spec/ruby/library/monitor/synchronize_spec.rb


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require_relative '../../spec_helper'
require 'monitor'

describe "Monitor#synchronize" do
  it "unlocks after return, even if it was interrupted by Thread#raise" do
    exc_class = Class.new(RuntimeError)

    monitor = Monitor.new
    10.times do
      locked = false

      thread = Thread.new do
        begin
          monitor.synchronize do
            locked = true
            # Do not wait here, we are trying to interrupt the ensure part of #synchronize
          end
          sleep # wait for exception if it did not happen yet
        rescue exc_class
          monitor.should_not.mon_locked?
          :ok
        end
      end

      Thread.pass until locked
      thread.raise exc_class, "interrupt"
      thread.value.should == :ok
    end
  end
end