Add tests for arena revocation controller

Author: LegendaryForge

src/test/java/io/github/legendaryforge/legendary/core/internal/legendary/arena/ArenaRevocationControllerTest.java

@@ -0,0 +1,56 @@
+package io.github.legendaryforge.legendary.core.internal.legendary.arena;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import io.github.legendaryforge.legendary.core.api.event.EventBus;
+import io.github.legendaryforge.legendary.core.api.event.Subscription;
+import io.github.legendaryforge.legendary.core.api.id.ResourceId;
+import io.github.legendaryforge.legendary.core.internal.event.SimpleEventBus;
+import io.github.legendaryforge.legendary.core.internal.legendary.arena.event.ParticipationRevokedEvent;
+import java.util.UUID;
+import java.util.concurrent.atomic.AtomicBoolean;
+import org.junit.jupiter.api.Test;
+
+final class ArenaRevocationControllerTest {
+
+    @Test
+    void revokeMarksTrackerAndEmitsEventForLegendaryInstances() {
+        EventBus bus = new SimpleEventBus();
+        ArenaRevocationTracker tracker = new ArenaRevocationTracker();
+
+        AtomicBoolean seen = new AtomicBoolean(false);
+        Subscription sub = bus.subscribe(ParticipationRevokedEvent.class, e -> seen.set(true));
+
+        ArenaRevocationController controller = new ArenaRevocationController(tracker, bus, id -> true);
+
+        UUID instanceId = UUID.randomUUID();
+        UUID playerId = UUID.randomUUID();
+        controller.revoke(instanceId, playerId, new ResourceId("legendary", "rule_violation"));
+
+        assertTrue(tracker.isRevoked(instanceId, playerId), "tracker should mark revoked");
+        assertTrue(seen.get(), "should emit ParticipationRevokedEvent");
+
+        sub.unsubscribe();
+    }
+
+    @Test
+    void revokeNoopsForNonLegendaryInstances() {
+        EventBus bus = new SimpleEventBus();
+        ArenaRevocationTracker tracker = new ArenaRevocationTracker();
+
+        AtomicBoolean seen = new AtomicBoolean(false);
+        Subscription sub = bus.subscribe(ParticipationRevokedEvent.class, e -> seen.set(true));
+
+        ArenaRevocationController controller = new ArenaRevocationController(tracker, bus, id -> false);
+
+        UUID instanceId = UUID.randomUUID();
+        UUID playerId = UUID.randomUUID();
+        controller.revoke(instanceId, playerId, new ResourceId("legendary", "rule_violation"));
+
+        assertFalse(tracker.isRevoked(instanceId, playerId), "tracker should not mark revoked");
+        assertFalse(seen.get(), "should not emit ParticipationRevokedEvent");
+
+        sub.unsubscribe();
+    }
+}