Mochawesome/Testomatio/junit reporter: run-workers: Running of test with --suite doesn't aggregate results from all suites per browser

Start with codecept.conf.ts and reproduce the issue using codeceptjs run-workers 3 dev --by suite --reporter mocha-multi against SuiteA_test.ts and SuiteB_test.ts. Trace how worker results reach the configured Mochawesome and mocha-junit-reporter output paths; done means console.log, HTML, JSON, and XML artifacts for both chromium and firefox contain both suites.

The issue is even in older versions, e.g. in 3.5.3. Retested with the latest 3.7.6 and the issue persists.

• npm i mochawesome
• npm i mocha-junit-reporter
• npm i mocha-multi
• Run the tests codeceptjs run-workers 3 dev --by suite --reporter mocha-multi (parallelization per browser and per suite). Another variant is --suites instead of --by suite, but it behaves the same way.

$ codeceptjs run-workers 3 dev --by suite --reporter mocha-multi
CodeceptJS v3.7.6 #StandWithUkraine
Running tests in 3 workers...

[Worker 03]   ✔ SuiteB › Scenario 1 in 4ms
[Worker 03]   ✔ SuiteB › Scenario 2 in 1ms
[Worker 01]   ✔ SuiteA › Scenario 1 in 5ms
[Worker 01]   ✔ SuiteA › Scenario 2 in 1ms
[Worker 02]   ✔ SuiteA › Scenario 1 in 3ms
[Worker 02]   ✔ SuiteA › Scenario 2 in 1ms
[Worker 04]   ✔ SuiteB › Scenario 1 in 4ms
[Worker 04]   ✔ SuiteB › Scenario 2 in 1ms

  OK  | 8 passed   // 3s

Expected result:

• output/console.log contains data from both test suites
• output/dev_chromium1/report.html contains data from both test suites
• output/dev_chromium1/report.json contains data from both test suites
• output/dev_chromium1/result.xml contains data from both test suites
• output/dev_firefox1/report.html contains data from both test suites
• output/dev_firefox1/report.json contains data from both test suites
• output/dev_firefox1/result.xml contains data from both test suites

This way it works with run-multiple (parallelization per browser, but test suites are run in sequence) ✔️

Actual result:

• All the mentioned files contains data from the SuiteA only. The SuiteB is missing there 🐞 . A problem seems to be that test suites overwrite each other's results when running in threads.

Config codecept.conf.ts:

import { setHeadlessWhen, setCommonPlugins } from "@codeceptjs/configure";
// turn on headless mode when running with HEADLESS=true environment variable
// export HEADLESS=true && npx codeceptjs run
setHeadlessWhen(process.env.HEADLESS);

// enable all common plugins https://github.com/codeceptjs/configure#setcommonplugins
setCommonPlugins();

export const config: CodeceptJS.MainConfig = {
  tests: "./*_test.ts",
  output: "./output",
  helpers: {
    Playwright: {
      browser: "chromium",
      url: "http://localhost",
      show: true,
    },
    Mochawesome: {
      uniqueScreenshotNames: true,
    },
  },
  include: {
    I: "./steps_file",
  },
  multiple: {
    dev: {
      browsers: [
        {
          browser: "chromium",
          outputName: "chromium",
        },
        {
          browser: "firefox",
          outputName: "firefox",
        },
      ],
    },
  },
  mocha: {
    reporterOptions: {
      "codeceptjs-cli-reporter": {
        stdout: "-",
        options: {
          verbose: true,
          debug: true,
          steps: true,
        },
      },
      mochawesome: {
        stdout: "./output/console.log",
        options: {
          reportDir: "./output",
          reportFilename: "report",
        },
      },
      "mocha-junit-reporter": {
        stdout: "./output/console.log",
        options: {
          mochaFile: "./output/result.xml",
          jenkinsMode: true,
          attachments: true, //add screenshot for a failed test
        },
      },
    },
  },

  name: "my",
};

Test suites:

SuiteA_test.ts

Feature("SuiteA");

Scenario("Scenario 1", ({ I }) => {
  I.say("Executing Scenario 1 in Suite A");
});

Scenario("Scenario 2", ({ I }) => {
  I.say("Executing Scenario 2 in Suite A");
});

SuiteB_test.ts

Feature("SuiteB");

Scenario("Scenario 1", ({ I }) => {
  I.say("Executing Scenario 1 in Suite B");
});

Scenario("Scenario 2", ({ I }) => {
  I.say("Executing Scenario 2 in Suite B");
});

Used SW:

• CodeceptJS 3.7.6
• mochawesome 7.1.4
• mocha-junit-reporter 2.2.1
• mocha-multi 1.1.7