URL url = context.getRootURL();
VirtualFile child1 = getChildHandler(context, "child1").getVirtualFile();
VirtualFile child11 = getChildHandler(context, "child1/child1,1").getVirtualFile();
VirtualFile root = VFS.getRoot(url);
assertEquals(url, root.toURL());
VirtualFile found1 = root.findChild("child1");
assertEquals(child1.toURL(), found1.toURL());
VirtualFile found11 = root.findChild("child1/child1,1");