Let’s keep it simple and actually do something.
Launch PowerShell and you’re in the REPL.
In PowerShell, you can debug scripts using the built-in PowerShell Integrated Scripting Environment (ISE) or Visual Studio Code (VS Code) with the PowerShell extension.
PowerShell does not have a built-in testing framework, but Pester, a popular third-party module, is widely used for writing and running tests.