java.lang.NullPointerException at hangman.GameTest.testProcessGuess(GameTest.java:91) java.lang.NullPointerException at hangman.GameTest.testGetWord(GameTest.java:48) java.lang.NullPointerException at hangman.GameTest.testGetRemainingGuesses(GameTest.java:62) java.lang.NullPointerException at hangman.GameTest.testDoHint(GameTest.java:105) java.lang.NullPointerException at hangman.GameTest.testGetDisplay(GameTest.java:76)