Rspec: clear terminal before suites in OSX

spec_helper.rb

# omitted...

RSpec.configure do |config|
  # omitted...
  
  config.before(:suite) do
      if RUBY_PLATFORM =~ /darwin/
      # Focus on Terminal
      system %{osascript -e 'tell application "Terminal" to activate'}
      # Send CMD+K to clear
      system %{osascript -e 'if application "Terminal" is frontmost then tell application "System Events" to keystroke "k" using command down'}
      # CMD-TAB to return focus to previous application
      system %{osascript -e 'tell application "System Events" to keystroke tab using command down'}
    end
  end
end