How to create unit tests for Docker images (specifically for Dockerfile files)?

In the article 'Docker Unit Test: How to Test a Dockerfile Guide,' author Gasparev explores how to effectively conduct tests on Dockerfiles. Testing Dockerfiles is essential to ensure containers are properly configured and operate as intended. When working with containers, we often encounter various reliable and unstable conditions, making testing a crucial step in the software development process. Gasparev discusses several strategies, including unit testing, which allows for quick identification of problems. The article emphasizes the importance of automating tests, which translates to higher quality in the final product. Ultimately, the author provides practical tips on tools and techniques that simplify Dockerfile testing in daily programming tasks.