* lib/test/unit/collector.rb (collect_file): now deletes paths added

to $LOAD_PATH instead of restoring it verbatim.

	* lib/test/unit/autorunner.rb (AutoRunner.run): fixed so that
	  'ruby -rtest/unit -rtest1 -rtest2 -e0' will use the objectspace
	  collector again. Also tried to simplify the calling convention.

	* test/runner.rb: adjusted for new AutoRunner semantics.

	* lib/test/unit.rb: ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7990 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/test/unit/collector/dir.rb

@@ -75,9 +75,8 @@ module Test
         end
 
         def collect_file(name, suites, already_gathered)
-          loadpath = $:.dup
           dir = File.dirname(File.expand_path(name))
-          $:.unshift(dir) unless $:.first == dir
+          $:.unshift(dir)
           if(@req)
             @req.require(name)
           else
@@ -85,7 +84,7 @@ module Test
           end
           find_test_cases(already_gathered).each{|t| add_suite(suites, t.suite)}
         ensure
-          $:.replace(loadpath)
+          $:.delete_at($:.rindex(dir)) if(dir)
         end
       end
     end