Added graceful shutdown test

test/master.js

@@ -0,0 +1,27 @@
+
+/**
+ * Module dependencies.
+ */
+
+var cluster = require('../')
+  , should = require('../support/should')
+  , http = require('http')
+  , fs = require('fs');
+
+require('./common');
+
+var server = http.createServer(function(req, res){
+  setTimeout(function(){
+    res.writeHead(200);
+    res.end('Hello World');
+  }, 1000);
+});
+
+cluster = cluster(server)
+  .set('workers', 2)
+  .use(cluster.pidfiles())
+  .listen(3000);
+
+cluster.on('listening', function(){
+  console.log('listening');
+});

test/pids/.gitignore

@@ -0,0 +1 @@
+*.pid

test/test.graceful-shutdown.js

@@ -0,0 +1,37 @@
+
+/**
+ * Module dependencies.
+ */
+
+var spawn = require('child_process').spawn
+  , should = require('should')
+  , http = require('http');
+
+require('./common');
+
+var calls = 0;
+
+// child process
+
+var child = spawn('node', [__dirname + '/master.js']);
+
+// listening
+
+child.stdout.on('data', function(chunk){
+  var options = { host: 'localhost', port: 3000 };
+
+  http.get(options, function(res){
+    ++calls;
+    res.statusCode.should.equal(200);
+    child.kill('SIGQUIT');
+  });
+
+  http.get(options, function(res){
+    ++calls;
+    res.statusCode.should.equal(200);
+  });
+});
+
+child.on('exit', function(){
+  calls.should.equal(2);
+});