test: improve test-net-server-pause-on-connect

Previously the test had a massive timeout (3s!), reduce this to a
platform specific timeout of 50ms.

This test runs two servers at the same time in an attempt to compare
behaviour. I've added a check to make sure one event fires before the
other event, as is expected, but that is a possible race condition.

Improves test run time on my machine from 0m3.141s to 0m0.356s.

PR-URL: #2429
Reviewed-By: Rich Trott <rtrott@gmail.com>

test/parallel/test-net-server-pause-on-connect.js

@@ -16,14 +16,22 @@ var server1 = net.createServer({pauseOnConnect: true}, function(socket) {
   });
 
   setTimeout(function() {
+    // After 50(ish) ms, the other socket should have already read the data.
+    assert.equal(read, true);
     assert.equal(socket.bytesRead, 0, 'no data should have been read yet');
+
     socket.resume();
     stopped = false;
-  }, 3000);
+  }, common.platformTimeout(50));
 });
 
+// read is a timing check, as server1's timer should fire after server2's
+// connection receives the data. Note that this could be race-y.
+var read = false;
 var server2 = net.createServer({pauseOnConnect: false}, function(socket) {
   socket.on('data', function(data) {
+    read = true;
+
     assert.equal(data.toString(), msg, 'invalid data received');
     socket.end();
     server2.close();
@@ -37,3 +45,8 @@ server1.listen(common.PORT, function() {
 server2.listen(common.PORT + 1, function() {
   net.createConnection({port: common.PORT + 1}).write(msg);
 });
+
+process.on('exit', function() {
+  assert.equal(stopped, false);
+  assert.equal(read, true);
+});