### Question:
Cooldown { public long getDurationMillis() { return durationMillis; } Cooldown(long durationMillis); long getDurationMillis(); void setDurationMillis(long durationMillis); void start(); boolean isExpired();  }### Answer:
@Test public void getDurationInMillisReturnsCorrectValue() { assertEquals(COOLDOWN, cooldown.getDurationMillis()); }