openssl.rb

require 'openssl'
require 'thread'

puts "rubysl-openssl: #{RubySL::OpenSSL::VERSION}"
puts "rubysl-digest:  #{RubySL::Digest::VERSION}"

Thread.abort_on_exception = true

input  = 'the cake is possibly a lie'
digest = Digest::SHA256.new

digest.update(input)

expected = digest.hexdigest
output   = Queue.new

puts 'Starting threads...'

threads = 10.times.map do
  Thread.new do
    loop do
      digest = Digest::SHA256.new
      digest.update(input)

      got = digest.hexdigest

      output << got unless got == expected
    end
  end
end

got = output.pop

threads.each(&:kill)

raise "Expected digest #{got.inspect} to equal #{expected.inspect}"