thread_test.rb

require 'minitest/autorun'

class TC_Thread_HasKey_InstanceMethod < MiniTest::Test
  def setup
    @thread = Thread.new{ Thread.current[:foo] = 'test' }
  end

  # Why does this fail?
  def test_has_key
    assert(@thread.key?(:foo))
  end

  def teardown
    @thread.exit
    @thread = nil
  end
end