How to configure IntelliJ for running test with JUnit 4?

Should be simple but I couldn't figure it out.

When running my unit test inside IntelliJ, I could not find a way to tell IntelliJ-9.0 that it should use JUnit4 instead of JUnit3.

When a test fails, IntelliJ console displays:

MyTests开发者_如何转开发.testConstraints(MyTests.groovy:20) at

...

com.intellij.junit3.JUnit3IdeaTestRunner.doRun(JUnit3IdeaTestRunner.java:108) at com.intellij.junit3.JUnit3IdeaTestRunner.startRunnerWithArgs(JUnit3IdeaTestRunner.java:42) ...

Do you know how to replace JUnit3 by JUnit4 ?

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I found it!

1. Go to Run/Debug Configurations
2. Add new configuration and choose a JUnit
3. In the configuration tab, add "-junit4" to the Test run parameters input field

And that's done !

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You can annotate your test class with an annotation to indicate junit the runner it will use

@RunWith(JUnit4.class) MyTestClass {} 

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I tried to put:

@RunWith(JUnit4.class) 

at the beginning of a test. IntelliJ complained about this, but asked to 'load' JUnit4.class. So I deleted @RunWith(JUnit4.class). But the 'loading' seems to have fixed the problem - @Ignore is now respected!

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Put the JUnit 4 JAR in your CLASSPATH and see if IntelliJ picks it up.

The JUnit plug-in appears to run either version 3 or 4.

I'll bet that it has to do with the way you're writing your JUnit tests. Post one to confirm. If you use the JUnit 4 style, I'll bet IntelliJ would run it properly.

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'com.intellij.junit3' package belongs to IDEA binaries, not to junit3 or junit4. So, the question itself seems to be incorrect in essence - there is no difference in what package name is used by IDEA codebase internally if it correctly executes the tests.

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It sounds like the real problem may be that you are trying to use junit 4 with a grails version less than 1.3. Grails 1.2.x and lower only support Junit 3 tests. Grails 1.3 will finally have junit 4 support. This was discussed on stackoverflow link text

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I had the same problem with a java app inside 10.5, and it turned out to be my Project language level set to 5.0 as opposed to 8.0.

To change this go to File->Project Structure->Project->Project language level

And change this to the required level. Not sure at which level you can use JUnit4, but setting this to 5.0 will make it use JUnit3. Setting it to 8.0 makes it use JUnit4