/*
 * Copyright 2005-2010 the original author or authors.
 * 
 * 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.wamblee.ioc;

import junit.framework.TestCase;

/**
 * Tests the bean kernel. The lookup of the bean factory itself can be tested
 * only partially. Using a global property file for all test cases would tie all
 * test cases together therefore no global property file is used.
 * 
 * @author Erik Brakkee
 */
public class BeanKernelTest extends TestCase {
    /**
     * Loads the bean factory based on a property file configuration. Verifies
     * the correct bean factory is loaded.
     * 
     */
    public void testLoadBeanFactoryFromProperties() {
        BeanFactory factory = BeanKernel
            .lookupBeanFactory("org/wamblee/general/beankernel.properties");
        assertTrue(factory instanceof TestBeanFactory);
    }

    /**
     * Loads the bean factory based on a non-existing property file. Verifies
     * that BeanFactoryException is thrown.
     * 
     */
    public void testNonExistentPropertyFile() {
        try {
            BeanKernel
                .lookupBeanFactory("org/wamblee/general/beankernel-nonexistent.properties");
        } catch (BeanFactoryException e) {
            return; // ok
        }

        fail();
    }

    /**
     * Loads the bean factory based on a property file with a non-existing bean
     * factory defined in it. Verifies that BeanFactoryException is thrown.
     * 
     */
    public void testNonExistentBeanFactory() {
        try {
            BeanKernel
                .lookupBeanFactory("org/wamblee/general/beankernel-wrong.properties");
        } catch (BeanFactoryException e) {
            return; // ok
        }

        fail();
    }

    /**
     * Retrieves a bean factory throug the bean kernel. Verifies that beans can
     * be retrieved.
     * 
     */
    public void testRetrieveFactory() {
        BeanKernel.overrideBeanFactory(new TestBeanFactory()); // bypass
        // default
        // property
        // lookup

        BeanFactory factory = BeanKernel.getBeanFactory();
        assertNotNull(factory);
        assertEquals("hello", factory.find(String.class));
    }
}