ConnectionTest.java

package com.coderising.download.test;

import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import com.coderising.download.api.Connection;
import com.coderising.download.api.ConnectionManager;
import com.coderising.download.impl.ConnectionManagerImpl;

public class ConnectionTest {
	
	@Before
	public void setUp() throws Exception {
	}

	@After
	public void tearDown() throws Exception {
	}

	@Test
	//测试连接url的功能
	public void testContentLength() throws Exception{
		//new一个接口，然后实现这个接口
		ConnectionManager connMan = new ConnectionManagerImpl();
		Connection conn = connMan.open("http://www.hinews.cn/pic/0/13/91/26/13912621_821796.jpg");		
		Assert.assertEquals(35470, conn.getContentLength());
	}
	
	@Test
	//测试读入，确保设计的接口ok
	public void testRead() throws Exception{
		
		ConnectionManager connMan = new ConnectionManagerImpl();
		Connection conn = connMan.open("http://www.hinews.cn/pic/0/13/91/26/13912621_821796.jpg");
		
		byte[] data = conn.read(0, 35469);
		
		Assert.assertEquals(35470, data.length);
		
		data = conn.read(0, 1023);
		
		Assert.assertEquals(1024, data.length);
		
		data = conn.read(1024, 2023);
		
		Assert.assertEquals(1000, data.length);
		
		
		// 测试不充分，没有断言内容是否正确
	}
	
	
	
	
}