Question

is there a way to specify the JVM version in a junit test, when multiple java types are available on an OS ?

I’d like to do something like this:

@JVM=1.5
public void test1(){
   run();
}

@JVM=1.7
public void test2(){
   run();
}

etc..

Answer 1

No, you’ll have to run the JUnit tests multiple times with multiple VMs. You can then use Assume to only run the tests for the correct VM:

public void test1(){
   // not compiled or tested
   Assume.assumeThat(System.getProperty("java.version"), CoreMatchers.startsWith("1.5"));
   run();
}

public void test2(){
   Assume.assumeThat(System.getProperty("java.version"), CoreMatchers.startsWith("1.7"));
   run();
}

Please note that I haven’t compiled this, so there may be errors. Then, in your build tool, run these tests twice in two different VMs.