end
function test_click_with_mouse_on_empty_line()
  io.write('\ntest_click_with_mouse_on_empty_line')
  -- display two lines with the first one empty
  App.screen.init{width=50, height=80}
  Lines = load_array{'', 'def'}
  Margin_right = 0; Margin_width = Margin_left
  Cursor1 = {line=2, pos=1}
  Screen_top1 = {line=1, pos=1}
  Screen_bottom1 = {}
  -- click on the empty line
  App.draw()
  App.run_after_mouse_click(Margin_left+8,Margin_top+5, 1)
  -- cursor moves
  check_eq(Cursor1.line, 1, 'F - test_click_with_mouse_on_empty_line/cursor')

        line.y = y

        line.starty = y
        line.startpos = 1