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;
    }
}

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() {
        
    }
}

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() {
        
    }
}

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() {
        
    }
}

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 {
    
}

　　

　　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