Guardfile

guard :rspec, all_on_start: false, failed_mode: :focus, all_after_pass: false, cmd: :rspec do
  watch(%r{^spec/.+_spec\.rb$})
  watch(%r{^lib/(.+)\.rb$})     { |m| "spec/lib/#{m[1]}_spec.rb" }
  watch("spec/spec_helper.rb")  { "spec" }

  # Rails example
  watch(%r{^app/(.+)\.rb$})                           { |m| "spec/#{m[1]}_spec.rb" }
  watch(%r{^app/(.*)(\.erb|\.slim)$})                 { |m| "spec/#{m[1]}#{m[2]}_spec.rb" }
  watch(%r{^app/controllers/(.+)_(controller)\.rb$})  { |m| ["spec/routing/#{m[1]}_routing_spec.rb", "spec/#{m[2]}s/#{m[1]}_#{m[2]}_spec.rb", "spec/acceptance/#{m[1]}_spec.rb"] }
  watch(%r{^spec/support/(.+)\.rb$})                  { "spec" }
  watch("config/routes.rb")                           { "spec/routing" }
  watch("app/controllers/application_controller.rb")  { "spec/controllers" }

  # Capybara feature specs
  watch(%r{^app/views/(.+)/.*\.(erb|slim)$})          { |m| "spec/features/#{m[1]}_spec.rb" }
end