Method setup

ruby/red-arrow/test/test-file-output-stream.rb:20–24

class TestFileOutputStream < Test::Unit::TestCase
  sub_test_case(".open") do
    def setup
      @file = Tempfile.open("arrow-file-output-stream")
      @file.write("Hello")
      @file.close
    end

    def test_default
      Arrow::FileOutputStream.open(@file.path) do |file|