public void TestIsChildOf() { Placemark placemark = null; Assert.That(() => placemark.IsChildOf <Folder>(), Throws.TypeOf <ArgumentNullException>()); placemark = new Placemark(); Assert.False(placemark.IsChildOf <Folder>()); var folder = new Folder(); folder.AddFeature(placemark); Assert.True(placemark.IsChildOf <Folder>()); Assert.False(placemark.IsChildOf <Kml>()); var kml = new Kml(); kml.Feature = folder; Assert.True(placemark.IsChildOf <Kml>()); }