Fix file input in tests

test/integration/index.html

@@ -2,6 +2,7 @@
     <script src="../../node_modules/scratch-vm/dist/web/scratch-vm.js"></script>
     <script src="../../node_modules/scratch-storage/dist/web/scratch-storage.js"></script>
     <script src="../../node_modules/scratch-svg-renderer/dist/web/scratch-svg-renderer.js"></script>
+    <script src="../helper/page-util.js"></script>
     <!-- note: this uses the BUILT version of scratch-render!  make sure to npm run build -->
     <script src="../../dist/web/scratch-render.js"></script>
 
@@ -15,39 +16,13 @@
 
         var canvas = document.getElementById('test');
         var render = new ScratchRender(canvas);
-        var vm = new VirtualMachine();
-        var storage = new ScratchStorage();
+        var vm = initVM(render);
         var mockMouse = data => vm.runtime.postIOData('mouse', {
             canvasWidth: canvas.width,
             canvasHeight: canvas.height,
             ...data,
         });
 
-        vm.attachStorage(storage);
-        vm.attachRenderer(render);
-        vm.attachV2SVGAdapter(new ScratchSVGRenderer.SVGRenderer());
-        vm.attachV2BitmapAdapter(new ScratchSVGRenderer.BitmapAdapter());
-
-        document.getElementById('file').addEventListener('click', e => {
-            document.body.removeChild(document.getElementById('loaded'));
-        });
-
-        document.getElementById('file').addEventListener('change', e => {
-            const reader = new FileReader();
-            const thisFileInput = e.target;
-            reader.onload = () => {
-                vm.start();
-                vm.loadProject(reader.result)
-                    .then(() => {
-                        // we add a `#loaded` div to our document, the integration suite
-                        // waits for that element to show up to assume the vm is ready
-                        // to play!
-                        const div = document.createElement('div');
-                        div.id='loaded';
-                        document.body.appendChild(div);
-                    });
-            };
-            reader.readAsArrayBuffer(thisFileInput.files[0]);
-        });
+        const loadFile = loadFileInputIntoVM.bind(null, document.getElementById('file'), vm, render);
     </script>
 </body>