[Misc] Added test for update_attributes, Closes mbleigh#547

lib/acts-as-taggable-on.rb

@@ -3,7 +3,7 @@
 require 'active_support/core_ext/module'
 require 'action_view'
 
-require_relative 'acts_as_taggable_on/engine'
+require_relative 'acts_as_taggable_on/engine'  if defined?(Rails)
 
 require 'digest/sha1'
 

spec/acts_as_taggable_on/taggable_spec.rb

@@ -506,6 +506,13 @@
     expect(options).to eq({:exclude => true})
   end
 
+  it 'should not delete tags if not updated' do
+    model = TaggableModel.create(name: 'foo', tag_list: 'ruby, rails, programming')
+    model.update_attributes(name: 'bar')
+    model.reload
+    expect(model.tag_list.sort).to eq(%w(ruby rails programming).sort)
+  end
+
   context 'Duplicates' do
     context 'should not create duplicate taggings' do
       let(:bob) { TaggableModel.create(name: 'Bob') }