Fix order:comm and comment deletion for unbumped comments

fixes #1351, fixes #1352

test/unit/comment_test.rb

@@ -54,16 +54,16 @@ class CommentTest < ActiveSupport::TestCase
 
       should "not bump the parent post" do
         post = FactoryGirl.create(:post)
-        comment = FactoryGirl.create(:comment, :do_not_bump_post => "1", :post => post)
+        comment = FactoryGirl.create(:comment, :do_not_bump_post => true, :post => post)
         post.reload
-        assert_nil(post.last_commented_at)
+        assert_nil(post.last_comment_bumped_at)
 
         comment = FactoryGirl.create(:comment, :post => post)
         post.reload
-        assert_not_nil(post.last_commented_at)
+        assert_not_nil(post.last_comment_bumped_at)
       end
 
-      should "not update the post after exceeding the threshold" do
+      should "not bump the post after exceeding the threshold" do
         Danbooru.config.stubs(:comment_threshold).returns(1)
         p = FactoryGirl.create(:post)
         c1 = FactoryGirl.create(:comment, :post => p)
@@ -71,7 +71,22 @@ class CommentTest < ActiveSupport::TestCase
           c2 = FactoryGirl.create(:comment, :post => p)
         end
         p.reload
-        assert_equal(c1.created_at.to_s, p.last_commented_at.to_s)
+        assert_equal(c1.created_at.to_s, p.last_comment_bumped_at.to_s)
+      end
+
+      should "always record the last_commented_at properly" do
+        post = FactoryGirl.create(:post)
+        Danbooru.config.stubs(:comment_threshold).returns(1)
+
+        c1 = FactoryGirl.create(:comment, :do_not_bump_post => true, :post => post)
+        post.reload
+        assert_equal(c1.created_at.to_s, post.last_commented_at.to_s)
+
+        Timecop.travel(2.seconds.from_now) do
+          c2 = FactoryGirl.create(:comment, :post => post)
+          post.reload
+          assert_equal(c2.created_at.to_s, post.last_commented_at.to_s)
+        end
       end
 
       should "not record the user id of the voter" do