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module RSpec
module Support
module InSubProcess
if Process.respond_to?(:fork) && !(Ruby.jruby? && RUBY_VERSION == '1.8.7')
# Useful as a way to isolate a global change to a subprocess.
# rubocop:disable MethodLength
def in_sub_process(prevent_warnings=true)
readme, writeme = IO.pipe
pid = Process.fork do
exception = nil
warning_preventer = $stderr = RSpec::Support::StdErrSplitter.new($stderr)
begin
yield
warning_preventer.verify_no_warnings! if prevent_warnings
rescue Support::AllExceptionsExceptOnesWeMustNotRescue => e
exception = e
end
writeme.write Marshal.dump(exception)
readme.close
writeme.close
exit! # prevent at_exit hooks from running (e.g. minitest)
end
writeme.close
Process.waitpid(pid)
exception = Marshal.load(readme.read)
readme.close
raise exception if exception
end
# rubocop:enable MethodLength
alias :in_sub_process_if_possible :in_sub_process
else
def in_sub_process(*)
skip "This spec requires forking to work properly, " \
"and your platform does not support forking"
end
def in_sub_process_if_possible(*)
yield
end
end
end
end
end
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