using junit 4 in grails

Question

I'd like to use some JUnit 4 functionality in my grails testing, but currently grails tests run under JUnit 3. JUnit 4 can be used from groovy but replacing the JUnit jar within grails with a JUnit 4 one doesn't seem to enable the functionality I'm looking for.

Anyone know how I can get grails to run my tests with junit 4?

Answer 1

You can use JUnit 4 with Grails as long as you're using Groovy 1.5+ and Java 5+:

http://groovy.codehaus.org/Using+JUnit+4+with+Groovy

Answer 2

Grails does not support JUnit 4. They're looking into supporting it in Grails 1.3. You can force a dependency on JUnit 4, but the Grails tools might ignore your tests, run them incorrectly, or you might see other weird side effects.

To force a JUnit 4 dependency (at your own risk), open your grails-app/conf/BuildConfig.groovy file. In that file, modify the dependencies and inherits sections to include the following:

inherits("globals") { 
  excludes "junit" 
}

dependencies { 
  test "junit:junit:4.7" 
}

Then, in SpringSource Tool Suite, right-click your project and select Grails Tools -> Refresh Dependencies. This should replace junit 3.8.1 in your Grails Dependencies with junit 4.7.

Answer 3

Starting with Grails 1.3M1, JUnit 4 is onboard: http://www.grails.org/1.3-M1+Release+Notes