public async Task NavigateBackFromChildView()
{
var fixture = CreateRoutedViewHost();
var mainPage = fixture.CurrentPage;
await _navigationViewModel.Navigate(nameof(ChildViewModel));
await _navigationViewModel.NavigateBack();
var currentPage = fixture.CurrentPage;
Assert.Equal(mainPage, currentPage);
Assert.IsType <MainView>(currentPage);
Assert.IsType <MainViewModel>(currentPage.BindingContext);
Assert.NotNull(currentPage.BindingContext);
Assert.Equal("Main view", currentPage.Title);
Assert.Equal(1, fixture.StackDepth);
}
