added test

test/unit/tag_test.rb

@@ -74,6 +74,23 @@ class TagTest < ActiveSupport::TestCase
         },
       },
 
+      # test 5
+      {
+        :tag_remove => {
+          :item          => 'tag1',
+          :object        => 'Object1',
+          :o_id          => 123,
+          :created_by_id => 1
+        },
+        :verify => {
+          :object => 'Object1',
+          :items => {
+            'tag1' => false,
+            'tag2' => true,
+          },
+        },
+      },
+
     ]
     tests.each { |test|
       success = Tag.tag_add( test[:tag_add] )