How to use Node global in tests and custom reporter code?

[laurentsd]

I am trying to store some test information in Node's global object (globalThis) so that I can use it in my custom reporter.
In the test code I set this flag when the testbed cannot be cleaned up:

       globalThis['testStatus'] = {
            hasCleanupFailures: true,
         };

My custom reporter is inspired from the Mocha tutorial: https://mochajs.org/api/tutorial-custom-reporter.html:

class MyReporter {
   constructor(runner, options) {
      const testResultFile = options?.reporterOptions?.testResultFile;

      runner
         .once(EVENT_RUN_BEGIN, () => {
           ...
         })
         .on(EVENT_TEST_PASS, (test) => {
            ...
         })
         .on(EVENT_TEST_FAIL, (test, err) => {
            ...
         })
         .once(EVENT_RUN_END, () => {
            if (globalThis['testStatus']) {
               var output = 'test.hasCleanupFailures=' + globalThis['testStatus'].hasCleanupFailures;
               fs.writeFileSync(testResultFile, output);
            }

         });
   }
}

I don't understand why globalThis['testStatus'] is seen as undefined in the reporter when I can console.log it in the test code. Is it because globalThis is not really global to Node when running the test and executing the reporter? i.e. those are 2 different processes and I need to find another way to share test results in my reporter code?
Thanks for the help!

[laurentsd]

I did check that the test and the reporter were running in two different Node processes which would explain why the global object is not the same. Other than writing into a file I can't think of any easy way to share the results then.