@Test
public void testDefaultCase() {

    Observable<Integer> source1 = Observable.from(1, 2, 3);
    Observable<Integer> source2 = Observable.from(4, 5, 6);
    Map<Integer, Observable<Integer>> map = new HashMap<Integer, Observable<Integer>>();
    map.put(1, source1);
    Observable<Integer> result = Statement.switchCase(func, map, source2);
    observe(result, 1, 2, 3);
    observe(result, 4, 5, 6);
    observe(result, 4, 5, 6);
}