Module: Tapioca::Helpers::Test::Isolation::Forking

Extended by:
T::Sig
Included in:
Tapioca::Helpers::Test::Isolation
Defined in:
lib/tapioca/helpers/test/isolation.rb

Overview

@requires_ancestor: Kernel

Instance Method Summary collapse

Instance Method Details

#run_in_isolation(&_blk) ⇒ Object

: ?{ (?) -> untyped } -> String



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# File 'lib/tapioca/helpers/test/isolation.rb', line 35

def run_in_isolation(&_blk)
  read, write = IO.pipe
  read.binmode
  write.binmode

  this = T.cast(self, Minitest::Test)
  pid = fork do
    read.close
    yield
    begin
      if this.error?
        this.failures.map! do |e|
          Marshal.dump(e)
          e
        rescue TypeError
          ex = Exception.new(e.message)
          ex.set_backtrace(e.backtrace)
          Minitest::UnexpectedError.new(ex)
        end
      end
      test_result = defined?(Minitest::Result) ? Minitest::Result.from(self) : this.dup
      result = Marshal.dump(test_result)
    end

    write.puts [result].pack("m")
    write.close
    exit!(false)
  end

  write.close
  result = read.read
  read.close

  Process.wait2(pid)
  result.unpack1("m")
end