public void testRelationshipStringBuilder() {
String relation1 = "circle:";
String relation2 = ":friend";
String relation3 = "circle:friend";
RelationshipKind kind = RelationshipKind.fromString(relation1);
assertEquals("circle", kind.getGroup());
assertTrue(StringUtils.isEmpty(kind.getName()));
kind = RelationshipKind.fromString(relation2);
assertEquals("friend", kind.getName());
assertTrue(StringUtils.isEmpty(kind.getGroup()));
kind = RelationshipKind.fromString(relation3);
assertEquals("circle", kind.getGroup());
assertEquals("friend", kind.getName());
assertNull(RelationshipKind.fromString("circleFriend")); // Without
// separator
// char
}