test-with watches your current directory and runs the command you specify every time something is changed. I find it valuable because...

test-with truffle test will run the test suite of your Ethereum app and update the results after every file change

test-with rails test will run the test suite of your Rails app and update the results after every file change

test-with rails test test/controllers/charges_controller.rb will run the specified Rails test and update the results after every file change

test-with ruby letter_test.rb will run the specified Ruby file and update the results after every file change

test-with git status will show you list of changes in the directory, updated in real time

Installation

Run in your terminal

gem install test_with

Usage

See above, the very top.

License

The gem is available as open source under the terms of the MIT License.