Question

I’m using Gradle (Milestone 8a) to run JUnit tests on my project with the IBM J9 JVM, which according to “Running tests with JMockit” requires that I pass the argument -javaagent:jmockit.jar to the JVM. However, JMockit isn’t injecting mocked parameters which is causing my tests to fail with “Method (foo) should have no parameters)”. The tests run fine in Eclipse on the HotSpot JVM.

I’ve extended the test task to find the JAR and add the argument to jvmArgs like this:

test {
   doFirst {
     // Don't do this until the task is actually being executed, because 
     // as soon as we call testCompile.find the configuration is resolved and 
     // can't be modified anymore.
     jMockit = project.configurations.testCompile.find {
       it.name.startsWith("jmockit-")
     }
     jvmArgs "-javaagent:${jMockit}"
   }
}

I’ve also added JMockit and JUnit to the testCompile configuration, making sure that JMockit is first, and verified this by running gradle dependencies:

dependencies {
  testCompile 'com.googlecode.jmockit:jmockit:0.999.13'
  testCompile 'junit:junit:4.10'
}

The output of gradle check --debug confirms that the -javaagent parameter is being used:

12:44:14.788 [DEBUG] [org.gradle.process.internal.ProcessBuilderFactory] creating process builder for Gradle Worker 1
12:44:14.788 [DEBUG] [org.gradle.process.internal.ProcessBuilderFactory] in directory /home/bbobby/webapp
12:44:14.788 [DEBUG] [org.gradle.process.internal.ProcessBuilderFactory] with argument#0 = -javaagent:/home/bbobby/.gradle/caches/artifacts-8/filestore/com.googlecode.jmockit/jmockit/0.999.13/jar/a6
ba457e09361f37e386edea176c5ce4fa9ee110/jmockit-0.999.13.jar
12:44:14.789 [DEBUG] [org.gradle.process.internal.ProcessBuilderFactory] with argument#1 = -ea
12:44:14.789 [DEBUG] [org.gradle.process.internal.ProcessBuilderFactory] with argument#2 = -cp
12:44:14.789 [DEBUG] [org.gradle.process.internal.ProcessBuilderFactory] with argument#3 = /home/bbobby/.gradle/caches/1.0-milestone-8a/workerMain/classes
12:44:14.789 [DEBUG] [org.gradle.process.internal.ProcessBuilderFactory] with argument#4 = org.gradle.process.internal.launcher.GradleWorkerMain
12:44:14.816 [DEBUG] [org.gradle.process.internal.DefaultExecHandle] Started Gradle Worker 1.

I’m pretty sure I’ve done everything I’m supposed to. Why are my tests failing to run?

Answer 1

This is http://issues.gradle.org/browse/GRADLE-2189, which is already fixed for the upcoming 1.0-rc-1. You can try out the release candidate today.