public void WhenViewHasBeenRemovedAndRegionManagerPropertyCleared_ThenItCanBeAddedAgainToARegion()
{
var regionManagerMock = new Mock <IRegionManager>();
regionManagerMock.Setup(x => x.CreateRegionManager())
.Returns(Mock.Of <IRegionManager>());
IRegion region = new Region {
RegionManager = regionManagerMock.Object
};
var view = new ContentView();
var scopedRegionManager = region.Add(view, null, true);
Assert.Equal(view, region.Views.First());
region.Remove(view);
view.ClearValue(Prism.Regions.Xaml.RegionManager.RegionManagerProperty);
Assert.Empty(region.Views);
var newScopedRegion = region.Add(view, null, true);
Assert.Equal(view, region.Views.First());
Assert.Same(newScopedRegion, view.GetValue(Prism.Regions.Xaml.RegionManager.RegionManagerProperty));
}