Create TDD example

src/main/java/com/hangman/players/YourPlayer.java

@@ -2,11 +2,65 @@
 
 import com.hangman.Player;
 
-import java.util.List;
+import java.util.*;
 
 public class YourPlayer implements Player {
+    private Stack<Character> priorityStack = new Stack();
+    private Stack<Character> secondaryStack = new Stack();
+
+    private List<Character> priorityCharacters = new ArrayList();
+    private List<Character> secondaryCharacters = new ArrayList();
+
+    private boolean emptyCurrentClueList = true;
+
+    public YourPlayer(){
+        priorityCharacters = Arrays.asList('u', 'l', 'd', 'r', 'h', 's', 'n', 'i', 'o', 'a', 't', 'e');
+
+        secondaryCharacters = Arrays.asList('b', 'c', 'd', 'f', 'g', 'j', 'k', 'm', 'p', 'q', 'v', 'w', 'x', 'y', 'z');
+
+        for (Character letter : priorityCharacters){
+            priorityStack.push(letter);
+        }
+
+        for (Character letter : secondaryCharacters){
+            secondaryStack.push(letter);
+        }
+    }
+
     @Override
     public char getGuess(List<Character> currentClue) {
-        return 'a';
+        checkIfEmptyCurrentClueList(currentClue);
+
+        if (emptyCurrentClueList){
+            return priorityStack.pop();
+        }
+        else {
+            return getNextGuess();
+        }
+    }
+
+    private void checkIfEmptyCurrentClueList(List<Character> currentClue){
+        for (Character element : currentClue)
+            if (element != null){
+                emptyCurrentClueList = false;
+            }
+    }
+    private char getNextGuess(){
+        if (priorityStack.isEmpty()){
+            return getGuessFromSecondaryStack();
+        }
+        else {
+            return priorityStack.pop();
+        }
+    }
+
+    private char getGuessFromSecondaryStack(){
+        if (secondaryStack.isEmpty()){
+            // No more guesses left ... ???
+            return 'A';
+        }
+        else {
+            return secondaryStack.pop();
+        }
     }
 }

src/test/java/com/hangman/players/YourPlayerTest.java

@@ -1,8 +1,13 @@
 package com.hangman.players;
 
 import org.junit.Test;
+
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.List;
+
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
 
 public class YourPlayerTest {
     @Test
@@ -11,24 +16,20 @@ public void guessesAWhenThereAreNoSuccessfulCharactersGuessedYet() {
 
         char guess = player.getGuess(Arrays.asList(null, null, null));
 
-        assertEquals('a', guess);
+        assertEquals('e', guess);
     }
 
     @Test
-    public void guessesAWhenThereAreSuccessfulCharactersGuessedThatAreNotA() {
+    public void guessesLetterNotInCurrentClueList() {
         YourPlayer player = new YourPlayer();
 
         char guess = player.getGuess(Arrays.asList('m', null, 'n'));
 
-        assertEquals('a', guess);
+        boolean guessNotInList = assertGuessNotInList(guess, Arrays.asList('m', null, 'n'));
+        assertEquals(true, guessNotInList);
     }
 
-    @Test
-    public void guessesAWhenAIsThereAreAsInTheClueAsWell() {
-        YourPlayer player = new YourPlayer();
-
-        char guess = player.getGuess(Arrays.asList(null, 'a', null));
-
-        assertEquals('a', guess);
+    static boolean assertGuessNotInList(char guess, List<Character> currentClueList) {
+        return (!(currentClueList.contains(guess)));
     }
 }