MutationResult.getSucceedingTests() always returns empty list

Trying to write a MutationResultListener to generate specific reports. My class extends org.pitest.mutationtest.MutationResultListener .

In the handleMutationResult(ClassMutationResults results) method, I tried the following:

for (MutationResult mutation : results.getMutations()) {
    List<String> succedingTests = mutation.getSucceedingTests();
    for(String succedingtest : succedingTests) {
        out.println("Succeeding test:" + succedingtest);
    }
    List<String> killingTests = mutation.getKillingTests();
    for(String killingtest : killingTests) {
        out.println("Killing test:" + killingtest);
    }
}

The code is properly called (and getKillingTests() works fine).

But the list returned by getSucceedingTests() is always empty (either mutations are killed, or not, or part of them).

[gibello]

Thanks; The fullMutationMatrix parameter is not documented… but I found it in the release notes. Problem, when set, my listener is never called: I get a message saying “Full mutation matrix is only supported in the output format XML”, so I can’t use any output format of my own.

[victorgveloso]

Yes, it works but… I had to set outputFormats for both my format and XML. outputFormats = ['DetailedCSV','XML']. Otherwise the error “Full mutation matrix is only supported in the output format XML” appears. Searching for this string I found org.pitest.mutationtest.tooling.EntryPoint. There is a method with a hardcoded condition:

private void checkMatrixMode(ReportOptions data) {
    if (data.isFullMutationMatrix() && !data.getOutputFormats().contains("XML")) {
      throw new PitError("Full mutation matrix is only supported in the output format XML.");
    }
  }

It explicitly blocks the use of fullMutationMatrix for ‘XML’-containing outputFormats only.