added some execution test

test/unit/test_execution.rb

@@ -0,0 +1,17 @@
+require 'test_helper'
+
+class ExecutionTest < Test::Unit::TestCase
+
+  def test_execution_of_coffeescript
+    `bin/coffee-script test/fixtures/execution/*.cs`
+    sources = Dir['test/fixtures/execution/*.js'].map {|f| File.expand_path(f) }
+    starting_place = File.expand_path(Dir.pwd)
+    Dir.chdir('/Users/jashkenas/Desktop/Beauty/Code/v8')
+    sources.each do |source|
+      assert `./shell #{source}`.chomp.to_sym == :true
+    end
+  ensure
+    Dir.chdir(starting_place)
+  end
+
+end