added static method convertSimpleToState to Board class with test

src/main/java/Game/Game.java

@@ -6,7 +6,7 @@ public abstract class Game {
 
     protected ArrayList<String> outputBuffer = new ArrayList<>();
 
-    public abstract void update(String string);
+    public abstract void update(String input);
 
     public void print() {
         for (String s : outputBuffer) {
@@ -21,7 +21,4 @@ public abstract class Game {
     public ArrayList<String> getOutputBuffer() {
         return this.outputBuffer;
     }
-
-
-
 }

src/main/java/Game/TicTacToe/Board.java

@@ -9,6 +9,14 @@ public class Board {
         CROSS,
         EMPTY
     }
+
+    enum CurrentState {
+        DRAW,
+        CIRCLEWIN,
+        CROSSWIN,
+        NOTFINÌSHED
+    }
+
     private State[] states;
 
 
@@ -34,17 +42,20 @@ public class Board {
         }
     }
 
-    public void setCellState(int cell, boolean cross) {
+    public boolean setCellState(int cell, boolean cross) {
         if (cell <= 9 && cell >= 1) {
             if (this.states[cell-1] != State.EMPTY) {
-                return;
+                return false;
             }
             if (cross) {
                 this.states[cell-1] = State.CROSS;
             } else {
                 this.states[cell-1] = State.CIRCLE;
             }
+        }else {
+            return false;
         }
+        return true;
     }
 
 
@@ -91,4 +102,30 @@ public class Board {
         }
         return true;
     }
+
+
+    //Checkfull(draw), Checkwinner clear,neue Runde und Scoreboard
+
+
+
+    public static State[] convertSimpleToState(int[] temp) {
+        if (temp.length != 9)
+            return null;
+
+        State[] stateArray = new State[9];
+        for (int i = 0; i < temp.length; i++) {
+            switch(temp[i]) {
+                case 1:
+                    stateArray[i] = State.CIRCLE;
+                    break;
+                case 2:
+                    stateArray[i] = State.CROSS;
+                    break;
+                default:
+                    stateArray[i] = State.EMPTY;
+            }
+        }
+        return stateArray;
+    }
+
 }

src/main/java/Game/Tictactoe.java

@@ -19,7 +19,19 @@ public class Tictactoe extends Game {
 
     @Override
     public void update(String input) {
+        outputBuffer.clear();
+        boolean validTurn = currentBoard.setCellState(Integer.parseInt(input), crossTurn);
         outputBuffer.addAll(currentBoard.getOutputBoard());
+        if(validTurn) {
+            switchTurn();
+        } else {
+            outputBuffer.add("Invalid Turn!");
+        }
+        outputBuffer.add((crossTurn?"Cross":"Circle") + " it´s your Turn, please choose a Cell:");
+    }
+
+    public void switchTurn() {
+        crossTurn = !crossTurn;
     }
 
 }

src/test/java/Game/TicTacToe/BoardTest.java

@@ -4,10 +4,12 @@ import Game.Tictactoe;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.mockito.internal.util.reflection.FieldSetter;
 
 import java.util.Arrays;
 
 import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.mock;
 
 class BoardTest {
 
@@ -59,4 +61,23 @@ class BoardTest {
         board.getStates()[0] = Board.State.CROSS;
         assertEquals(board, secondBoard);
     }
+
+
+    @Test
+    void convertSimpleToState() {
+        int[] test = {1, 1, 1, 2, 0, 2, 2, 0, 0};
+        Board.State[] expected = {Board.State.CIRCLE, Board.State.CIRCLE, Board.State.CIRCLE, Board.State.CROSS, Board.State.EMPTY, Board.State.CROSS, Board.State.CROSS, Board.State.EMPTY, Board.State.EMPTY};
+        int[] test2 = {1, 0, 0, 1, 0, 0, 1, 0, 0};
+        Board.State[] expected2 = {Board.State.CIRCLE, Board.State.EMPTY, Board.State.EMPTY, Board.State.CIRCLE, Board.State.EMPTY, Board.State.EMPTY, Board.State.CIRCLE, Board.State.EMPTY, Board.State.EMPTY};
+        int[] test3 = {69, 0, 0, 0, 1, 0, 0, 0, 1};
+        Board.State[] expected3 = {Board.State.CIRCLE, Board.State.EMPTY, Board.State.EMPTY, Board.State.EMPTY, Board.State.CIRCLE, Board.State.EMPTY, Board.State.EMPTY, Board.State.EMPTY, Board.State.CIRCLE};
+        int[] test4 = {3, 0, 0, 0, 1, 0, 0, 0, 1};
+        Board.State[] expected4 = {Board.State.EMPTY, Board.State.EMPTY, Board.State.EMPTY, Board.State.EMPTY, Board.State.CIRCLE, Board.State.EMPTY, Board.State.EMPTY, Board.State.EMPTY, Board.State.CIRCLE};
+        int[] test5 = {3, 0, 0, 0, 1, 0, 0, 0};
+        assertTrue(Arrays.deepEquals(expected, Board.convertSimpleToState(test)));
+        assertTrue(Arrays.deepEquals(expected2, Board.convertSimpleToState(test2)));
+        assertFalse(Arrays.deepEquals(expected3, Board.convertSimpleToState(test3)));
+        assertTrue(Arrays.deepEquals(expected4, Board.convertSimpleToState(test4)));
+        assertNull(Board.convertSimpleToState(test5));
+    }
 }