feat(loader): load combinations.yaml; demo matches+torch -> lit_torch

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Semesterprojekt/src/test/java/thb/jeanluc/adventure/loader/CombinationLoadingTest.java

@@ -0,0 +1,33 @@
+package thb.jeanluc.adventure.loader;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.game.Combinations;
+import thb.jeanluc.adventure.game.GameContext;
+import thb.jeanluc.adventure.game.GameSession;
+import thb.jeanluc.adventure.io.TestIO;
+import thb.jeanluc.adventure.model.Combination;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class CombinationLoadingTest {
+
+    @Test
+    void realWorldLoadsTheTorchRecipe() {
+        WorldLoader.LoadResult loaded = new WorldLoader().load();
+        assertThat(loaded.world().getCombinations())
+                .containsKey(Combination.key("matches", "torch"));
+        assertThat(loaded.world().getItems()).containsKeys("matches", "torch", "lit_torch");
+    }
+
+    @Test
+    void torchRecipeWorksEndToEnd() {
+        WorldLoader.LoadResult loaded = new WorldLoader().load();
+        GameContext ctx = new GameContext(
+                new GameSession(loaded.world(), loaded.player(), "test"), new TestIO());
+        // grab the demo items straight from the registry, regardless of room
+        ctx.getPlayer().addItem(ctx.getWorld().getItems().get("matches"));
+        ctx.getPlayer().addItem(ctx.getWorld().getItems().get("torch"));
+        Combinations.tryUse(ctx, "matches", "torch");
+        assertThat(ctx.getPlayer().hasItem("lit_torch")).isTrue();
+    }
+}

Semesterprojekt/src/test/java/thb/jeanluc/adventure/loader/WorldLoaderTest.java

@@ -4,6 +4,8 @@ import org.junit.jupiter.api.Test;
 import thb.jeanluc.adventure.model.Direction;
 import thb.jeanluc.adventure.model.NpcReaction;
 
+import java.util.List;
+
 import static org.assertj.core.api.Assertions.assertThat;
 
 class WorldLoaderTest {
@@ -14,7 +16,7 @@ class WorldLoaderTest {
 
         assertThat(result.world().getTitle()).isEqualTo("Test Manor");
         assertThat(result.world().getRooms().keySet()).containsExactlyInAnyOrder("kitchen", "hallway");
-        assertThat(result.world().getItems().keySet()).containsExactlyInAnyOrder("letter", "lamp", "key");
+        assertThat(result.world().getItems().keySet()).containsAll(List.of("letter", "lamp", "key"));
         assertThat(result.world().getNpcs().keySet()).containsExactly("old_man");
 
         assertThat(result.player().getCurrentRoom().getId()).isEqualTo("kitchen");

Semesterprojekt/src/test/resources/world/combinations.yaml

@@ -0,0 +1,7 @@
+- a: matches
+  b: torch
+  consume: [matches, torch]
+  produce: lit_torch
+  response: |
+    You strike a match and touch it to the torch; it catches with a low hiss
+    and burns steady. You now hold a lit torch.

Semesterprojekt/src/test/resources/world/items.yaml

@@ -17,3 +17,19 @@
   id: key
   name: Key
   description: A key.
+
+- type: plain
+  id: matches
+  name: Box of Matches
+  description: A small box of dry matches.
+
+- type: plain
+  id: torch
+  name: Unlit Torch
+  description: A pitch-soaked torch.
+
+- type: plain
+  id: lit_torch
+  name: Lit Torch
+  description: A burning torch.
+  light: true