Elixir

Using Logger.info and Logger.debug in ExUnit tests

By default in the test env, Phoenix doesn't show Logger.debug/Logger.info outputs in the console.

Table of contents

Logger provides 4 printing levels:

info (allows errors, warns, debugs, infos)
debug (allows errors, warns, debugs)
warn (allows errors, warns)
error (allows errors)

By default the :warn level is turned on. It means that only Logger.warn and Logger.error is printed to the output.

If you'd like to use another two, go to your config/test.exs file and you'll probably see:

# Print only warnings and errors during test
config :logger, level: :warn

Just change the line to the proper level (:debug or :info), and you're ready to go:

# Print all (errors, warnings, debugs and infos) during tests
config :logger, level: :info

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