Add pen integration test

See `pen.sb2` for details

test/integration/pen.js

@@ -0,0 +1,34 @@
+var path = require('path');
+var test = require('tap').test;
+var extract = require('../fixtures/extract');
+var VirtualMachine = require('../../src/index');
+
+var uri = path.resolve(__dirname, '../fixtures/pen.sb2');
+var project = extract(uri);
+
+test('pen', function (t) {
+    var vm = new VirtualMachine();
+
+    // Evaluate playground data and exit
+    vm.on('playgroundData', function () {
+        // @todo Additional tests
+        t.end();
+        process.nextTick(process.exit);
+    });
+
+    // Start VM, load project, and run
+    t.doesNotThrow(function () {
+        vm.start();
+        vm.clear();
+        vm.setCompatibilityMode(false);
+        vm.setTurboMode(false);
+        vm.loadProject(project);
+        vm.greenFlag();
+    });
+
+    // After two seconds, get playground data and stop
+    setTimeout(function () {
+        vm.getPlaygroundData();
+        vm.stopAll();
+    }, 2000);
+});