add guard

Guardfile

@@ -0,0 +1,30 @@
+# A sample Guardfile
+# More info at https://github.com/guard/guard#readme
+
+## Uncomment and set this to only include directories you want to watch
+# directories %w(app lib config test spec features)
+
+## Uncomment to clear the screen before every task
+# clearing :on
+
+## Guard internally checks for changes in the Guardfile and exits.
+## If you want Guard to automatically start up again, run guard in a
+## shell loop, e.g.:
+##
+##  $ while bundle exec guard; do echo "Restarting Guard..."; done
+##
+## Note: if you are using the `directories` clause above and you are not
+## watching the project directory ('.'), then you will want to move
+## the Guardfile to a watched dir and symlink it back, e.g.
+#
+#  $ mkdir config
+#  $ mv Guardfile config/
+#  $ ln -s config/Guardfile .
+#
+# and, you'll have to watch "config/Guardfile" instead of "Guardfile"
+
+guard :minitest, :bundler => false do
+  watch(%r{^test/(.*)\/?(.*)_test\.rb$})
+  watch(%r{^lib/(.*/)?([^/]+)\.rb$})     { |m| "test/#{m[1]}test_#{m[2]}.rb" }
+  watch(%r{^test/test_helper\.rb$})      { 'test' }
+end

rvm2-ui.gemspec

@@ -15,7 +15,7 @@ Gem::Specification.new do |s|
   s.test_files = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.required_ruby_version = ">= 2.0.0"
   s.add_dependency('pluginator')
-  %w{rake minitest simplecov coveralls redcarpet}.each do |name|
+  %w{rake minitest simplecov coveralls redcarpet guard guard-minitest}.each do |name|
     s.add_development_dependency(name)
   end
   # s.add_development_dependency("smf-gem")