test_win32ole_event.rb: retry #test_s_new_loop with sleep

It seems to fail randomly:
https://ci.appveyor.com/project/ruby/ruby/builds/19963142/job/8gaxepksa0i3b998

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65480 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 17 insertions, 1 deletions

diff --git a/test/win32ole/test_win32ole_event.rb b/test/win32ole/test_win32ole_event.rb
index e23097e2e1..a1546da4a2 100644
--- a/test/win32ole/test_win32ole_event.rb
+++ b/test/win32ole/test_win32ole_event.rb
@@ -117,7 +117,10 @@ if defined?(WIN32OLE_EVENT)
           message_loop
           GC.start
         end
-        assert_match(/OnObjectReady/, @event)
+
+        # @event randomly becomes "OnCompleted" here. Try to wait until it matches.
+        # https://ci.appveyor.com/project/ruby/ruby/builds/19963142/job/8gaxepksa0i3b998
+        assert_match_with_retries(/OnObjectReady/, :@event)
       end
 
       def test_on_event
@@ -147,6 +150,19 @@ if defined?(WIN32OLE_EVENT)
         end
         raise
       end
+
+      def assert_match_with_retries(regexp, ivarname)
+        ivar = instance_variable_get(ivarname)
+
+        tries = 0
+        while tries < 5 && !ivar.match(regexp)
+          $stderr.puts "test_win32ole_event.rb: retrying until #{ivarname} matches #{regexp} (tries: #{tries})..."
+          sleep(2 ** tries) # sleep at most 31s in total
+          ivar = instance_variable_get(ivarname)
+        end
+
+        assert_match(regexp, ivar)
+      end
     end
   end