react-native/Libraries/Utilities/__mocks__/PixelRatio.js

26 lines
625 B
JavaScript

/**
* Copyright (c) 2004-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
*/
'use strict';
const PixelRatio = {
get: jest.fn().mockReturnValue(2),
getFontScale: jest.fn(() => PixelRatio.get()),
getPixelSizeForLayoutSize: jest.fn(layoutSize =>
Math.round(layoutSize * PixelRatio.get()),
),
roundToNearestPixel: jest.fn(layoutSize => {
const ratio = PixelRatio.get();
return Math.round(layoutSize * ratio) / ratio;
}),
startDetecting: jest.fn(),
};
module.exports = PixelRatio;