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ReactDOMServerIntegrationNewContext-test.js
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ReactDOMServerIntegrationNewContext-test.js
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/**
* Copyright (c) 2013-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.
*
* @emails react-core
*/
'use strict';
const ReactDOMServerIntegrationUtils = require('./utils/ReactDOMServerIntegrationTestUtils');
let React;
let ReactDOM;
let ReactDOMServer;
function initModules() {
// Reset warning cache.
jest.resetModuleRegistry();
React = require('react');
ReactDOM = require('react-dom');
ReactDOMServer = require('react-dom/server');
// Make them available to the helpers.
return {
ReactDOM,
ReactDOMServer,
};
}
const {resetModules, itRenders} = ReactDOMServerIntegrationUtils(initModules);
describe('ReactDOMServerIntegration', () => {
beforeEach(() => {
resetModules();
});
describe('context', function() {
let PurpleContext, RedContext, Consumer;
beforeEach(() => {
let Context = React.createContext('none');
class Parent extends React.Component {
render() {
return (
<Context.Provider value={this.props.text}>
{this.props.children}
</Context.Provider>
);
}
}
Consumer = Context.Consumer;
PurpleContext = props => <Parent text="purple">{props.children}</Parent>;
RedContext = props => <Parent text="red">{props.children}</Parent>;
});
itRenders('class child with context', async render => {
class ClassChildWithContext extends React.Component {
render() {
return (
<div>
<Consumer>{text => text}</Consumer>
</div>
);
}
}
const e = await render(
<PurpleContext>
<ClassChildWithContext />
</PurpleContext>,
);
expect(e.textContent).toBe('purple');
});
itRenders('stateless child with context', async render => {
function StatelessChildWithContext(props) {
return <Consumer>{text => text}</Consumer>;
}
const e = await render(
<PurpleContext>
<StatelessChildWithContext />
</PurpleContext>,
);
expect(e.textContent).toBe('purple');
});
itRenders('class child with default context', async render => {
class ClassChildWithWrongContext extends React.Component {
render() {
return (
<div id="classWrongChild">
<Consumer>{text => text}</Consumer>
</div>
);
}
}
const e = await render(<ClassChildWithWrongContext />);
expect(e.textContent).toBe('none');
});
itRenders('stateless child with wrong context', async render => {
function StatelessChildWithWrongContext(props) {
return (
<div id="statelessWrongChild">
<Consumer>{text => text}</Consumer>
</div>
);
}
const e = await render(<StatelessChildWithWrongContext />);
expect(e.textContent).toBe('none');
});
itRenders('with context passed through to a grandchild', async render => {
function Grandchild(props) {
return (
<div>
<Consumer>{text => text}</Consumer>
</div>
);
}
const Child = props => <Grandchild />;
const e = await render(
<PurpleContext>
<Child />
</PurpleContext>,
);
expect(e.textContent).toBe('purple');
});
itRenders('a child context overriding a parent context', async render => {
const Grandchild = props => {
return (
<div>
<Consumer>{text => text}</Consumer>
</div>
);
};
const e = await render(
<PurpleContext>
<RedContext>
<Grandchild />
</RedContext>
</PurpleContext>,
);
expect(e.textContent).toBe('red');
});
itRenders('multiple contexts', async render => {
const Theme = React.createContext('dark');
const Language = React.createContext('french');
class Parent extends React.Component {
render() {
return (
<Theme.Provider value="light">
<Child />
</Theme.Provider>
);
}
}
function Child() {
return (
<Language.Provider value="english">
<Grandchild />
</Language.Provider>
);
}
const Grandchild = props => {
return (
<div>
<Theme.Consumer>
{theme => <div id="theme">{theme}</div>}
</Theme.Consumer>
<Language.Consumer>
{language => <div id="language">{language}</div>}
</Language.Consumer>
</div>
);
};
const e = await render(<Parent />);
expect(e.querySelector('#theme').textContent).toBe('light');
expect(e.querySelector('#language').textContent).toBe('english');
});
itRenders(
'nested context unwinding',
async render => {
const Theme = React.createContext('dark');
const Language = React.createContext('french');
const App = () => (
<div>
<Theme.Provider value="light">
<Language.Provider>
<Theme.Provider value="dark">
<Theme.Consumer>
{theme => <div id="theme1">{theme}</div>}
</Theme.Consumer>
</Theme.Provider>
<Theme.Consumer>
{theme => <div id="theme2">{theme}</div>}
</Theme.Consumer>
</Language.Provider>
</Theme.Provider>
</div>
);
let e = await render(<App />);
expect(e.querySelector('#theme1').textContent).toBe('dark');
expect(e.querySelector('#theme2').textContent).toBe('light');
},
);
});
});