Add unit test for hasAllUniqueCharacters() method#2

DatMV01 merged 2 commits intomasterDatMV01/Algorithms-and-Data-Structures-in-Java:masterfrom

test/add-unittest-for-hasAllUniqueCharactersDatMV01/Algorithms-and-Data-Structures-in-Java:test/add-unittest-for-hasAllUniqueCharactersCopy head branch name to clipboard