net: return this from getConnections()

PR-URL: https://github.com/nodejs/node/pull/13553
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

doc/api/net.md

@@ -162,6 +162,8 @@ connections use asynchronous `server.getConnections` instead.
 added: v0.9.7
 -->
 
+* Returns {net.Server}
+
 Asynchronously get the number of concurrent connections on the server. Works
 when sockets were sent to forks.
 

lib/net.js

@@ -1550,7 +1550,8 @@ Server.prototype.getConnections = function(cb) {
   }
 
   if (!this._usingSlaves) {
-    return end(null, this._connections);
+    end(null, this._connections);
+    return this;
   }
 
   // Poll slaves
@@ -1570,6 +1571,8 @@ Server.prototype.getConnections = function(cb) {
   for (var n = 0; n < this._slaves.length; n++) {
     this._slaves[n].getConnections(oncount);
   }
+
+  return this;
 };
 
 

test/parallel/test-net-pingpong.js

@@ -37,10 +37,13 @@ function pingPongTest(port, host) {
 
   function onSocket(socket) {
     assert.strictEqual(socket.server, server);
-    server.getConnections(common.mustCall(function(err, connections) {
+    assert.strictEqual(
-      assert.ifError(err);
+      server,
-      assert.strictEqual(connections, 1);
+      server.getConnections(common.mustCall(function(err, connections) {
-    }));
+        assert.ifError(err);
+        assert.strictEqual(connections, 1);
+      }))
+    );
 
     socket.setNoDelay();
     socket.timeout = 0;