fix check_interrupt_prediction test

core/tests/check_interrupt_prediction.rs

@@ -109,7 +109,7 @@ fn test_interrupt_prediction(rom: &str, timeout: u64) -> bool {
     let vblank = Arc::new(Mutex::new(VBlank::default()));
 
     let mut game_boy_a = GameBoy::new(None, cartridge.clone());
-    game_boy_a.predict_interrupt = false;
+    game_boy_a.predict_interrupt = true;
     game_boy_a.v_blank = Some(Box::new({
         let vblank = vblank.clone();
         move |gb| {
@@ -123,7 +123,7 @@ fn test_interrupt_prediction(rom: &str, timeout: u64) -> bool {
     }));
 
     let mut game_boy_b = GameBoy::new(None, cartridge);
-    game_boy_b.predict_interrupt = true;
+    game_boy_b.predict_interrupt = false;
     game_boy_b.v_blank = Some(Box::new({
         let vblank = vblank.clone();
         move |gb| {
@@ -149,7 +149,8 @@ fn test_interrupt_prediction(rom: &str, timeout: u64) -> bool {
             inter.interpret_op();
         }
         // print!("\u{001b}[0m");
-        {
+        // the gameboy with predict interrupt may skip most part of a halt.
+        while game_boy_b.clock_count < game_boy_a.clock_count {
             let mut inter = Interpreter(&mut game_boy_b);
             inter.interpret_op();
         }