c_glib/test/test-feather-file-reader.rb

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class TestFeatherFileReader < Test::Unit::TestCase
  include Helper::Buildable

  def setup_file(table)
    tempfile = Tempfile.open("arrow-feather-file-reader")
    output = Arrow::FileOutputStream.new(tempfile.path, false)
    begin
      table.write_as_feather(output)
    ensure
      output.close
    end

    input = Arrow::MemoryMappedInputStream.new(tempfile.path)
    begin
      reader = Arrow::FeatherFileReader.new(input)
      yield(reader)
    ensure
      input.close
    end
  end

  test("#read") do
    table = build_table("message" => build_string_array(["Login"]),
                        "is_critical" => build_boolean_array([true]))
    setup_file(table) do |reader|
      assert do
        reader.version >= 2
      end
      assert_equal(table, reader.read)
    end
  end

  test("#read_indices") do
    table = build_table("message" => build_string_array(["Login"]),
                        "is_critical" => build_boolean_array([true]),
                        "host" => build_string_array(["www"]))
    setup_file(table) do |reader|
      assert_equal(build_table("message" => build_string_array(["Login"]),
                               "host" => build_string_array(["www"])),
                   reader.read_indices([2, 0]))
    end
  end

  test("#read_names") do
    table = build_table("message" => build_string_array(["Login"]),
                        "is_critical" => build_boolean_array([true]),
                        "host" => build_string_array(["www"]))
    setup_file(table) do |reader|
      assert_equal(build_table("message" => build_string_array(["Login"]),
                               "host" => build_string_array(["www"])),
                   reader.read_names(["message", "host"]))
    end
  end
end