// testing ArtGroup.artistArray relationship
ArtGroup aGroup = context.newObject(ArtGroup.class);
aGroup.setName("Group Name");
Artist anArtist = context.newObject(Artist.class);
anArtist.setArtistName("A Name");
aGroup.addToArtistArray(anArtist);
context.commitChanges();
// Preconditions
assertTrue(aGroup.getArtistArray().contains(anArtist));