Runing Tests in Docker Container | Bondar Academy

Lesson Summary

In this lesson, we learn how to run tests within a Docker container . Docker provides an isolated virtual environment that allows you to package your application along with its dependencies, ensuring consistent execution across different machines. Why Use Docker? Isolation: Docker containers encapsulate your application and its environment. Portability: Tests can be run on any machine that supports Docker. Dependency Management: Docker handles all operating system dependencies and packages. Setting Up Docker To get started, you need to install Docker Desktop from docker.com . After installation, you can manage your containers and images through its UI. Creating Docker Images and Containers We will use pre-built Cypress Docker images available on Docker Hub. The steps include: Create a file named Dockerfile . Specify the base image using FROM cypress/included:latest . Create a working directory inside the container. Copy your project files, excluding node_modules , using a .dockerignore file. Install dependencies with npm install . Set the entry point and command to run the tests. Building and Running the Container Build the Docker image using: docker build -t cypress-tests . Run the tests with: docker run cypress-tests Using Docker Compose To manage containers and extract reports, create a docker-compose.yaml file. This allows you to map volumes from the container to your host machine: volumes: - .cypress-reports:/tests/cypress-reports Run the compose file with: docker-compose up Finally, stop the service with: docker-compose down By following these steps, you can effectively configure Docker and Docker Compose for your testing environment.