may fix #119, file paths on windows

lib/jasmine/headless/cacheable_action.rb

@@ -54,7 +54,11 @@ module Jasmine::Headless
     end
 
     def cache_file
-      @cache_file ||= File.expand_path(File.join(self.class.cache_dir, self.class.cache_type, file)) + '.js'
+      @cache_file ||= File.expand_path(relative_cache_file) + '.js'
+    end
+
+    def relative_cache_file
+      File.join(self.class.cache_dir, self.class.cache_type, file.gsub(Dir.pwd + '/', ''))
     end
 
     def fresh?

spec/lib/jasmine/headless/cacheable_action_spec.rb

@@ -95,5 +95,28 @@ describe Jasmine::Headless::CacheableAction do
       end
     end
   end
+
+  describe '#relative_cache_file' do
+    context 'file is an absolute windows file' do
+      let(:current_path) { 'C:/path' }
+      let(:filename) { "file.coffee" }
+      let(:windows_path) { File.join(current_path, filename) }
+      let(:cache_dir) { 'cache dir' }
+      let(:cache_type) { 'cache type' }
+
+      before do
+        cache_object.stubs(:file).returns(windows_path)
+
+        described_class.stubs(:cache_dir).returns(cache_dir)
+        described_class.stubs(:cache_type).returns(cache_type)
+
+        Dir.stubs(:pwd).returns(current_path)
+      end
+
+      subject { cache_object.relative_cache_file }
+
+      it { should == File.join(cache_dir, cache_type, filename) }
+    end
+  end
 end