Interactive Testing with mix test.interactive in Elixir

The article discusses mix test.interactive, a tool designed to improve test-driven development in Elixir. It allows users to run tests automatically whenever code is saved, while also enabling interactive modifications to test arguments. The author describes his motivation for creating this tool, comparing it to features from Jest, a JavaScript testing framework, and outlines its advantages over existing tools like mix test.watch. He explains the functionality of mix test.interactive, including various commands that help in running tests selectively, managing test options, and adapting the testing workflow to the user's needs. The author also addresses some limitations and wishes for future enhancements, such as immediate response for commands and tab-completion features. He encourages users to try out mix test.interactive and provides links for further information.