test: cover dgram handle send failures

This commit adds test coverage for the case where a dgram socket successfully binds, but the handle's send() function fails. PR-URL: #13158 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Luigi Pinca <[email protected]>

Author: cjihrig

test/parallel/test-dgram-send-error.js

@@ -35,3 +35,32 @@ getSocket((socket) =>{
 
 socket.send('foo',socket.address().port,'localhost',callback);
 });
+
+{
+constsocket=dgram.createSocket('udp4');
+
+socket.on('message',common.mustNotCall('Should not receive any messages.'));
+
+socket.bind(common.mustCall(()=>{
+constport=socket.address().port;
+consterrCode=process.binding('uv').UV_UNKNOWN;
+constcallback=common.mustCall((err)=>{
+socket.close();
+assert.strictEqual(err.code,'UNKNOWN');
+assert.strictEqual(err.errno,'UNKNOWN');
+assert.strictEqual(err.syscall,'send');
+assert.strictEqual(err.address,common.localhostIPv4);
+assert.strictEqual(err.port,port);
+assert.strictEqual(
+err.message,
+`${err.syscall}${err.code}${err.address}:${err.port}`
+);
+});
+
+socket._handle.send=function(){
+returnerrCode;
+};
+
+socket.send('foo',port,common.localhostIPv4,callback);
+}));
+}