Fixed: repository: mercurial: sort changesets by revision (#3449, #3567).

In DVCS, changesets are not in date order.
Because Mercurial backend inserts changesets from eariest, 'ORDER BY id'
means 'order by revision number'.

Contributed by Yuya Nishihara.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4611 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/repository_mercurial_test.rb

@@ -76,6 +76,17 @@ class RepositoryMercurialTest < ActiveSupport::TestCase
         assert_equal @repository.changesets.find_by_revision('0').committed_on, rev0_committed_on
       end
     end
+
+    def test_changeset_order_by_revision
+      @repository.fetch_changesets
+      @repository.reload
+
+      c0 = @repository.latest_changeset
+      c1 = @repository.changesets.find_by_revision('0')
+      # sorted by revision (id), not by date
+      assert c0.revision.to_i > c1.revision.to_i
+      assert c0.committed_on  < c1.committed_on
+    end
   else
     puts "Mercurial test repository NOT FOUND. Skipping unit tests !!!"
     def test_fake; assert true end