// --------------------------------------------------------- helper methods
@SuppressWarnings("unchecked")
void prepareGetMinutes()
{
final GetDurationsResult getDurationsResult = new GetDurationsResult(new Durations(new Duration(1), new Duration(2),
new Duration(3)));
Answer<Object> getDurationsAnswer = new Answer<Object>()
{
@Override
public Object answer(InvocationOnMock invocation)