[Cache] Start specs

lib/cocoapods/downloader/cache.rb

@@ -17,7 +17,7 @@ module Pod
       #
       def initialize(root)
         @root = Pathname(root)
-        root.mkpath unless root.exist?
+        @root.mkpath unless @root.exist?
       end
 
       # Downloads the Pod from the given `request`

spec/unit/downloader/cache_spec.rb

+require File.expand_path('../../../spec_helper', __FILE__)
+
+module Pod
+  describe Downloader::Cache do
+    before do
+      @cache = Downloader::Cache.new(Dir.mktmpdir)
+      @spec = fixture_spec('banana-lib/BananaLib.podspec')
+      @spec.source = { :git => SpecHelper.fixture('banana-lib') }
+      @request = Downloader::Request.new(:spec => @spec, :released => true)
+    end
+
+    it 'returns the root' do
+      @cache.root.should.be.directory?
+    end
+
+    describe 'when the download is not cached' do
+      it 'downloads the source' do
+        Downloader::Git.any_instance.expects(:download)
+        Downloader::Git.any_instance.expects(:checkout_options).returns(@spec.source)
+        @cache.download_pod(@request)
+      end
+    end
+
+    after do
+      @cache.root.rmtree
+    end
+  end
+end