feat(loader): CombinationDto + CombinationFactory with id validation

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

@@ -0,0 +1,52 @@
+package thb.jeanluc.adventure.loader;
+
+import org.junit.jupiter.api.Test;
+import thb.jeanluc.adventure.loader.dto.CombinationDto;
+import thb.jeanluc.adventure.model.Combination;
+import thb.jeanluc.adventure.model.item.Item;
+import thb.jeanluc.adventure.model.item.PlainItem;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+class CombinationFactoryTest {
+
+    private Map<String, Item> items() {
+        Map<String, Item> m = new HashMap<>();
+        for (String id : List.of("matches", "torch", "lit_torch")) {
+            m.put(id, PlainItem.builder().id(id).name(id).description("d").light(false).build());
+        }
+        return m;
+    }
+
+    @Test
+    void buildsCombinationFromDto() {
+        CombinationDto dto = new CombinationDto("matches", "torch", null,
+                List.of("matches", "torch"), "lit_torch", null, "You light it.", null);
+        Combination c = CombinationFactory.fromDto(dto, items());
+        assertThat(c.key()).isEqualTo("matches|torch");
+        assertThat(c.consume()).containsExactly("matches", "torch");
+        assertThat(c.produce()).isEqualTo("lit_torch");
+        assertThat(c.response()).isEqualTo("You light it.");
+    }
+
+    @Test
+    void rejectsUnknownOperandId() {
+        CombinationDto dto = new CombinationDto("matches", "ghost", null, null, null, null, "x", null);
+        assertThatThrownBy(() -> CombinationFactory.fromDto(dto, items()))
+                .isInstanceOf(WorldLoadException.class)
+                .hasMessageContaining("ghost");
+    }
+
+    @Test
+    void rejectsUnknownProduceId() {
+        CombinationDto dto = new CombinationDto("matches", "torch", null, null, "phantom", null, "x", null);
+        assertThatThrownBy(() -> CombinationFactory.fromDto(dto, items()))
+                .isInstanceOf(WorldLoadException.class)
+                .hasMessageContaining("phantom");
+    }
+}