From 91a254fd08eb7691387c6c253f85145ea0578163 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 3 Jul 2012 21:19:52 +0000
Subject: bootstraptest: no stderr output

* bootstraptest/runner.rb (assert_check): capture stderr and ensure
  nothing is output.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36293 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 bootstraptest/runner.rb | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

(limited to 'bootstraptest')

diff --git a/bootstraptest/runner.rb b/bootstraptest/runner.rb
index eef8a20d19..c885b7e98c 100755
--- a/bootstraptest/runner.rb
+++ b/bootstraptest/runner.rb
@@ -223,8 +223,9 @@ end
 
 def assert_check(testsrc, message = '', opt = '')
   show_progress(message) {
-    result = get_result_string(testsrc, opt)
+    result, errout = with_stderr {get_result_string(testsrc, opt)}
     check_coredump
+    error "stderr output is not empty\n", adjust_indent(errout) unless errout.empty?
     yield(result)
   }
 end
@@ -396,6 +397,23 @@ def get_result_string(src, opt = '')
   end
 end
 
+def with_stderr
+  out = err = nil
+  IO.pipe do |r, w|
+    stderr = $stderr.dup
+    $stderr.reopen(w)
+    w.close
+    reader = Thread.start {r.read}
+    begin
+      out = yield
+    ensure
+      $stderr.reopen(stderr)
+      err = reader.value
+    end
+  end
+  return out, err
+end
+
 def newtest
   @location = File.basename(caller(2).first)
   @count += 1
-- 
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