WELD-2697 Add tests for ObserverMethod.getDeclaringBean

tests-arquillian/src/test/java/org/jboss/weld/tests/observers/metadata/EventPayload.java

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+/*
+ * JBoss, Home of Professional Open Source
+ * Copyright 2022, Red Hat, Inc., and individual contributors
+ * by the @authors tag. See the copyright.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jboss.weld.tests.observers.metadata;
+
+public class EventPayload {
+}

tests-arquillian/src/test/java/org/jboss/weld/tests/observers/metadata/FirstObserver.java

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+/*
+ * JBoss, Home of Professional Open Source
+ * Copyright 2022, Red Hat, Inc., and individual contributors
+ * by the @authors tag. See the copyright.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jboss.weld.tests.observers.metadata;
+
+import jakarta.annotation.Priority;
+import jakarta.enterprise.context.Dependent;
+import jakarta.enterprise.event.Observes;
+import jakarta.enterprise.inject.Alternative;
+
+@Dependent
+@Alternative
+@Priority(1)
+public class FirstObserver {
+
+    public static boolean OBSERVER_NOTIFIED = false;
+
+    public void observe(@Observes EventPayload ep) {
+        OBSERVER_NOTIFIED = true;
+    }
+}

tests-arquillian/src/test/java/org/jboss/weld/tests/observers/metadata/ObserverDeclaringBeanTest.java

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+/*
+ * JBoss, Home of Professional Open Source
+ * Copyright 2022, Red Hat, Inc., and individual contributors
+ * by the @authors tag. See the copyright.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jboss.weld.tests.observers.metadata;
+
+import jakarta.enterprise.context.Dependent;
+import jakarta.enterprise.inject.spi.Bean;
+import jakarta.enterprise.inject.spi.BeanManager;
+import jakarta.enterprise.inject.spi.Extension;
+import jakarta.enterprise.inject.spi.ObserverMethod;
+import jakarta.inject.Inject;
+import org.jboss.arquillian.container.test.api.Deployment;
+import org.jboss.arquillian.junit.Arquillian;
+import org.jboss.shrinkwrap.api.Archive;
+import org.jboss.shrinkwrap.api.BeanArchive;
+import org.jboss.shrinkwrap.api.ShrinkWrap;
+import org.jboss.weld.test.util.Utils;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Set;
+
+/**
+ * Tests metadata obtainable for a given observer method
+ */
+@RunWith(Arquillian.class)
+public class ObserverDeclaringBeanTest {
+
+    @Deployment
+    public static Archive<?> deploy() {
+        return ShrinkWrap.create(BeanArchive.class, Utils.getDeploymentNameAsHash(ObserverDeclaringBeanTest.class))
+                .addAsServiceProvider(Extension.class, ObserverRegisteringExtension.class)
+                .addPackage(ObserverDeclaringBeanTest.class.getPackage());
+    }
+
+    @Inject
+    BeanManager bm;
+
+    @Test
+    public void testMetadataForStandardEvent() {
+        EventPayload payload = new EventPayload();
+        Assert.assertFalse(FirstObserver.OBSERVER_NOTIFIED);
+        bm.getEvent().fire(payload);
+        Assert.assertTrue(FirstObserver.OBSERVER_NOTIFIED);
+
+        Set<ObserverMethod<? super EventPayload>> observerMethods = bm.resolveObserverMethods(payload);
+        Assert.assertTrue(observerMethods.size() == 1);
+        Bean<?> declaringBean = observerMethods.iterator().next().getDeclaringBean();
+        Assert.assertTrue(declaringBean.isAlternative());
+        Assert.assertEquals(Dependent.class, declaringBean.getScope());
+        Assert.assertEquals(FirstObserver.class, declaringBean.getBeanClass());
+    }
+
+    // specification doesn't say what should happen in this case, the behavior is Weld-specific
+    @Test
+    public void testMetadataForSyntheticEvent() {
+        String stringLoad = "payload";
+
+        Assert.assertEquals(0, ObserverRegisteringExtension.TIMES_OBSERVERS_NOTIFIED);
+        bm.getEvent().fire(stringLoad);
+        Assert.assertEquals(1, ObserverRegisteringExtension.TIMES_OBSERVERS_NOTIFIED);
+
+        Set<ObserverMethod<? super Object>> observerMethods = bm.resolveObserverMethods(stringLoad);
+        Assert.assertTrue(observerMethods.size() == 1);
+        Assert.assertNull(observerMethods.iterator().next().getDeclaringBean());
+    }
+}

tests-arquillian/src/test/java/org/jboss/weld/tests/observers/metadata/ObserverRegisteringExtension.java

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+/*
+ * JBoss, Home of Professional Open Source
+ * Copyright 2022, Red Hat, Inc., and individual contributors
+ * by the @authors tag. See the copyright.txt in the distribution for a
+ * full listing of individual contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jboss.weld.tests.observers.metadata;
+
+import jakarta.enterprise.event.Observes;
+import jakarta.enterprise.inject.spi.AfterBeanDiscovery;
+import jakarta.enterprise.inject.spi.Extension;
+
+public class ObserverRegisteringExtension implements Extension {
+
+    public static int TIMES_OBSERVERS_NOTIFIED = 0;
+
+    public void register(@Observes AfterBeanDiscovery afterBeanDiscovery) {
+        // synth observer, its declaring bean will be null
+        afterBeanDiscovery.addObserverMethod().observedType(String.class)
+                .notifyWith(eventContext -> TIMES_OBSERVERS_NOTIFIED++);
+    }
+}