public void validation_buttons() {
spreadsheet.focus(1, 3);
JQuery buttons = spreadsheet.getMainBlock().getRow(1).jq$n().children(".zsdropdown");
Assert.assertEquals(1, buttons.length());
Assert.assertTrue(buttons.first().isVisible());
spreadsheet.focus(25, 3);
buttons = spreadsheet.getMainBlock().getRow(25).jq$n().children(".zsdropdown");
Assert.assertEquals(1, buttons.length());
Assert.assertTrue(buttons.first().isVisible());