tests for tagging, eliminate dupes, script to unify tags

tests/tag_tests.rb

@@ -9,5 +9,24 @@ describe Tag do
       Tag.create_unless_exists tag_name.upcase
       Tag.filter(name: tag_name).count.must_equal 1
     end
+
+    it 'prohibits junk tags' do
+      Tag.where(name: '').delete
+      tag = Tag.create_unless_exists ''
+      Tag.where(name: '').count.must_equal 0
+    end
+
+    it 'strips tags' do
+      name = SecureRandom.hex(4)+'  '
+      Tag.create_unless_exists name
+
+      Tag[name: name.strip].wont_be_nil
+    end
+
+    it 'does not duplicate' do
+      name = SecureRandom.hex(4).upcase
+      2.times { Tag.create_unless_exists name }
+      Tag.where(name: name.downcase).count.must_equal 1
+    end
   end
 end