test-with-mock-attributes-as-map.java

Item item = mock(Item.class);
Map<String, Set<String>> attributes = mock(Map.class);
Set<String> values = mock(Set.class);
Iterator<String> iterator = mock(Iterator.class);
when(iterator.next()).thenReturn("the single value");
when(values.iterator()).thenReturn(iterator);
when(attributes.containsKey("the-key")).thenReturn(true);
when(attributes.get("the-key")).thenReturn(values);
when(item.getAttributes()).thenReturn(attributes);