The pipeline
- Runs on every push to main
- Ubuntu server with Node.js 16
- Installs dependencies and grants Jest permissions
- Runs the tests and confirms when everything passes
PROGRAMMING · DEVOPS · CI
Jest CI
Continuous integration for a JavaScript project: every change pushed to main runs the tests automatically with GitHub Actions.
JEST CI · 12 / 14- Program
- Computer Programmer · DevOps Tools and Practices course, Lambton College
- Year
- 2024
- Role
- Developer
- Tools
- Jest · GitHub Actions · Node.js 16
// 01 · THE MISSION
The mission
Manual testing takes time and lets bugs slip through. In this project I set up continuous integration for a JavaScript application: whenever a change lands on the main branch, GitHub Actions prepares a server, installs the project and runs the Jest tests with no human intervention. The repository history reflects the real process: the first attempts failed, I identified the cause, fixed it, and since then every change is validated automatically. Developed within the Computer Programmer program at Lambton College in Ontario, Canada, following professional standards for development, documentation and version control.
// WHAT WAS BUILT
Documentation
- A step-by-step README to replicate the setup
- Screenshots of the workflow and the console
- Improvement proposals: more tests and notifications
// CHALLENGES AND SOLUTIONS
Tests failed on GitHub but not locally
Jest's executable had no execute permission on the GitHub Actions server. I added a step that grants it (chmod +x) before running the tests, and the workflow turned green.
// TESTS
The same tests, locally and in the cloud
$ npm test > [email protected] test > jest PASS __tests__/example.test.js ✓ adds 1 + 2 to equal 3 (4 ms) ✓ subtracts 5 - 2 to equal 3 (1 ms) Test Suites: 1 passed, 1 total Tests: 2 passed, 2 total
// GALLERY
The project in pictures
01 / 02
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MISSION ACCOMPLISHED
Results and impact
- Seven workflow runs; since the fix, all successful
- Every change is validated automatically, with no manual steps
- A base ready for more tests and alerts
Is your team still testing every change by hand?
I automate tests and deployments so your team saves time and ships with more confidence.