test_thread.rb: stop at once

* test/ruby/test_thread.rb (test_priority): stop both threads at
  once by a flag.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44627 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 2 deletions

diff --git a/test/ruby/test_thread.rb b/test/ruby/test_thread.rb
index fedab8791e..6622d48654 100644
--- a/test/ruby/test_thread.rb
+++ b/test/ruby/test_thread.rb
@@ -127,17 +127,21 @@ class TestThread < Test::Unit::TestCase
 
   def test_priority
     c1 = c2 = 0
-    t1 = Thread.new { loop { c1 += 1 } }
+    run = true
+    t1 = Thread.new { c1 += 1 while run }
     t1.priority = 3
-    t2 = Thread.new { loop { c2 += 1 } }
+    t2 = Thread.new { c2 += 1 while run }
     t2.priority = -3
     assert_equal(3, t1.priority)
     assert_equal(-3, t2.priority)
     sleep 0.5
     5.times do
+      assert_not_predicate(t1, :stop?)
+      assert_not_predicate(t2, :stop?)
       break if c1 > c2
       sleep 0.1
     end
+    run = false
     t1.kill
     t2.kill
     assert_operator(c1, :>, c2, "[ruby-dev:33124]") # not guaranteed