Expanded cell click logic

src/main/java/TicTacToe/cell.java

@@ -22,15 +22,19 @@ public class cell extends JButton {
 	}
 
 	protected void OnMouseClick() {
-		value = ttt.player;	
-		ttt.endTurn();
-		 switch (value) {
-		 case 1:  setBackground(new Color(255,0,0));
-         break;
-		 case 2:  setBackground(new Color(0,0,255));
-         break;
-         default: ;
-         break;
+		if(value == 0) {			
+			value = ttt.player;	
+			ttt.endTurn();
+			setEnabled(false);
+			
+			switch (value) {
+			case 1:  setBackground(new Color(255,0,0));
+			break;
+			case 2:  setBackground(new Color(0,0,255));
+			break;
+			default: ;
+			break;
+		}
      }
 	}
 	

src/test/java/TicTacToe/TicTacToeGameTest.java

@@ -4,7 +4,5 @@ import static org.junit.jupiter.api.Assertions.*;
 import org.junit.jupiter.api.Test;
 
 class TicTacToeGameTest {
-
-	
 	
 }