def _test_minimum_select_one_character_by_selection(self, el, assertFunc):
sel = SelectionManager(el)
el.tap()
sel.select_all()
# Move the right caret to the position of the left caret. Since the
# minimum selection range by selection carets is one character, the
# first character should be selected.
(caret1_x, caret1_y), (caret2_x, caret2_y) = sel.selection_carets_location()
self.actions.flick(el, caret2_x, caret2_y, caret1_x, caret1_y).perform()
cmd = sel.js_selection_cmd() +\
'''return (sel.anchorNode == sel.focusNode) &&
(sel.focusOffset - sel.anchorOffset == 1);'''
result = self.marionette.execute_script(cmd, script_args=[el])
assertFunc(result)
