JUnit accuracy/failure/stress test区别

　　accuracy test(结果准确性测试)

　　例如，Assert.assertEquals(expected, actual)。

　　如果结果不符合期望则产生failure。说明程序逻辑有问题。

　　failure test(抛出异常测试)

　　expected属性用来指示期望抛出的异常类型。例如，@Test(expected = IllegalArgumentException.class)。

　　如果结果不符合期望则产生failure。说明程序逻辑有问题。

　　stress test(运行时间测试)

　　timeout属性用来指示时间上限，单位是毫秒。例如，@Test(timeout = 300)。

　　如果超时则产生error。说明程序本身性能达不到要求。

　　

　　举个例子

　　

 package edu.zju.cst.Student;

 public class Student {
     private String name;

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }

     public String speak(String stm) {
         try {
             Thread.sleep(400);
         } catch (InterruptedException e) {
             e.printStackTrace();
         }

         return name + ": " + stm;
     }
 }

Student.java

 package edu.zju.cst;

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

 import edu.zju.cst.Student.Student;
 import junit.framework.Assert;

 public class StudentAccuracyTest {
     private Student student;

     @Before
     public void setUp() {
         student = new Student();
         student.setName("Tom");
     }

     @Test
     public void testSpeak() {
         String expected = "Tom: hello";
         String actual = student.speak("hell");
         Assert.assertEquals(expected, actual);
     }

     @After
     public void tearDown() {

     }
 }

StudentAccuracyTest.java

 package edu.zju.cst;

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

 import edu.zju.cst.Student.Student;

 public class StudentFailureTest {
     private Student student;

     @Before
     public void setUp() {
         student = new Student();
         student.setName("Tom");
     }

     @Test(expected = IllegalArgumentException.class)
     public void testSpeak() throws IllegalArgumentException {
         student.speak("hell");
     }

     @After
     public void tearDown() {

     }
 }

StudentFailureTest.java

 package edu.zju.cst;

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

 import edu.zju.cst.Student.Student;

 public class StudentStressTest {
     private Student student;

     @Before
     public void setUp() {
         student = new Student();
         student.setName("Tom");
     }

     @Test(timeout = 300)
     public void testSpeak() {
         student.speak("hell");
     }

     @After
     public void tearDown() {

     }
 }

StudentStressTest.java

 package edu.zju.cst;

 import org.junit.runner.RunWith;
 import org.junit.runners.Suite;
 import org.junit.runners.Suite.SuiteClasses;

 @RunWith(Suite.class)
 @SuiteClasses({StudentAccuracyTest.class, StudentFailureTest.class,
     StudentStressTest.class})
 public class TestSuite {

 }

TestSuite.java

　　

　　参考资料

　　JUnit单元测试的几个规律总结

　　JUnit4：Test注解的两个属性：expected和timeout