public void Test_ClearScene_Negative()
{
// Arrange
var scene = new SceneViewModel {
Model3D = new Model3DGroup(), CoordinatesBoundingBox = new Point3DCollection(), ManipulatorValue = 10.0
};
// Act
scene.ClearScene();
// Assert
Assert.IsNull(scene.Model3D);
Assert.IsNull(scene.CoordinatesBoundingBox);
Assert.AreNotEqual(10, scene.ManipulatorValue);
}