public void clear_objects_from_the_explorer_pane() { var leftObject1 = new object(); var leftObject2 = new object(); registry.PlaceInExplorerPane(leftObject1, "some text"); registry.PlaceInExplorerPane(leftObject2, "some text"); registry.ClearTransient(); shell.AssertWasCalled(x => x.RemoveFromExplorerPane(leftObject1)); shell.AssertWasCalled(x => x.RemoveFromExplorerPane(leftObject2)); }