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module InSubProcess
if RUBY_PLATFORM == 'java'
def in_sub_process
pending "This spec requires forking to work properly, " +
"and JRuby does not support forking"
end
else
# Useful as a way to isolate a global change to a subprocess.
def in_sub_process
readme, writeme = IO.pipe
pid = Process.fork do
value = nil
begin
yield
rescue => e
value = e
end
writeme.write Marshal.dump(value)
readme.close
writeme.close
exit! # prevent at_exit hooks from running (e.g. minitest)
end
writeme.close
Process.waitpid(pid)
if exception = Marshal.load(readme.read)
raise exception
end
readme.close
end
end
end
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