/** * Copyright (c) 2015-present, Facebook, Inc. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. * * @format * @emails oncall+react_native */ 'use strict'; const SceneTracker = require('SceneTracker'); describe('setActiveScene', function() { it('can handle multiple listeners and unsubscribe', function() { const listeners = [jest.fn(), jest.fn(), jest.fn()]; const subscriptions = listeners.map(listener => SceneTracker.addActiveSceneChangedListener(listener), ); subscriptions[1].remove(); const newScene = {name: 'scene1'}; SceneTracker.setActiveScene(newScene); expect(listeners[0]).toBeCalledWith(newScene); expect(listeners[1]).not.toBeCalled(); expect(listeners[2]).toBeCalledWith(newScene); }); });