### Question:
PriorityHelper { public static boolean isHighLevel(int priority) { return priority == 0 || priority == 1 || priority == 2; } private  PriorityHelper(); static boolean isHighLevel(int priority); static boolean isMediumLevel(int priority); static boolean isLowLevel(int priority); static int calculateWeightedPenalty(int priority, int endTime);  }### Answer:
@Test public void isHighLevel() { Stream.of(0, 1, 2).forEach(level -> assertTrue(PriorityHelper.isHighLevel(level))); }