semesterprojekt: implement full text adventure (phases 1-7)

Walking skeleton through Swing GUI: YAML-driven world (4 rooms,
4 items, 1 NPC), HashMap command dispatch with parser, three-tier
item hierarchy (readable / switchable / plain), and end-to-end
NPC give/receive flow. 67 tests green.

Semesterprojekt/src/test/java/thb/jeanluc/adventure/game/GameTest.java

@@ -0,0 +1,58 @@
+package thb.jeanluc.adventure.game;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.command.CommandParser;
+import thb.jeanluc.adventure.command.CommandRegistry;
+import thb.jeanluc.adventure.command.impl.GoCommand;
+import thb.jeanluc.adventure.command.impl.LookCommand;
+import thb.jeanluc.adventure.command.impl.QuitCommand;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Direction;
+import thb.jeanluc.adventure.model.Player;
+import thb.jeanluc.adventure.model.Room;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class GameTest {
+
+    @Test
+    void run_dispatchesCommands_andQuitsCleanly() {
+        Room kitchen = new Room("kitchen", "Kitchen", "kd");
+        Room hallway = new Room("hallway", "Hallway", "hd");
+        kitchen.addExit(Direction.NORTH, hallway);
+        Player player = new Player(kitchen, 0);
+        TestIO io = new TestIO()
+                .enqueue("go north")
+                .enqueue("quit");
+        GameContext ctx = new GameContext(null, player, io);
+
+        CommandRegistry registry = new CommandRegistry();
+        registry.register(new GoCommand(), "go");
+        registry.register(new LookCommand(), "look");
+        QuitCommand quit = new QuitCommand();
+        registry.register(quit, "quit");
+
+        Game game = new Game(ctx, registry, new CommandParser());
+        quit.bind(game);
+        game.run();
+
+        assertThat(player.getCurrentRoom()).isEqualTo(hallway);
+        assertThat(io.allOutput()).contains("Goodbye");
+    }
+
+    @Test
+    void run_unknownVerb_writesHint() {
+        Player player = new Player(new Room("r", "R", "d"), 0);
+        TestIO io = new TestIO().enqueue("dance").enqueue("quit");
+        GameContext ctx = new GameContext(null, player, io);
+
+        CommandRegistry registry = new CommandRegistry();
+        QuitCommand quit = new QuitCommand();
+        registry.register(quit, "quit");
+        Game game = new Game(ctx, registry, new CommandParser());
+        quit.bind(game);
+        game.run();
+
+        assertThat(io.allOutput()).contains("don't understand 'dance'");
+    }
+}