Add a Rakefile for running tests

Gemfile.lock

@@ -13,6 +13,7 @@ GEM
     mocha (0.11.3)
       metaclass (~> 0.0.1)
     multi_json (1.3.4)
+    rake (0.9.2.2)
     rest-client (1.6.7)
       mime-types (>= 1.16)
     shoulda (3.0.1)
@@ -27,6 +28,7 @@ PLATFORMS
 
 DEPENDENCIES
   mocha
+  rake
   shoulda
   stripe!
   test-unit

Rakefile

@@ -0,0 +1,9 @@
+task :default => [:test]
+
+task :test do
+  ret = true
+  Dir["test/**/*.rb"].each do |f|
+    ret = ret && ruby(f, '')
+  end
+  exit(ret)
+end

stripe.gemspec

@@ -19,6 +19,7 @@ spec = Gem::Specification.new do |s|
   s.add_development_dependency('mocha')
   s.add_development_dependency('shoulda')
   s.add_development_dependency('test-unit')
+  s.add_development_dependency('rake')
 
   s.files = %w{
     bin/stripe-console