Automated Builds, Testing Pipelines, and Deployment Workflows - Textnotes

Automated Builds, Testing Pipelines, and Deployment Workflows

Learn how to implement continuous integration (CI) and continuous deployment (CD) for TypeScript applications. This module explains automated builds, testing pipelines, and deployment workflows to ensure reliable and scalable delivery

1. Automated Builds

CI systems automatically build your application when code changes are pushed.

Popular CI Tools

  1. GitHub Actions
  2. GitLab CI/CD
  3. Jenkins
  4. CircleCI

Example GitHub Actions Workflow (.github/workflows/ci.yml)


name: CI

on:
push:
branches: [main]
pull_request:
branches: [main]

jobs:
build:
runs-on: ubuntu-latest

steps:
- uses: actions/checkout@v3
- name: Setup Node.js
uses: actions/setup-node@v3
with:
node-version: 20
- run: npm install
- run: npm run build

Automated builds ensure that every change is validated before merging, reducing errors in production.

2. Testing Pipelines

CI pipelines should include automated testing to verify application correctness.

Example: Add Testing to Workflow


- run: npm run test

Best Practices

  1. Run unit tests on every push
  2. Include integration tests for API and database
  3. Generate coverage reports
  4. Fail builds automatically if tests fail

Testing pipelines catch bugs early and maintain high code quality.

3. Deployment Workflows

CD pipelines deploy the application automatically after successful builds and tests.

Example Deployment Steps

  1. Build Docker image and push to registry

- run: docker build -t my-ts-app .
- run: docker tag my-ts-app registry.example.com/my-ts-app:latest
- run: docker push registry.example.com/my-ts-app:latest
  1. Deploy to staging or production environments using tools like:
  2. Kubernetes
  3. AWS ECS/Fargate
  4. Azure App Service
  5. Heroku
  6. Use environment variables and secrets for secure configuration

Best Practices

  1. Deploy automatically only on main branch merges
  2. Keep staging environment for testing before production
  3. Rollback strategy in case of failures

Conclusion

Continuous integration and deployment (CI/CD) automates builds, testing, and deployment for TypeScript applications. Implementing CI/CD ensures reliable, repeatable, and fast delivery, reduces human errors, and enhances development productivity.