feat(sdk): creating a frame by default at the end of each gameTurn

Author: NaejDoree

engine/core/src/main/java/com/codingame/gameengine/core/GameManager.java

@@ -122,6 +122,13 @@ void start(InputStream is, PrintStream out) {
                 referee.gameTurn(turn);
                 registeredModules.forEach(Module::onAfterGameTurn);
 
+                // Create a frame if no player has been executed
+                if (players.stream().noneMatch(p -> p.hasBeenExecuted())) {
+                    for (T player : players) {
+                        execute(player, 0);
+                    }
+                }
+
                 // reset players' outputs
                 for (AbstractPlayer player : players) {
                     player.resetOutputs();
@@ -163,8 +170,10 @@ void start(InputStream is, PrintStream out) {
      * 
      * @param player
      *            Player to execute.
+     * @param nbrOutputLines
+     *            The amount of expected output lines from the player.
      */
-    void execute(T player) {
+    protected void execute(T player, int nbrOutputLines) {
         if (!this.initDone) {
             throw new RuntimeException("Impossible to execute a player during init phase.");
         }
@@ -180,7 +189,7 @@ void execute(T player) {
         dumpView();
         dumpInfos();
         dumpNextPlayerInput(player.getInputs().toArray(new String[0]));
-        if (player.getExpectedOutputLines() > 0) {
+        if (nbrOutputLines > 0) {
             addTurnTime();
         }
         dumpNextPlayerInfos(player.getIndex(), player.getExpectedOutputLines(), player.hasNeverBeenExecuted() ? firstTurnMaxTime : turnMaxTime);
@@ -203,6 +212,16 @@ void execute(T player) {
         newTurn = false;
     }
 
+    /**
+     * Executes a player for a maximum of turnMaxTime milliseconds and store the output. Used by player.execute().
+     * 
+     * @param player
+     *            Player to execute.
+     */
+    void execute(T player) {
+        execute(player, player.getExpectedOutputLines());
+    }
+
     /**
      * Swap game summary and view.
      *