Not run Scenario in worker when have big DataProvider

[Yasuslik]

❌ run-workers Fails When Using Data-Driven Tests (Data().Scenario) with Large Data Sets

Description

When running tests using CodeceptJS workers with the following command:

npx codeceptjs run-workers --suites 5

Tests using the Data(events.event19.cases).Scenario(...) structure do not execute properly.
However, if I reduce the amount of data in one test case, the test runs successfully.

---

Steps to Reproduce

1. Run tests with multiple suites using run-workers:

   npx codeceptjs run-workers --suites 5

2. Use a data-driven scenario:

   Data(events.event19.cases).Scenario(
     'Користувач натиснув на “Указать”',
     async ({ I, commentsPage, current }) => {
       I.setCookie(current.cookies);
       commentsPage.openCommentsPage(events.common.article);
       I.waitForVisible(commentsPage.enterButton);
       await I.clearInterceptedRequests();
       I.click(commentsPage.enterButton);
       I.waitForInvisible(commentsPage.authenticatedOverlayTitleText);
       I.see(current.text, commentsPage.authenticatedOverlayDiv);
     }
   );

3. If I reduce the data in events.event19.cases, the test runs successfully.

---

Expected Behavior

✅ Tests should run correctly in parallel mode (run-workers), regardless of the data size.

Actual Behavior

❌ Tests fail silently, with no errors in the output.

• No error message is displayed.
• Running npx codeceptjs run --debug does not show any issues.
• The test suite skips execution without failing explicitly.

---

Data Example (Fails with Larger Data Set)

Here is an example of my test data:

event19: {
  cases: [
    {
      testName: 'event19 Користувач натиснув на “Указать”',
      cookies: [
        { name: 'refresh_token', value: JWTTokenRefresh, domain: '.example.com', path: '/' },
        { name: 'token', value: JWTGoogleAccess, domain: '.example.com', path: '/' },
      ],
      text: 'Вам будет отправлено СМС с кодом подтверждения.',
      event: {
        url: '.example.com',
        method: 'POST',
        event_type: 'tap',
        postData: {
          event_type: 'tap',
          event_target: 'set_button',
          event_target_component: 'nickname_phone_number_absent_widget',
          event_target_layout_section: 'right_drawer',
          feature: 'user_profile',
        },
      },
    },
    // Additional test cases...
  ],
}

If I remove some properties or reduce the size of postData, the test starts working.

---

Verbose Output

TypeScript Definitions provide autocompletion in Visual Studio Code and other IDEs
Definitions were generated in steps.d.ts
CodeceptJS v3.7.2 #StandWithUkraine
Running tests in 5 workers...

***************************************
nodeInfo:  20.18.0
osInfo:  macOS 15.3
cpuInfo:  (8) arm64 Apple M1 Pro
chromeInfo:  133.0.6943.141
edgeInfo:  120.0.2210.61
firefoxInfo:  undefined
safariInfo:  18.3
If you need more detailed info, just run this: npx codeceptjs info
***************************************
CodeceptJS v3.7.2 #StandWithUkraine
Using test root "/Users/r-bondarenko/Project/QA-codecept/config"
Helpers: Playwright, REST, JSONResponse, ChaiWrapper, InterceptHelper, ResponseHelper, TestHelper, MongoHelper, WebsiteHelper
Plugins: screenshotOnFail


  OK  | 0 passed   // 0ms

No tests found by pattern: /@commentsSusl/
CodeceptJS v3.7.2 #StandWithUkraine
Using test root "/Users/r-bondarenko/Project/QA-codecept/config"
Helpers: Playwright, REST, JSONResponse, ChaiWrapper, InterceptHelper, ResponseHelper, TestHelper, MongoHelper, WebsiteHelper
Plugins: screenshotOnFail


  OK  | 0 passed   // 0ms

No tests found by pattern: /@commentsSusl/
CodeceptJS v3.7.2 #StandWithUkraine
Using test root "/Users/r-bondarenko/Project/QA-codecept/config"
Helpers: Playwright, REST, JSONResponse, ChaiWrapper, InterceptHelper, ResponseHelper, TestHelper, MongoHelper, WebsiteHelper
Plugins: screenshotOnFail

CodeceptJS v3.7.2 #StandWithUkraine
Using test root "/Users/r-bondarenko/Project/QA-codecept/config"
Helpers: Playwright, REST, JSONResponse, ChaiWrapper, InterceptHelper, ResponseHelper, TestHelper, MongoHelper, WebsiteHelper
Plugins: screenshotOnFail


  OK  | 0 passed   // 0ms

No tests found by pattern: /@commentsSusl/

Maybe you wanted to run one of these tests?
☐ @regression @smoke @commentsBlock: Check and approve comment in recipe
☐ @regression @smoke @commentsBlock: Check and approve comment in article | {"5000003"}
☐ @regression @smoke @commentsBlock: Check and approve comment in article | {"5000007"}
☐ @regression @smoke @commentsBlock: Check and approve comment with 1 symbol in article | {"5000003"}
☐ @regression @smoke @commentsBlock: Check and approve comment with 1 symbol in article | {"5000007"}
☐ @regression @smoke @commentsBlock: Check and approve comment with 2700 symbols in article | {"5000003"}
☐ @regression @smoke @commentsBlock: Check and approve comment with 2700 symbols in article | {"5000007"}

To run the first test use the following command:
npx codeceptjs run --debug --grep "@regression @smoke @commentsBlock: Check and approve comment in recipe"

  OK  | 0 passed   // 0ms

No tests found by pattern: /@commentsSusl/
CodeceptJS v3.7.2 #StandWithUkraine
Using test root "/Users/r-bondarenko/Project/QA-codecept/config"
Helpers: Playwright, REST, JSONResponse, ChaiWrapper, InterceptHelper, ResponseHelper, TestHelper, MongoHelper, WebsiteHelper
Plugins: screenshotOnFail


  OK  | 0 passed   // 0ms

🔹 No explicit error message appears.
🔹 Tests are not running, but are also not failing.

---

Environment

Property	Value
OS	macOS 15.3
Node.js	v20.18.0
CodeceptJS	v3.7.2
Browser	Chromium 133.0.6943.141
Helpers	Playwright, REST, JSONResponse, ChaiWrapper, InterceptHelper, ResponseHelper, TestHelper, MongoHelper, WebsiteHelper
Plugins	screenshotOnFail

---

Possible Causes

• Memory allocation issue when handling large test data.
• run-workers doesn't handle large JSON objects correctly in Data().Scenario().
• Test case names may be too long when using testName as a dynamic string.
• CodeceptJS parallel execution doesn't support deep JSON structures well in data-driven tests.