Add tests for slug regeneration in non scoped record

test/slugged_test.rb

@@ -141,6 +141,35 @@ def model_class
     end
   end
 
+  test "should not allow duplicate slugs after regeneration for persisted record" do
+    transaction do
+      model1 = model_class.create! :name => "a"
+      model2 = model_class.new :name => "a"
+      model2.save!
+
+      model2.send(:set_slug)
+      first_generated_friendly_id = model2.friendly_id
+      model2.send(:set_slug)
+      second_generated_friendly_id = model2.friendly_id
+
+      assert model1.friendly_id != model2.friendly_id
+    end
+  end
+
+  test "should not allow duplicate slugs after regeneration for new record" do
+    transaction do
+      model1 = model_class.create! :name => "a"
+      model2 = model_class.new :name => "a"
+
+      model2.send(:set_slug)
+      first_generated_friendly_id = model2.friendly_id
+      model2.send(:set_slug)
+      second_generated_friendly_id = model2.friendly_id
+
+      assert model1.friendly_id != model2.friendly_id
+    end
+  end
+
 end
 
 class SlugSeparatorTest < MiniTest::Unit::TestCase
@@ -220,7 +249,7 @@ class MenuItem < ActiveRecord::Base
     friendly_id :name, :use => :slugged
     before_create :init_primary_key
 
-    def self.primary_key 
+    def self.primary_key
       "string_key"
     end