How to run all JUnit tests in a category/suite with Ant?

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Right, I got it working with <batchtest> quite simply:

<junit showoutput="true" printsummary="yes" fork="yes">
    <formatter type="xml"/>
    <classpath refid="test.classpath"/>
    <batchtest todir="${test.reports}">
        <fileset dir="${classes}">
            <include name="**/FastTestSuite.class"/>
        </fileset>
    </batchtest>
</junit>

I had tried <batchtest> earlier, but had made the silly mistake of using "**/FastTestSuite.java" instead of "**/FastTestSuite.class" in the <include> element… Sorry about that 🙂

NB: it’s necessary to set fork="yes" (i.e., run the tests in a separate VM); otherwise this will also produce “initializationError” at java.lang.reflect.Constructor.newInstance(Constructor.java:513) like <test> (see comments on the question). However, I couldn’t get <test> working even with fork="yes".

The only shortcoming is that this produces just one JUnit XML report file (TEST-fi.foobar.FastTestSuite.xml) which makes it look like all the (hundreds) of tests are in one class (FastTestSuite). If anyone knows how to tweak this to show the tests in their original classes & packages, please let me know.

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