{
// Create a handle that is not bound.
const handle = _createSocketHandle(null, null, 'udp4');
assert(handle instanceof UDP);
assert.strictEqual(typeof handle.fd, 'number');
assert(handle.fd < 0);
}
{
// Create a bound handle.
const handle = _createSocketHandle(common.localhostIPv4, 0, 'udp4');
assert(handle instanceof UDP);
assert.strictEqual(typeof handle.fd, 'number');
if (!common.isWindows)
assert(handle.fd > 0);
}
{
// Return an error if binding fails.
const err = _createSocketHandle('localhost', 0, 'udp4');
assert.strictEqual(typeof err, 'number');
assert(err < 0);
}

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