@Test public void testGetCacheKey() { RegexDimFilter regexDimFilter = new RegexDimFilter("dim", "reg", null); RegexDimFilter regexDimFilter2 = new RegexDimFilter("di", "mreg", null); Assert.assertFalse(Arrays.equals(regexDimFilter.getCacheKey(), regexDimFilter2.getCacheKey())); RegexDimExtractionFn regexFn = new RegexDimExtractionFn(".*", false, null); RegexDimFilter regexDimFilter3 = new RegexDimFilter("dim", "reg", regexFn); Assert.assertFalse(Arrays.equals(regexDimFilter.getCacheKey(), regexDimFilter3.getCacheKey())); }