gistfile1.txt

RSpec.describe V8Eval, '#multithreading' do
  context 'with multithread execution' do
    it 'should execute concurrently' do
      # V8Thread is a thread which runs a V8 instance.
      class V8Thread
        def initialize(num)
          @num_repeat = num
          @v8 = V8Eval::V8.new
          @counter = 0
        end

        def eval_v8
          thread = Thread.new do
            @v8.eval('function inc(x) { return x + 1; }')
            @num_repeat.times do
              @counter = @v8.call('inc', [@counter])
              puts @counter
            end
            expect(@counter).to eq(@num_repeat)
          end
          return thread
        end
      end



      num_repeat = 10000

      thread1 = V8Thread.new(num_repeat).eval_v8
      thread2 = V8Thread.new(num_repeat).eval_v8

      thread1.join
      thread2.join

    end
  end
end