Fixing Gem.available? warning

Author: jdeff

test/test_helper.rb

@@ -1,4 +1,10 @@
-if defined?(Gem) and Gem.available?('redgreen')
+if begin
+    Gem::Specification::find_by_name 'redgreen'
+  rescue Gem::LoadError
+    false
+  rescue
+    Gem.available? 'redgreen'
+  end
   require 'redgreen' if RUBY_VERSION < "1.9"
 end
 require 'test/unit'