Integration of k6 Load Testing with Elixir's LiveView

Sebastian Göttschkes introduces k6, a load testing framework that allows Elixir developers to simulate multiple virtual users and gain insights into their application's performance under various load conditions. While k6 is written in JavaScript, it can be integrated with the Elixir ecosystem through the Elixir k6 library, which provides a wrapper that simplifies the process of setting up and executing load tests. Göttschkes highlights that although the Elixir k6 library provides a good starting point with templates for REST, GraphQL, and LiveView, developers need to implement the specifics of their tests. He discusses the intricacies of testing LiveView applications where one must simulate the events a JavaScript browser client would send, and then handle the resulting payloads, which are designed for rendering HTML and not for API consumption. This can lead to brittle tests that require maintenance when HTML changes. Göttschkes envisions improving the library by adding JavaScript helpers that would make these kinds of tests more robust and maintainable. He encourages community members to contribute to the effort and shares that k6 has been successfully used in a pre-production environment.