private void setupShellMocks(String username, List<String> groups) throws IOException {
PowerMockito.mockStatic(CommonUtils.class);
PowerMockito.when(CommonUtils.getUnixGroups(Mockito.eq(username))).thenReturn(groups);
}
/**
* Returns list of groups for a user.
*
* @param user get groups for this user
* @return list of groups for a given user
* @throws IOException when getting the UNIX groups
*/
@Override
public List<String> getGroups(String user) throws IOException {
List<String> groups = CommonUtils.getUnixGroups(user);
// remove duplicated primary group
return new ArrayList<String>(new LinkedHashSet<String>(groups));
}