Skip flaky tests on truffleruby

Author: eregon

spec/concurrent/channel/buffer/unbuffered_spec.rb

@@ -232,6 +232,8 @@ module Concurrent::Channel::Buffer
       end
 
       it 'returns Concurrent::NULL, false when closed and no items remain' do
+        skip('flaky on truffleruby') if Concurrent.on_truffleruby?
+
         t = in_thread do
           subject.put(:foo)
         end

spec/concurrent/dataflow_spec.rb

@@ -18,6 +18,8 @@ module Concurrent
     end
 
     specify '#dataflow_with uses the given executor' do
+      skip('flaky on truffleruby') if Concurrent.on_truffleruby?
+
       input = Future.execute{0}
       result = Future.new{0}
 

spec/concurrent/edge/erlang_actor_spec.rb

@@ -917,6 +917,8 @@
           end
 
           specify "timing out" do
+            skip('flaky on truffleruby') if Concurrent.on_truffleruby?
+
             count_down = Concurrent::CountDownLatch.new
             body = { on_thread: -> { m = receive; count_down.wait; reply m },
                      on_pool:   -> { receive { |m| count_down.wait; reply m } } }

spec/concurrent/throttle_spec.rb

@@ -4,6 +4,8 @@
 RSpec.describe 'Concurrent' do
   describe 'Throttle' do
     specify 'acquiring' do
+      skip('flaky on truffleruby') if Concurrent.on_truffleruby?
+
       throttle = Concurrent::Throttle.new 2
       expect(throttle.max_capacity).to eq 2
       expect(throttle.available_capacity).to eq 2