In cases where large refactoring is taking place and there are multiple tests across multiple files failing, there’s an easy shortcut built into Rspec that allows you to re-run your specs but only the ones that failed.

The command ——————— rspec –only-failures

This allows for a tighter feedback loop to get failing tests green.

Setup ———- This functionality doesn’t come for free and some simple, but required, setup is necessary. Details about what’s required can be [found here.] (https://relishapp.com/rspec/rspec-core/docs/command-line/only-failures)

The quick rundown is your Rspec configuration needs some extra flags set:

RSpec.configure do |c|
  c.example_status_persistence_file_path = "failing_specs.txt" 
  c.run_all_when_everything_filtered = true
end

This is required so Rspec will output any failing specs to a file and then read from it when --only-failures is specified.

Permanently using this, it’s also a great idea to add it to your .gitignore file.