ArC: add test for observer of a primitive type

independent-projects/arc/tests/src/test/java/io/quarkus/arc/test/event/primitive/PrimitiveEventTest.java

@@ -0,0 +1,55 @@
+package io.quarkus.arc.test.event.primitive;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import jakarta.enterprise.event.Event;
+import jakarta.enterprise.event.Observes;
+import jakarta.inject.Inject;
+import jakarta.inject.Singleton;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.arc.Arc;
+import io.quarkus.arc.test.ArcTestContainer;
+
+public class PrimitiveEventTest {
+    @RegisterExtension
+    public ArcTestContainer container = new ArcTestContainer(Observer.class, Producer.class);
+
+    @Test
+    public void test() {
+        assertFalse(Observer.primitiveNotified);
+        assertFalse(Observer.wrapperNotified);
+
+        Arc.container().select(Producer.class).get().produce();
+
+        assertTrue(Observer.primitiveNotified);
+        assertTrue(Observer.wrapperNotified);
+    }
+
+    @Singleton
+    static class Observer {
+        static boolean primitiveNotified = false;
+        static boolean wrapperNotified = false;
+
+        void observePrimitive(@Observes int event) {
+            primitiveNotified = true;
+        }
+
+        void observeWrapper(@Observes Integer event) {
+            wrapperNotified = true;
+        }
+    }
+
+    @Singleton
+    static class Producer {
+        @Inject
+        Event<Integer> event;
+
+        void produce() {
+            event.fire(42);
+        }
+    }
+}