Fixed invalid move by Monte Carlo UCT. Still does not handle player's PASS.

test/net/woodyfolsom/msproj/LegalMoveTest.java

@@ -1,5 +1,6 @@
 package net.woodyfolsom.msproj;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 import org.junit.Test;
@@ -9,8 +10,14 @@ public class LegalMoveTest {
 	public void testLegalMove1Liberty() {
 		GameState gameState = new GameState(5);
 		gameState.playStone(Player.BLACK, Action.getInstance("A2"));
+		assertEquals(Player.WHITE, gameState.getPlayerToMove());
+		gameState.playStone(Player.WHITE, Action.PASS);
+		
 		gameState.playStone(Player.BLACK, Action.getInstance("B3"));
+		gameState.playStone(Player.WHITE, Action.PASS);
+		
 		gameState.playStone(Player.BLACK, Action.getInstance("B1"));
+		
 		assertTrue(gameState.playStone(Player.WHITE, Action.getInstance("B2")));
 		System.out.println(gameState);
 	}

test/net/woodyfolsom/msproj/policy/MonteCarloUCTTest.java

@@ -1,6 +1,7 @@
 package net.woodyfolsom.msproj.policy;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 
 import net.woodyfolsom.msproj.Action;
 import net.woodyfolsom.msproj.GameConfig;
@@ -54,4 +55,25 @@ public class MonteCarloUCTTest {
 
 		System.out.println(gameState);
 	}
+	
+	@Test
+	public void testIllegalMoveRejection() {
+		Policy treeSearch = new MonteCarloUCT(new RandomMovePolicy(),2000L);
+		GameState gameState = new GameState(4);
+		gameState.playStone(Player.WHITE, Action.getInstance("A2"));
+		gameState.playStone(Player.WHITE, Action.getInstance("B1"));
+		gameState.playStone(Player.WHITE, Action.getInstance("C2"));
+		gameState.playStone(Player.WHITE, Action.getInstance("B3"));
+
+		Action move;
+		
+		for (int i = 0; i < 10; i++) {
+			move = treeSearch.getAction(new GameConfig(), gameState, Player.BLACK);
+			System.out.println("Generated move: " + move);
+			GameState stateCopy = new GameState(gameState);
+			stateCopy.playStone(Player.BLACK, move);
+			System.out.println(stateCopy);
+			assertFalse(Action.getInstance("B2").equals(move));
+		}
+	}
 }