# File lib/minitest/unit.rb, line 495 def capture_subprocess_io require 'tempfile' captured_stdout, captured_stderr = Tempfile.new("out"), Tempfile.new("err") synchronize do orig_stdout, orig_stderr = $stdout.dup, $stderr.dup $stdout.reopen captured_stdout $stderr.reopen captured_stderr begin yield $stdout.rewind $stderr.rewind [captured_stdout.read, captured_stderr.read] ensure captured_stdout.unlink captured_stderr.unlink $stdout.reopen orig_stdout $stderr.reopen orig_stderr end end end