mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Rubén Norte
249b8d21c4
Summary: This fixes how ES modules are handled in Jest tests in the react-native codebase. They caused some problems before because `import` statements weren't inlined as `require` calls were, so there were some errors in tests when migrating from CommonJS to ESM. This changes the transform that Jest uses to inline import statements the same way, so we can migrate everything without issues in tests. Changelog: [Internal] Reviewed By: kacieb Differential Revision: D28899692 fbshipit-source-id: 027690f57ca3b5613c261a1089c0635af76662b2
68 lines
2.0 KiB
JavaScript
68 lines
2.0 KiB
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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* @flow-strict
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*/
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'use strict';
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import * as React from 'react';
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import ScrollView from '../ScrollView';
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import * as ReactNativeTestTools from '../../../Utilities/ReactNativeTestTools';
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import ReactTestRenderer from 'react-test-renderer';
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import View from '../../View/View';
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import Text from '../../../Text/Text';
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describe('<ScrollView />', () => {
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it('should render as expected', () => {
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ReactNativeTestTools.expectRendersMatchingSnapshot(
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'ScrollView',
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() => (
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<ScrollView>
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<View>
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<Text>Hello World!</Text>
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</View>
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</ScrollView>
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),
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() => {
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jest.dontMock('../ScrollView');
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},
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);
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});
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it('should mock native methods and instance methods when mocked', () => {
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jest.resetModules();
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jest.mock('../ScrollView');
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const ref = React.createRef();
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ReactTestRenderer.create(<ScrollView ref={ref} />);
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expect(ref.current != null && ref.current.measure).toBeInstanceOf(
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jest.fn().constructor,
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);
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expect(ref.current != null && ref.current.scrollTo).toBeInstanceOf(
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jest.fn().constructor,
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);
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});
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it('getInnerViewRef for case where it returns a native view', () => {
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jest.resetModules();
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jest.unmock('../ScrollView');
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const scrollViewRef = React.createRef(null);
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ReactTestRenderer.create(<ScrollView ref={scrollViewRef} />);
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const innerViewRef = scrollViewRef.current.getInnerViewRef();
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// This is checking if the ref acts like a host component. If we had an
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// `isHostComponent(ref)` method, that would be preferred.
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expect(innerViewRef.measure).toBeInstanceOf(jest.fn().constructor);
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expect(innerViewRef.measureLayout).toBeInstanceOf(jest.fn().constructor);
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expect(innerViewRef.measureInWindow).toBeInstanceOf(jest.fn().constructor);
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});
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});
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