public void DeactivateThrows()
        {
            IRegion region = new AllActiveRegion();
            var view = new object();
            region.Add(view);

            region.Deactivate(view);
        }
        public void AddingViewsToRegionMarksThemAsActive()
        {
            IRegion region = new AllActiveRegion();
            var view = new object();

            region.Add(view);

            Assert.IsTrue(region.ActiveViews.Contains(view));
        }