it('should find child', () => {
var papa = new NavigationTreeNode('Eddard Stark');
var baby = new NavigationTreeNode('Robb Stark');
papa.appendChild(baby);
expect(papa.indexOf(baby)).toEqual(0);
papa.removeChild(baby);
expect(papa.indexOf(baby)).toEqual(-1);
});
it('should removeChild', () => {
var papa = new NavigationTreeNode('Eddard Stark');
var baby = new NavigationTreeNode('Robb Stark');
papa.appendChild(baby);
papa.removeChild(baby);
expect(papa.getChildAt(0)).toEqual(null);
expect(papa.getChildrenCount()).toEqual(0);
expect(baby.getParent()).toEqual(null);
});