RSpec: Allow focus filtering

spec/spec_helper.rb

@@ -58,6 +58,9 @@
   # triggering implicit auto-inclusion in groups with matching metadata.
   config.shared_context_metadata_behavior = :apply_to_host_groups
 
+  config.filter_run focus: true
+  config.run_all_when_everything_filtered = true
+
   # The settings below are suggested to provide a good initial experience
   # with RSpec, but feel free to customize to your heart's content.
   #   # This allows you to limit a spec run to individual examples or groups