How to apply automated unit testing and continuous integration to a simple JavaScript project?

What is automated testing?

Automated Testing is testing where tests are run without human intervention.

What is Continuous Integration?

Continuous Integration is the practice of integrating of code change into single codebase continuously.

Steps

Let's make pipeline for software development

Concept:

• file changes
• trigger an automated testing
• release to production

These can be done with the help of continuous integration.

Preparation:

Let's get into Github actions as a CI/CD service.

For CI/CD service, there needs to be configured with a YAML file which takes:

• name of the pipeline or workflow
• list of jobs
• list of steps for every job

Github search config file under ./github/workflows so let's create javascript.yaml file under ./github/workflows

name: JavaScript workflow
on: [push]
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v1
    - name: Use Node.js 12.x
      uses: actions/setup-node@v1
      with:
        node-version: "12.x"
    - name: npm install, and test
      run: |
        npm install
        npm test
      env:
        CI: true

Now commit the code and push it to github.

Observation:

You will see the running job on the GitHub Actions Tab. I committed two times, one for the wrong script and another for the correct script.