test function completion will suggest defprotocol with protocol_name snippet when file path matches **/lib/**/*.ex (ElixirLS.LanguageServer.Providers.CompletionTest)

Process completed with exit code 1.

Mix.ensure_application!/1 is undefined or private

Macro.to_string/2 is deprecated. Use Macro.to_string/1 instead

the result of the expression is ignored (suppress the warning by assigning the expression to the _ variable)