* lib/test/unit/collector/dir.rb (Test::Unit::Collector::Dir#collect_file):

ignore tests which raised LoadError.

* test/drb/drbtest.rb, test/ruby/test_beginendblock.rb,
  test/ruby/test_system.rb: avoid requiring same file twice.

* test/drb/test_drbssl.rb, test/drb/test_drbunix.rb: should not use
  ARGV unless invoked directly.  do not create test cases unless
  required libraries are available.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4830 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/test/unit/collector/dir.rb

@@ -75,6 +75,7 @@ module Test
             require(name)
           end
           find_test_cases(already_gathered).each{|t| add_suite(suites, t.suite)}
+        rescue LoadError, SystemExit
         ensure
           $:.replace(loadpath)
         end