Expanded cell click logic

src/main/java/TicTacToe/cell.java

@@ -22,8 +22,11 @@ public class cell extends JButton {
 	}
 
 	protected void OnMouseClick() {
+		if(value == 0) {			
 			value = ttt.player;	
 			ttt.endTurn();
+			setEnabled(false);
+			
 			switch (value) {
 			case 1:  setBackground(new Color(255,0,0));
 			break;
@@ -33,6 +36,7 @@ public class cell extends JButton {
 			break;
 		}
      }
+	}
 	
 	
 	

src/test/java/TicTacToe/TicTacToeGameTest.java

@@ -5,6 +5,4 @@ import org.junit.jupiter.api.Test;
 
 class TicTacToeGameTest {
 	
-	
-	
 }