Asynchronous tests or hooks not properly completing or resolving their promises

Oct 13, 2025 by wbrum.org 57 views

Failing Test: Chrome X-Pack UI Functional Tests.x-pack/test/functional/apps/infra/hosts_view·ts - InfraOps App Metrics UI Hosts View #With data "after all" hook in "#With data"

Introduction

Optimizing and troubleshooting test failures is a crucial aspect of ensuring the reliability and stability of software applications. In this article, we will delve into the details of a failed test case, Chrome X-Pack UI Functional Tests.x-pack/test/functional/apps/infra/hosts_view·ts - InfraOps App Metrics UI Hosts View #With data "after all" hook in "#With data", and explore the possible causes and solutions for this issue.

Test Failure Details

The test failure occurred on a tracked branch, indicating that the issue is related to the code changes made in that branch. The error message suggests that the test timed out after 360 seconds, which is a significant amount of time. This timeout error is often caused by asynchronous tests or hooks that do not properly complete or resolve their promises.

Error: Timeout of 360000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (/opt/buildkite-agent/builds/bk-agent-prod-gcp-1741892291175036610/elastic/kibana-on-merge/kibana/x-pack/test/functional/apps/infra/hosts_view.ts)
    at listOnTimeout (node:internal/timers:581:17)
    at processTimers (node:internal/timers:519:7) {
  code: 'ERR_MOCHA_TIMEOUT',
  timeout: 360000,
  file: '/opt/buildkite-agent/builds/bk-agent-prod-gcp-1741892291175036610/elastic/kibana-on-merge/kibana/x-pack/test/functional/apps/infra/hosts_view.ts'
}

First Failure

The first failure of this test case occurred in the kibana-on-merge - 9.0 build. This indicates that the issue is likely related to the changes made in that build.

Possible Causes

There are several possible causes for this test failure:

Asynchronous tests or hooks not properly completing or resolving their promises: This is the most likely cause of the timeout error. The test or hook may be taking too long to complete, causing the timeout error.
Incorrect use of the "done()" function: The "done()" function is used to signal the completion of an asynchronous test or hook. If this function is not called correctly, it can cause the test to timeout.
Promise not resolving: If a promise is not resolving correctly, it can cause the test to timeout.

Solutions

To resolve this issue, we can try the following solutions:

Review the test code: Review the test code to ensure that it is properly completing or resolving its promises.
Use the "done()" function correctly: Ensure that the "done()" function is called correctly in the test or hook.
Check for promise resolution: Check that the promise is resolving correctly and not causing the test to timeout.

Best Practices

To avoid similar test failures in the future, we can follow these best practices:

Write tests that are properly asynchronous: Ensure that tests are written to handle asynchronous code correctly.
Use the "done()" function correctly: Use the "done()" function correctly to signal the completion of asynchronous tests or hooks.
Check for promise resolution: Check that promises are resolving correctly to avoid test timeouts.

Conclusion

In conclusion, the failed test case, Chrome X-Pack UI Functional Tests.x-pack/test/functional/apps/infra/hosts_view·ts - InfraOps App Metrics UI Hosts View #With data "after all" hook in "#With data", is likely caused by an asynchronous test or hook not properly completing or resolving its promises. By reviewing the test code, using the "done()" function correctly, and checking for promise resolution, we can resolve this issue and ensure the reliability and stability of our software application.
Failing Test: Chrome X-Pack UI Functional Tests.x-pack/test/functional/apps/infra/hosts_view·ts - InfraOps App Metrics UI Hosts View #With data "after all" hook in "#With data" - Q&A

Introduction

In our previous article, we explored the details of a failed test case, Chrome X-Pack UI Functional Tests.x-pack/test/functional/apps/infra/hosts_view·ts - InfraOps App Metrics UI Hosts View #With data "after all" hook in "#With data". In this article, we will answer some frequently asked questions related to this test failure.

Q&A

Q: What is the cause of the timeout error in this test case?

A: The timeout error is likely caused by an asynchronous test or hook not properly completing or resolving its promises.

Q: How can I prevent this test failure in the future?

A: To prevent this test failure, you can review your test code to ensure that it is properly completing or resolving its promises. You can also use the "done()" function correctly to signal the completion of asynchronous tests or hooks.

Q: What is the "done()" function and how is it used?

A: The "done()" function is used to signal the completion of an asynchronous test or hook. It is typically called at the end of the test or hook to indicate that it has completed.

Q: How can I check if a promise is resolving correctly?

A: You can check if a promise is resolving correctly by using the then() method to handle the resolved value. If the promise is not resolving correctly, you can use the catch() method to handle the error.

Q: What are some best practices for writing asynchronous tests?

A: Some best practices for writing asynchronous tests include:

Writing tests that are properly asynchronous
Using the "done()" function correctly to signal the completion of asynchronous tests or hooks
Checking for promise resolution to avoid test timeouts
Using the then() method to handle the resolved value of a promise
Using the catch() method to handle the error of a promise

Q: How can I troubleshoot this test failure?

A: To troubleshoot this test failure, you can:

Review the test code to ensure that it is properly completing or resolving its promises
Use the "done()" function correctly to signal the completion of asynchronous tests or hooks
Check for promise resolution to avoid test timeouts
Use the then() method to handle the resolved value of a promise
Use the catch() method to handle the error of a promise

Conclusion

In conclusion, the failed test case, Chrome X-Pack UI Functional Tests.x-pack/test/functional/apps/infra/hosts_view·ts - InfraOps App Metrics UI Hosts View #With data "after all" hook in "#With data", is likely caused by an asynchronous test or hook not properly completing or resolving its promises. By following the best practices for writing asynchronous tests and troubleshooting this test failure, you can prevent similar test failures in the future and ensure the reliability and stability of your software application.