Make sure that #scm_iconv returns a string with the target encoding (#14534).

filechanges.find_by_revision_and_path fails with SQLite if arguments are not UTF-8 encoded.

git-svn-id: http://svn.redmine.org/redmine/trunk@13902 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/scm/adapters/abstract_adapter.rb

@@ -283,7 +283,7 @@ module Redmine
 
         def scm_iconv(to, from, str)
           return nil if str.nil?
-          return str if to == from
+          return str if to == from && str.encoding.to_s == from
           str.force_encoding(from)
           begin
             str.encode(to)

test/unit/repository_cvs_test.rb

@@ -179,6 +179,7 @@ class RepositoryCvsTest < ActiveSupport::TestCase
       assert_kind_of Redmine::Scm::Adapters::Entries, entries
       assert_equal 3, entries.size
       assert_equal entries[2].name, "README"
+      assert_equal 'UTF-8', entries[2].path.encoding.to_s
       assert_equal entries[2].lastrev.time, Time.gm(2007, 12, 13, 16, 27, 22)
       assert_equal entries[2].lastrev.identifier, '3'
       assert_equal entries[2].lastrev.revision, '3'