(二).测试类：

package com.tide.test;

import junit.framework.*;

import com.tide.prac.*;

public class TestCar extends TestCase {

private Car carObj;

protected void setUp() throws java.lang.Exception{

super.setUp();

if(carObj == null){

carObj = new Car();

}

}

protected void tearDown() throws java.lang.Exception{

super.tearDown();

carObj = null;

}

public static TestSuite suite() {

return new TestSuite(TestCar.class);

}

public static void main (String[] args) {

junit.textui.TestRunner.run(suite());

}

//以下是具体的测试代码

public void testGetWheels(){

int wheelsExpect，wheelsActual;

wheelsExpect = 4;

wheelsActual = carObj.getWheels();

assertEquals(wheelsExpect，wheelsActual);

//下面是故意制造的错误

wheelsExpect = 5;

wheelsActual = carObj.getWheels();

assertEquals(wheelsExpect，wheelsActual);

}

}