io.write('\ntest_up_arrow_scrolls_up_from_empty_line')

  io.write('\ntest_up_arrow_scrolls_up_to_empty_line')

  App.screen.check(y, 'abc', 'F - test_up_arrow_scrolls_up_from_empty_line/baseline/screen:1')

  App.screen.check(y, 'abc', 'F - test_up_arrow_scrolls_up_to_empty_line/baseline/screen:1')

  App.screen.check(y, 'def', 'F - test_up_arrow_scrolls_up_from_empty_line/baseline/screen:2')

  App.screen.check(y, 'def', 'F - test_up_arrow_scrolls_up_to_empty_line/baseline/screen:2')

  App.screen.check(y, 'ghi', 'F - test_up_arrow_scrolls_up_from_empty_line/baseline/screen:3')

  App.screen.check(y, 'ghi', 'F - test_up_arrow_scrolls_up_to_empty_line/baseline/screen:3')

  check_eq(Screen_top1.line, 1, 'F - test_up_arrow_scrolls_up_from_empty_line/screen_top')
  check_eq(Cursor1.line, 1, 'F - test_up_arrow_scrolls_up_from_empty_line/cursor')

  check_eq(Screen_top1.line, 1, 'F - test_up_arrow_scrolls_up_to_empty_line/screen_top')
  check_eq(Cursor1.line, 1, 'F - test_up_arrow_scrolls_up_to_empty_line/cursor')

  App.screen.check(y, 'abc', 'F - test_up_arrow_scrolls_up_from_empty_line/screen:2')

  App.screen.check(y, 'abc', 'F - test_up_arrow_scrolls_up_to_empty_line/screen:2')

  App.screen.check(y, 'def', 'F - test_up_arrow_scrolls_up_from_empty_line/screen:3')

  App.screen.check(y, 'def', 'F - test_up_arrow_scrolls_up_to_empty_line/screen:3')