implement checking for uncompressed support and version checking, sta…

…rting constructing url w/ option overrides

lib/query.rb

@@ -34,12 +34,41 @@ def download(opts={})
 
        # TODO
        def url(opts={})
-         path 
+         opts.empty?? path :  construct_url(opts)
        end
 
-       def latest_version
+       def has_uncompressed?
+         !! respond_to?("path(u)")
+       end
+
+       def latest
          versions.first
        end
+
+       private
+       def construct_url(opts)
+         defaults = { :version => latest, :uncompressed => false}
+         defaults.merge!(opts)
+         check_version_available(opts[:version])
+         check_uncompressed_available if opts[:uncompressed]
+
+       end 
+
+       def check_version_available(version)
+         if not versions.include? version
+           raise "#{name} doesn't have version: #{version}.  available versions: #{versions}"                             
+         end
+         true
+       end
+
+       def check_uncompressed_available
+         if not uncompressed?
+           raise "#{name} doesn't support uncompressed"                             
+         end
+         true
+       end
+
+
      end
 
     # Query Google about the libraries it provides w/ this class

spec/query_spec.rb

@@ -40,14 +40,26 @@ module JsJuice
       @jquery = @google['jquery']
     end                          
 
+    it "tells if a library offers an uncompressed version" do
+      @google['jquery'].should have_uncompressed
+      @google['prototype'].should_not have_uncompressed
+
+
+    end
     describe "url" do
       it "is by default the latest compressed library version" do
         # given
-        version = @jquery.latest_version
+        version = @jquery.latest
         expected_url = "http://ajax.googleapis.com/ajax/libs/jquery/#{version}/jquery.min.js"
         # then
         @jquery.url.should == expected_url
-
+      end                                 
+
+      it "can be overriden what version to use" do
+        # given
+        expected_url = "http://ajax.googleapis.com/ajax/libs/jquery/1.3.0/jquery.min.js"
+        # then
+        @jquery.url(:version => '1.3.0').should == expected_url
       end
     end
   end