public void NullingViewModelShouldUnloadIt()
{
var vm = new ViewAwareViewModel();
var fixture = new LoadingView();
fixture.ViewModel = vm;
Assert.Equal(0, vm.IsLoadedCount);
Assert.Equal(0, fixture.IsLoadedCount);
fixture.Loaded.OnNext(Unit.Default);
Assert.Equal(1, vm.IsLoadedCount);
Assert.Equal(1, fixture.IsLoadedCount);
fixture.ViewModel = null;
Assert.Equal(0, vm.IsLoadedCount);
fixture.Dispose();
}
public void LoadingGetRefCounted()
{
var fixture = new ViewAwareViewModel();
Assert.Equal(0, fixture.IsLoadedCount);
fixture.View.ViewLoaded();
Assert.Equal(1, fixture.IsLoadedCount);
fixture.View.ViewLoaded();
Assert.Equal(1, fixture.IsLoadedCount);
fixture.View.ViewUnloaded();
Assert.Equal(1, fixture.IsLoadedCount);
// Refcount drops to zero
fixture.View.ViewUnloaded();
Assert.Equal(0, fixture.IsLoadedCount);
}
public void CanUnloadAndLoadViewAgain()
{
var vm = new ViewAwareViewModel();
var fixture = new LoadingView();
fixture.ViewModel = vm;
Assert.Equal(0, vm.IsLoadedCount);
Assert.Equal(0, fixture.IsLoadedCount);
fixture.Loaded.OnNext(Unit.Default);
Assert.Equal(1, vm.IsLoadedCount);
Assert.Equal(1, fixture.IsLoadedCount);
fixture.Unloaded.OnNext(Unit.Default);
Assert.Equal(0, vm.IsLoadedCount);
Assert.Equal(0, fixture.IsLoadedCount);
fixture.Loaded.OnNext(Unit.Default);
Assert.Equal(1, vm.IsLoadedCount);
Assert.Equal(1, fixture.IsLoadedCount);
fixture.Dispose();
}