ClassAssetTestCase.java

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2009, Red Hat Middleware LLC, 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.shrinkwrap.api.asset;

import java.io.InputStream;

import org.junit.Assert;
import org.junit.Test;

/**
 * Test to ensure that we are able to use Classes as Resources.
 * 
 * https://jira.jboss.org/jira/browse/TMPARCH-5
 * 
 * @author <a href="mailto:aslak@conduct.no">Aslak Knutsen</a>
 * 
 */
public class ClassAssetTestCase {

    @Test
    public void shouldBeAbleToReadThisClass() throws Exception {
        Class<?> clazz = ClassAssetTestCase.class;
        Asset asset = new ClassAsset(clazz);
        InputStream io = asset.openStream();

        Assert.assertNotNull(io);
        Assert.assertEquals("Loaded class should have the same size", ApiTestUtils.findLengthOfStream(io),
            ApiTestUtils.findLengthOfClass(clazz));
    }

    /**
     * https://jira.jboss.org/jira/browse/TMPARCH-19 <br/>
     * <br/>
     * A {@link Class} loaded by the Bootstrap ClassLoader will return a null {@link ClassLoader}, should use
     * {@link Thread} current context {@link ClassLoader} instead.
     * 
     * @throws Exception
     */
    @Test
    public void shouldBeAbleAddBootstrapClass() throws Exception {
        Class<?> bootstrapClass = Class.class;
        Asset asset = new ClassAsset(bootstrapClass);
        InputStream io = asset.openStream();

        Assert.assertNotNull(io);
        Assert.assertEquals("Loaded class should have the same size", ApiTestUtils.findLengthOfStream(io),
            ApiTestUtils.findLengthOfClass(bootstrapClass));
    }

    @Test
    public void shouldThrowExceptionOnNullClass() throws Exception {
        try {
            new ClassAsset(null);
            Assert.fail("Should have thrown IllegalArgumentException");
        } catch (Exception e) {
            Assert.assertEquals("A null clazz argument should result in a IllegalArgumentException",
                IllegalArgumentException.class, e.getClass());
        }
    }
    
    @Test
    public void shouldBeAbleToReturnThisClass() throws Exception {
        final Class<?> clazz = ClassAssetTestCase.class;
        final Asset asset = new ClassAsset(clazz);
        
        Assert.assertTrue(clazz.getName().equals(((ClassAsset)asset).getSource().getName()));
    }
}