/*
 * $HeadURL$
 * $Revision$
 * $Date$
 * 
 * ====================================================================
 *
 *  Copyright 1999-2006 The Apache Software Foundation
 *
 *  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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.http.entity;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import org.apache.http.HttpEntity;

/**
 * Unit tests for {@link EntityTemplate}.
 *
 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
 */
public class TestEntityTemplate extends TestCase {

    public TestEntityTemplate(String testName) {
        super(testName);
    }

    public static void main(String args[]) {
        String[] testCaseName = { TestEntityTemplate.class.getName() };
        junit.textui.TestRunner.main(testCaseName);
    }

    public static Test suite() {
        return new TestSuite(TestEntityTemplate.class);
    }

    public void testBasics() throws Exception {

        HttpEntity httpentity = new EntityTemplate(new ContentProducer() {

            public void writeTo(final OutputStream outstream) throws IOException {
                outstream.write('a');
            }
          
        });
        
        assertEquals(-1, httpentity.getContentLength());
        assertTrue(httpentity.isRepeatable());
        assertTrue(httpentity.isStreaming());
    }

    public void testIllegalConstructor() throws Exception {
        try {
            new EntityTemplate(null);
            fail("IllegalArgumentException should have been thrown");
        } catch (IllegalArgumentException ex) {
            // expected
        }
    }

    public void testWriteTo() throws Exception {
        HttpEntity httpentity = new EntityTemplate(new ContentProducer() {

            public void writeTo(final OutputStream outstream) throws IOException {
                outstream.write('a');
            }
          
        });
        
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        httpentity.writeTo(out);
        byte[] bytes2 = out.toByteArray();
        assertNotNull(bytes2);
        assertEquals(1, bytes2.length);
        
        try {
            httpentity.writeTo(null);
            fail("IllegalArgumentException should have been thrown");
        } catch (IllegalArgumentException ex) {
            // expected
        }
    }
    
    public void testConsume() throws Exception {
        HttpEntity httpentity = new EntityTemplate(new ContentProducer() {

            public void writeTo(final OutputStream outstream) throws IOException {
                outstream.write('a');
            }
          
        });
        httpentity.consumeContent(); // Has no effect
        try {
            httpentity.getContent();
            fail("UnsupportedOperationException should have been thrown");
        } catch (UnsupportedOperationException ex) {
            // expected
        }
        
    }
        
}