public void testClear() { DoubleObjectStorage storage = mock(DoubleObjectStorage.class); DoubleCharacterCache cache = (DoubleCharacterCache) Wrapping.getFactory( new Signature(double.class, Object.class), new Signature(double.class, char.class), false) .wrap("123", CALCULATABLE, storage, new MutableStatisticsImpl()); cache.setDependencyNode(DependencyTracker.DUMMY_NODE); cache.clear(); verify(storage).clear(); verifyNoMoreInteractions(storage); }