public void Test_AddDefaultElements()
        {
            Person         user1           = Model.AddPerson("User 1");
            Person         user2           = Model.AddPerson("User 2");
            SoftwareSystem softwareSystem1 = Model.AddSoftwareSystem("Software System 1");
            SoftwareSystem softwareSystem2 = Model.AddSoftwareSystem("Software System 2");

            user1.Uses(softwareSystem1, "");
            softwareSystem1.Uses(softwareSystem2, "");
            user2.Uses(softwareSystem2, "");

            view = Views.CreateSystemContextView(softwareSystem1, "key", "description");
            view.AddDefaultElements();

            Assert.Equal(3, view.Elements.Count);
            Assert.True(view.Elements.Contains(new ElementView(user1)));
            Assert.False(view.Elements.Contains(new ElementView(user2)));
            Assert.True(view.Elements.Contains(new ElementView(softwareSystem1)));
            Assert.True(view.Elements.Contains(new ElementView(softwareSystem2)));
        }