[SPEC] Profile slowest cucumber features

[sfgeorge]

Fork-lifted a technique from https://itshouldbeuseful.wordpress.com/2010/11/10/find-your-slowest-running-cucumber-features/ for profiling slow cucumber tests. Particularly helpful with how slow some of the cucumber tests are running/timing-out on some JRuby builds currently.

Here's an example of the output:

------------- Top 22 slowest scenarios -------------
86.15  features/cli_start.feature::Command start with only path works properly
82.52  features/cli_start.feature::Command start with no path inside of the app directory
22.84  features/cli_start.feature::Starting without the console
21.46  features/controller_generator.feature::Generate a controller with lower-case name
21.23  features/controller_generator.feature::Generate a controller and a test file
12.18  features/cli_plugin.feature::Command create_rubygem_hook
10.89  features/cli_plugin.feature::Command create_github_hook
9.9  features/plugin_generator.feature::Generate the basic structure for a plugin with a constant name
8.97  features/cli_create.feature::Generate application with valid layout
8.59  features/cli_create.feature::Generate application --empty
8.58  features/cli_basic.feature::No arguments given
8.53  features/cli_create.feature::Running create with no arguments
8.43  features/plugin_generator.feature::Generate the basic structure for a plugin with an underscored name
8.42  features/cli_generate.feature::Generator help
8.38  features/cli_plugin.feature::No arguments given
8.29  features/cli_basic.feature::Command help
8.28  features/cli_plugin.feature::Command help
8.26  features/cli_generate.feature::Listing generators
8.24  features/cli_basic.feature::Command version should print the version
8.18  features/cli_start.feature::Command start with no path outside of the app directory
8.12  features/cli_plugin.feature::Unrecognized commands
8.08  features/cli_basic.feature::Unrecognized commands

[coveralls]

Coverage remained the same at 98.232% when pulling 162fa7c on sfgeorge:profile-slow-cucumber-features into a90115a on adhearsion:develop.

[bklang]

@sfgeorge Was this an investigational PR, or did you want to merge it?

[sfgeorge]

@bklang Thanks! I'm thinking this would be good as a constant addition. Ready for review & feedback from you, @lpradovera and anyone else who has input. Danke! 🙇

[sfgeorge]

woo-woo! 🚀