diff --git a/spec/guard/rails-assets_spec.rb b/spec/guard/rails-assets_spec.rb
index b69393f..cd0a843 100644
--- a/spec/guard/rails-assets_spec.rb
+++ b/spec/guard/rails-assets_spec.rb
@@ -10,15 +10,15 @@
   end
 
   describe '#start' do
-    it_behaves_like 'guard command', :command => :start, :run => true
+    it_behaves_like 'guard command', :command => :start,         :run => true
   end
 
   describe '#reload' do
-    it_behaves_like 'guard command', :command => :reload, :run => false
+    it_behaves_like 'guard command', :command => :reload,        :run => false
   end
 
   describe '#run_all' do
-    it_behaves_like 'guard command', :command => :run_all, :run => true
+    it_behaves_like 'guard command', :command => :run_all,       :run => true
   end
 
   describe '#run_on_change' do
@@ -26,8 +26,22 @@
   end
 
 
-  describe 'asset compilation' do
-    it 'should notify on success'
-    it 'should notify on failure'
+  describe 'asset compilation using CLI' do
+    def stub_system_with result
+      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