added notify specs

spec/guard/rails-assets_spec.rb

@@ -26,8 +26,22 @@ describe Guard::RailsAssets do
   end
 
 
-  describe 'asset compilation' do
+  describe 'asset compilation using CLI' do
-    it 'should notify on success'
+    def stub_system_with result
-    it 'should notify on failure'
+      Kernel.stub(:system).with("rm -rf public/assets && bundle exec rake assets:precompile").and_return result
+    end
+
+    it 'should notify on success' do
+      stub_system_with true
+      Kernel.should_receive(:~).with('tree public/assets').and_return "a\nb\n1 directory, 2 files"
+      Guard::Notifier.should_receive(:notify).with('1 directory, 2 files', :title => 'Assets compiled')
+      subject.compile_assets
+    end
+    it 'should notify on failure' do
+      stub_system_with false
+      Kernel.should_not_receive(:~)
+      Guard::Notifier.should_receive(:notify).with('see the details in the terminal', :title => "Can't compile assets", :image => :failed)
+      subject.compile_assets
+    end
   end
 end