Run Selenium UI tests in Docker containers

Along with Unit and Integration Tests, UI tests are very important in the software development lifecycle. They can detect bugs and anomalies before going to Production. But, UI tests could be so expensive to setup: we need a full VM with all the dependencies. And sometimes we need more than one VM if we want to scale out to run tests in less time.

What would be a light and easy solution to run UI tests ?

Instead of relying on VMs, we can launch UI Tests in Docker containers !

Let’s see how that works through a demo.

We will take a sample .NET Core UI tests written using Selenium. Then, we will setup and deploy the Selenium containers to run the tests.

The principles still apply to other programming languages and frameworks.

When we deploy an app, we want to test it manually. A tester will open the browser, paste the URL, type his login and password, click login button and check if the home page shows up correctly. Selenium comes with the promise to automate this process. A robot will do that instead of a human ! The following video explains it in details.

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