test: track callback invocations

Use `common.mustCall()` and `common.mustNotCall()` to check that callbacks are invoked the expected number of times in test-net-listen-shared-ports. PR-URL: #13010 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Gibson Fahnestock <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Refael Ackermann <[email protected]>

Author: Trott

test/sequential/test-net-listen-shared-ports.js

@@ -28,19 +28,19 @@ const net = require('net');
 if(cluster.isMaster){
 constworker1=cluster.fork();
 
-worker1.on('message',function(msg){
+worker1.on('message',common.mustCall(function(msg){
 assert.strictEqual(msg,'success');
 constworker2=cluster.fork();
 
-worker2.on('message',function(msg){
+worker2.on('message',common.mustCall(function(msg){
 assert.strictEqual(msg,'server2:EADDRINUSE');
 worker1.kill();
 worker2.kill();
-});
-});
+}));
+}));
 }else{
-constserver1=net.createServer(common.noop);
-constserver2=net.createServer(common.noop);
+constserver1=net.createServer(common.mustNotCall());
+constserver2=net.createServer(common.mustNotCall());
 
 server1.on('error',function(err){
 // no errors expected
@@ -56,10 +56,12 @@ if (cluster.isMaster){
 host: 'localhost',
 port: common.PORT,
 exclusive: false
-},function(){
-server2.listen({port: common.PORT+1,exclusive: true},function(){
-// the first worker should succeed
-process.send('success');
-});
-});
+},common.mustCall(function(){
+server2.listen({port: common.PORT+1,exclusive: true},
+common.mustCall(function(){
+// the first worker should succeed
+process.send('success');
+})
+);
+}));
 }