mirror of
https://github.com/zhigang1992/react-native.git
synced 2026-05-22 03:27:35 +08:00
47e061549f
Summary: I was looking at the coverage report of the JavaScript code in the `Libraries` folder, and found some of the modules and functions to be (partially) untested. I believe that adding tests to them would formally capture their behaviour and avoid future regressions. In this PR, I've added some unit tests for 3 utility components. Perhaps a more general question: Are these kinds of PRs appreciated? I'd be interested in submitting more of them in the future. Not applicable, since it only adds tests. Pull Request resolved: https://github.com/facebook/react-native/pull/23903 Differential Revision: D14477601 Pulled By: cpojer fbshipit-source-id: c0700c5b514cd0df983fecfd91c93fc2bd049f5d
67 lines
1.6 KiB
JavaScript
67 lines
1.6 KiB
JavaScript
/**
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* 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';
|
|
|
|
describe('Dimensions', () => {
|
|
const Dimensions = require('Dimensions');
|
|
const Platform = require('Platform');
|
|
|
|
it('should set window dimensions', () => {
|
|
Dimensions.set({
|
|
windowPhysicalPixels: {
|
|
width: 400,
|
|
height: 800,
|
|
scale: 2,
|
|
fontScale: 3,
|
|
},
|
|
});
|
|
|
|
expect(Dimensions.get('window').width).toEqual(200);
|
|
expect(Dimensions.get('window').height).toEqual(400);
|
|
expect(Dimensions.get('window').scale).toEqual(2);
|
|
expect(Dimensions.get('window').fontScale).toEqual(3);
|
|
});
|
|
|
|
it('should set screen dimensions on Android', () => {
|
|
Platform.OS = 'android';
|
|
const dimensions = {
|
|
width: 400,
|
|
height: 800,
|
|
scale: 2,
|
|
fontScale: 3,
|
|
};
|
|
Dimensions.set({
|
|
windowPhysicalPixels: dimensions,
|
|
screenPhysicalPixels: dimensions,
|
|
});
|
|
|
|
expect(Dimensions.get('screen').width).toEqual(200);
|
|
expect(Dimensions.get('screen').height).toEqual(400);
|
|
expect(Dimensions.get('screen').scale).toEqual(2);
|
|
expect(Dimensions.get('screen').fontScale).toEqual(3);
|
|
});
|
|
|
|
it('should set screen dimensions on iOS', () => {
|
|
Platform.OS = 'ios';
|
|
const dimensions = {
|
|
width: 400,
|
|
height: 800,
|
|
scale: 2,
|
|
fontScale: 3,
|
|
};
|
|
Dimensions.set({
|
|
windowPhysicalPixels: dimensions,
|
|
});
|
|
|
|
expect(Dimensions.get('screen')).toEqual(Dimensions.get('window'));
|
|
});
|
|
});
|