function test_move_cursor_using_mouse()
  io.write('\ntest_move_cursor_using_mouse')
  App.screen.init{width=50, height=60}
  Lines = load_array{'abc', 'def', 'xyz'}
  Line_width = App.screen.width
  Cursor1 = {line=1, pos=1}
  Screen_top1 = {line=1, pos=1}
  Screen_bottom1 = {}
  Zoom = 1
  App.draw()  -- populate line.y for each line in Lines
  local screen_top_margin = 15  -- pixels
  local screen_left_margin = 25  -- pixels
  App.run_after_mousepress(screen_left_margin+8,screen_top_margin+5, '1')
  check_eq(Cursor1.line, 1, 'F - test_move_cursor_using_mouse/cursor:line')
  check_eq(Cursor1.pos, 2, 'F - test_move_cursor_using_mouse/cursor:pos')
end

  if x < 16 then return false end

  if x < 25 then return false end

  App.screen.contents = {}
  App.draw()
end
function App.run_after_mousepress(x,y, button)
  App.mousepressed(x,y, button)