public async Task NavigateToSecondChildView()
{
var fixture = CreateRoutedViewHost();
await _navigationViewModel.Navigate(nameof(ChildViewModel));
var viewModel = await _navigationViewModel.NavigateToChild("Testing");
Assert.NotNull(viewModel);
var currentPage = fixture.CurrentPage;
Assert.NotNull(currentPage);
Assert.IsType <ChildView>(currentPage);
Assert.IsType <ChildViewModel>(currentPage.BindingContext);
Assert.Equal(viewModel, currentPage.BindingContext);
Assert.Equal("Child view: Testing", currentPage.Title);
Assert.Equal(3, fixture.StackDepth);
}
