JUnit异常测试 [英] JUnit Exception Testing

问题描述

编辑：此时不能使用JUnit 4。

Not JUnit 4 available at this time.

您好，

我有一个关于使用JUnit进行智能异常测试的问题。在这个时候，我这样做：

I have a question about "smart" exception testing with JUnit. At this time, I do it like this:

public void testGet() {

    SoundFileManager sfm = new SoundFileManager();

        // Test adding a sound file and then getting it by id and name.
        try {
            SoundFile addedFile = sfm.addSoundfile("E:\\Eclipse_Prj\\pSound\\data\\Adrenaline01.wav");
            SoundFile sf = sfm.getSoundfile(addedFile.getID());
            assertTrue(sf!=null);
            System.out.println(sf.toString());

            sf = sfm.getSoundfileByName("E:\\Eclipse_Prj\\pSound\\data\\Adrenaline01.wav");
            assertTrue(sf!=null);
            System.out.println(sf.toString());
        } catch (RapsManagerException e) {
            System.out.println(e.getMessage());
        }

        // Test get with invalid id. 
        try {
            sfm.getSoundfile(-100);
            fail("Should have raised a RapsManagerException");
        } catch (RapsManagerException e) {
            System.out.println(e.getMessage());
        }

        // Test get by name with invalid name
        try {
            sfm.getSoundfileByName(new String());
            fail("Should have raised a RapsManagerException");
        } catch (RapsManagerException e) {
            System.out.println(e.getMessage());
        }

    }

如你所见，我需要每个应该抛出异常的函数都有一个try / catch块。似乎不是一个很好的方法，或者是没有可能减少使用try / catch？

As you can see, I need one try/catch block for each function that is supposed to throw an exception. It seems not to be a good way to do this - or is there no possibility to reduce the use of try/catch?

推荐答案

我建议你需要将 testGet 分解成多个单独的测试。个别的try / catch块似乎是相互独立的。您可能还想将共同的初始化逻辑提取到自己的设置方法中。

I suggest that you need to break up testGet into multiple separate tests. The individual try/catch blocks seem to be pretty independent of each other. You may also want to extract the common initialization logic into its own setup method.

一旦你有了，你可以使用JUnit4的异常注释支持，如下所示： p>

Once you have that, you can use JUnit4's exception annotation support, something like this:

public class MyTest {

private SoundManager sfm;

@Before
public void setup() {
      sfm = new SoundFileManager();
}

@Test
public void getByIdAndName() {
  // Test adding a sound file and then getting it by id and name.
      SoundFile addedFile =              
      sfm.addSoundfile("E:\\Eclipse_Prj\\pSound\\data\\Adrenaline01.wav");
      SoundFile sf = sfm.getSoundfile(addedFile.getID());
      assertTrue(sf!=null);
      System.out.println(sf.toString());

      sf = sfm.getSoundfileByName("E:\\Eclipse_Prj\\pSound\\data\\Adrenaline01.wav");
      assertTrue(sf!=null);
      System.out.println(sf.toString());
}

@Test(expected=RapsManagerException.class)
public void getByInvalidId() {
      // Test get with invalid id. 
      sfm.getSoundfile(-100);
}

@Test(expected=RapsManagerException.class)
public void getByInvalidName() {
      // Test get with invalid id. 
      sfm.getSoundfileByName(new String());
}
}

这篇关于JUnit异常测试的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！