All test ran successfully except three which is returning [
// assertEquals(Arrays.asList(), RepeatingWord.findWord(" ... "));
// assertEquals(Arrays.asList(), RepeatingWord.findWord(" ' "));
// assertEquals(Arrays.asList(), RepeatingWord.findWord(" ''' "));

Getting error of comparison of
org.opentest4j.AssertionFailedError: expected: java.util.Arrays$ArrayList@5abca1e0<[]> but was: java.util.ArrayList@2286778<[]>
how ever i am using comparator and in comparison its giving error in unit test only.

yes actually, missed one test case. thanks

abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZReturnsTwentySix

How its expecting 26? It should be 13