fixed tests

playground/src/app.js

 
 export function start() {
   registerContainers();
+
   Navigation.onAppLaunched(() => {
     Navigation.startApp({
       container: {

src/commands/LayoutTreeParser.js

 
   createContainer(container) {
     return {
-      data: {
-        ...container
-      },
+      data: _.merge({}, container),
       type: 'Container',
       id: this.uniqueIdProvider.generate(`Container`),
       children: []

src/commands/LayoutTreeParser.test.js

     uut = new LayoutTreeParser(uniqueIdProvider);
   });
 
+  it('adds uniqueId to containers', () => {
+    const input = { container: {} };
+    expect(uut.parseFromSimpleJSON(input))
+      .toEqual({
+        type: 'ContainerStack',
+        id: 'ContainerStack+UNIQUE_ID',
+        children: [
+          {
+            type: 'Container',
+            id: 'Container+UNIQUE_ID',
+            data: {},
+            children: []
+          }
+        ]
+      });
+  });
+
   it('parses single screen', () => {
     expect(uut.parseFromSimpleJSON(SimpleLayouts.singleScreenApp))
       .toEqual({
       });
   });
 
-  xit('adds uniqueId to containers', () => {
-    const input = { container: {} };
-    expect(uut.parse(input)).toEqual({ container: { id: 'Container+UNIQUE_ID' } });
-  });
-
   xit('parses side menus', () => {
     //const result2 = {
     //  type: 'Menus',