OMG a test suite!

Just getting started of course, but this piggy backs on Homebrew's
testing strategy to give us a platform for a fully featured test suite.
Neato!

And the tests provide value right away, as I added some better error
handling to `Cask.load`.

Big things ahead. Just you wait.

Gemfile

@@ -0,0 +1,5 @@
+source :rubygems
+
+group :test do
+  gem 'purdytest'
+end

Gemfile.lock

@@ -0,0 +1,12 @@
+GEM
+  remote: http://rubygems.org/
+  specs:
+    minitest (2.12.1)
+    purdytest (1.0.0)
+      minitest (~> 2.2)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  purdytest

Rakefile

@@ -0,0 +1,7 @@
+require 'rake/testtask'
+
+Rake::TestTask.new do |t|
+  t.pattern = "spec/*_test.rb"
+end
+
+task :default => :test

lib/cask.rb

@@ -80,7 +80,9 @@ class Cask
   end
 
   def self.load(cask_title)
-    require path cask_title
+    cask_path = path(cask_title)
+    raise CaskUnavailableError, cask_title unless cask_path
+    require cask_path
     const_get(cask_title.split('/').last.split('-').map(&:capitalize).join).new
   end
 

spec/cask_test.rb

@@ -0,0 +1,17 @@
+require_relative 'spec_helper'
+
+describe Cask do
+  describe "load" do
+    it "returns an instance of the cask with the given name" do
+      c = Cask.load("adium")
+      c.must_be_kind_of(Cask)
+      c.must_be_instance_of(Adium)
+    end
+
+    it "raises an error when attempting to load a cask that doesn't exist" do
+      lambda {
+        Cask.load("notacask")
+      }.must_raise(CaskUnavailableError)
+    end
+  end
+end

spec/spec_helper.rb

@@ -0,0 +1,34 @@
+require 'bundler/setup'
+require 'pp'
+
+# add cask lib to load path
+brew_cask_path = Pathname.new(File.expand_path(__FILE__+'/../../'))
+casks_path = brew_cask_path.join('casks')
+lib_path = brew_cask_path.join('lib')
+
+$:.push(lib_path)
+
+# add vendored homebrew to load path
+homebrew_path = brew_cask_path.join('spec', 'support', 'homebrew')
+$:.push(homebrew_path.join('Library', 'Homebrew'))
+
+# require homebrew testing env
+require 'test/testing_env'
+
+# add in HOMEBREW_LIBRARY constant, which is for some reason not set in testing_env
+HOMEBREW_LIBRARY = HOMEBREW_REPOSITORY/"Library"
+
+
+# must be called after testing_env so at_exit hooks are in proper order
+require 'minitest/spec'
+require 'minitest/autorun'
+require 'purdytest'
+
+# our baby
+require 'cask'
+
+# "install" brew-cask into homebrew testing env
+require 'cmd/tap'
+shutup do 
+  Homebrew.install_tap 'phinze', 'cask'
+end

spec/support/homebrew

@@ -0,0 +1 @@
+Subproject commit c40cff570b905b5e4a6b283edc703f7b84bd0001