Module: Minitest::ForkExecutor::ClassMethods

Defined in:
lib/minitest/fork_executor.rb

Instance Method Summary collapse

Instance Method Details

#run_one_method(klass, method_name) ⇒ Object

The updated version of Minitest.run_one_method that forks before actually running a test case, makes the child run it and send the result to the parent process.



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# File 'lib/minitest/fork_executor.rb', line 20

def run_one_method klass, method_name
  read_io, write_io = IO.pipe
  read_io.binmode
  write_io.binmode

  if fork
    # Parent: load the result sent from the child

    write_io.close
    result = Marshal.load(read_io)
    read_io.close

    Process.wait
  else
    # Child: just run normally, dump the result, and exit the process to
    # avoid double-reporting.
    result = super

    read_io.close
    Marshal.dump(result, write_io)
    write_io.close
    exit
  end

  result
end