fix typo in Cask.init :(

💩 this is what i get for doing things outside of test coverage

added a smoke test this time

lib/cask.rb

@@ -32,12 +32,12 @@ class Cask
   end
 
   def self.appdir
-    Pathname.new(File.expand_path("~/Applications"))
+    @appdir ||= Pathname.new(File.expand_path("~/Applications"))
   end
   
   def self.init
-    HOMEBREW_CACHE.mkpath unless HOMEBREW_CACHE.exists?
-    appdir.mkpath unless appdir.exists?
+    HOMEBREW_CACHE.mkpath unless HOMEBREW_CACHE.exist?
+    appdir.mkpath unless appdir.exist?
   end
 
   def self.path(cask_title)

test/cask_test.rb

@@ -37,4 +37,14 @@ describe Cask do
       application.must_be :directory?
     end
   end
+
+  describe "init" do
+    it "sets up dependent directories required for us to properly function" do
+      HOMEBREW_CACHE.stubs(:exist?).returns(false)
+      Cask.appdir.stubs(:exist?).returns(false)
+      HOMEBREW_CACHE.expects :mkpath
+      Cask.appdir.expects :mkpath
+      Cask.init
+    end
+  end
 end