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