@Test
public void testIsMember() {

    GroupDocumentation groupDocumentation = new GroupDocumentation();
    List<GroupMember> members = new ArrayList<GroupMember>();
    groupDocumentation.setGroupMembers(members);
    assertFalse(groupDocumentation.isMember(itemDocumentation));
    GroupMember member = new GroupMember();
    member.setId(this.itemDocumentation.getId().substring(0, 3));
    members.add(member);
    assertTrue(groupDocumentation.isMember(itemDocumentation));
}