react-native-toggle-calendar/src/testIDs.js

Horizontal as well as Grid calendar built on top of react-native-calendars

const PREFIX = 'native.calendar';

module.exports = {
  CHANGE_MONTH_LEFT_ARROW: `${PREFIX}.CHANGE_MONTH_LEFT_ARROW`,
  CHANGE_MONTH_RIGHT_ARROW: `${PREFIX}.CHANGE_MONTH_RIGHT_ARROW`
};