ExceptionHandlingTestCase.java

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
 * as indicated by the @authors tag. All rights reserved.
 * 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.arquillian.core.impl;

import java.util.List;
import org.jboss.arquillian.core.api.Event;
import org.jboss.arquillian.core.api.annotation.Inject;
import org.jboss.arquillian.core.api.annotation.Observes;
import org.jboss.arquillian.core.test.AbstractManagerTestBase;
import org.junit.Assert;
import org.junit.Test;

/**
 * TestCase to ensure a nested observes Exception is only handled once within the call chain.
 * <p>
 * - TestEventFire
 * - TestExceptionThrower
 * - throws Exception
 * - TestExceptionHandler
 * - re throw
 *
 * @author <a href="mailto:aslak@redhat.com">Aslak Knutsen</a>
 * @version $Revision: $
 */
public class ExceptionHandlingTestCase extends AbstractManagerTestBase {
    @Override
    protected void addExtensions(List<Class<?>> extensions) {
        extensions.add(TestEventFire.class);
        extensions.add(TestExceptionThrower.class);
        extensions.add(TestExceptionHandler.class);
    }

    @Test
    public void shouldOnlyFireSameExceptionOnce() throws Exception {
        try {
            fire(new Double(0.0));
        } catch (Exception e) {
            if (!(e instanceof TestException)) {
                Assert.fail("Wrong Exception thrown " + e);
            }
        }

        Assert.assertEquals(new Integer(1), TestEventFire.called);
        Assert.assertEquals(new Integer(1), TestExceptionThrower.called);
        Assert.assertEquals(new Integer(1), TestExceptionHandler.called);
    }

    public static class TestEventFire {
        public static Integer called = 0;

        @Inject
        private Event<Integer> integer;

        public void handle(@Observes Double event) throws Exception {
            called++;
            integer.fire(new Integer(10));
        }
    }

    public static class TestExceptionThrower {
        public static Integer called = 0;

        public void handle(@Observes Integer event) throws Exception {
            called++;
            throw new TestException("_TEST_");
        }
    }

    public static class TestExceptionHandler {
        public static Integer called = 0;

        public void handle(@Observes TestException event) throws Exception {
            called++;
            // Handles exception but re-throws it to specify it's a IllegalException
            throw event;
        }
    }

    public static class TestException extends Exception {
        private static final long serialVersionUID = 1L;

        public TestException(String message) {
            super(message);
        }
    }
}