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Camel unit testing with Spring
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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.test.spring;

import java.lang.reflect.Method;

import org.apache.camel.spring.SpringCamelContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.AnnotationConfigUtils;
import org.springframework.test.context.MergedContextConfiguration;
import org.springframework.test.context.support.DelegatingSmartContextLoader;

/**
 * CamelSpringDelegatingTestContextLoader which fixes issues in Camel's JavaConfigContextLoader. (adds support for
 * Camel's test annotations) 

 * This loader can handle either classes or locations for configuring the context. 

 * NOTE: This TestContextLoader doesn't support the annotation of ExcludeRoutes now.
 *
 * @deprecated use {@link CamelSpringRunner} or {@link CamelSpringBootRunner} instead.
 */
@Deprecated
public class CamelSpringDelegatingTestContextLoader extends DelegatingSmartContextLoader {

    protected final Logger logger = LoggerFactory.getLogger(getClass());

    @Override
    public ApplicationContext loadContext(MergedContextConfiguration mergedConfig) throws Exception {

        Class testClass = getTestClass();

        if (logger.isDebugEnabled()) {
            logger.debug("Loading ApplicationContext for merged context configuration [{}].", mergedConfig);
        }

        // Pre CamelContext(s) instantiation setup
        CamelAnnotationsHandler.handleDisableJmx(testClass);

        try {
            SpringCamelContext.setNoStart(true);
            ConfigurableApplicationContext context = (ConfigurableApplicationContext) super.loadContext(mergedConfig);
            return loadContext(context, testClass);
        } finally {
            CamelAnnotationsHandler.cleanup();
            SpringCamelContext.setNoStart(false);
        }
    }

    /**
     * Performs the bulk of the Spring application context loading/customization.
     *
     * @param  context   the partially configured context. The context should have the bean definitions loaded, but
     *                   nothing else.
     * @param  testClass the test class being executed
     * @return           the initialized (refreshed) Spring application context
     *
     * @throws Exception if there is an error during initialization/customization
     */
    public ApplicationContext loadContext(ConfigurableApplicationContext context, Class testClass)
            throws Exception {

        AnnotationConfigUtils.registerAnnotationConfigProcessors((BeanDefinitionRegistry) context);

        // Post CamelContext(s) instantiation but pre CamelContext(s) start setup
        CamelAnnotationsHandler.handleRouteCoverage(context, testClass, s -> getTestMethod().getName());
        CamelAnnotationsHandler.handleProvidesBreakpoint(context, testClass);
        CamelAnnotationsHandler.handleShutdownTimeout(context, testClass);
        CamelAnnotationsHandler.handleMockEndpoints(context, testClass);
        CamelAnnotationsHandler.handleMockEndpointsAndSkip(context, testClass);
        CamelAnnotationsHandler.handleUseOverridePropertiesWithPropertiesComponent(context, testClass);

        // CamelContext(s) startup
        CamelAnnotationsHandler.handleCamelContextStartup(context, testClass);

        return context;
    }

    /**
     * Returns the class under test in order to enable inspection of annotations while the Spring context is being
     * created.
     * 
     * @return the test class that is being executed
     * @see    CamelSpringTestHelper
     */
    protected Class getTestClass() {
        return CamelSpringTestHelper.getTestClass();
    }

    /**
     * Returns the test method under test.
     *
     * @return the method that is being executed
     * @see    CamelSpringTestHelper
     */
    protected Method getTestMethod() {
        return CamelSpringTestHelper.getTestMethod();
    }

}