From a8d7ea2eec2fa2e2bbdea6d1fa4d34118b9a5842 Mon Sep 17 00:00:00 2001
From: Rich Trott <rtrott@gmail.com>
Date: Fri, 12 May 2017 17:01:13 -0700
Subject: [PATCH] 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.
---
 .../test-net-listen-shared-ports.js           | 26 ++++++++++---------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/test/sequential/test-net-listen-shared-ports.js b/test/sequential/test-net-listen-shared-ports.js
index c16285278afffe..282380ad271778 100644
--- a/test/sequential/test-net-listen-shared-ports.js
+++ b/test/sequential/test-net-listen-shared-ports.js
@@ -28,19 +28,19 @@ const net = require('net');
 if (cluster.isMaster) {
   const worker1 = cluster.fork();
 
-  worker1.on('message', function(msg) {
+  worker1.on('message', common.mustCall(function(msg) {
     assert.strictEqual(msg, 'success');
     const worker2 = cluster.fork();
 
-    worker2.on('message', function(msg) {
+    worker2.on('message', common.mustCall(function(msg) {
       assert.strictEqual(msg, 'server2:EADDRINUSE');
       worker1.kill();
       worker2.kill();
-    });
-  });
+    }));
+  }));
 } else {
-  const server1 = net.createServer(common.noop);
-  const server2 = net.createServer(common.noop);
+  const server1 = net.createServer(common.mustNotCall());
+  const server2 = 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');
+                   })
+    );
+  }));
 }