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ReactDOMServerIntegrationBasic-test.js
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ReactDOMServerIntegrationBasic-test.js
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/**
* 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.
*
* @emails react-core
* @jest-environment node
*/
'use strict';
const ReactDOMServerIntegrationUtils = require('./utils/ReactDOMServerIntegrationTestUtils');
const TEXT_NODE_TYPE = 3;
let JSDOM;
let React;
let ReactDOM;
let ReactDOMServer;
let ReactTestUtils;
function initModules() {
// Reset warning cache.
jest.resetModules();
// Creating mixed environment for `react-dom` + `react-dom/server`
JSDOM = require('jsdom').JSDOM;
const jsdom = new JSDOM(
'<!DOCTYPE html><html><head></head><body><div id="container">',
{
runScripts: 'dangerously',
},
);
global.window = jsdom.window;
global.document = jsdom.window.document;
global.navigator = jsdom.window.navigator;
global.Node = jsdom.window.Node;
React = require('react');
ReactDOM = require('react-dom');
ReactDOMServer = require('react-dom/server');
ReactTestUtils = require('react-dom/test-utils');
// Make them available to the helpers.
return {
ReactDOM,
ReactDOMServer,
ReactTestUtils,
};
}
const {resetModules, itRenders} = ReactDOMServerIntegrationUtils(initModules);
describe('ReactDOMServerIntegration', () => {
beforeEach(() => {
resetModules();
});
describe('basic rendering', function() {
itRenders('a blank div', async render => {
const e = await render(<div />);
expect(e.tagName).toBe('DIV');
});
itRenders('a self-closing tag', async render => {
const e = await render(<br />);
expect(e.tagName).toBe('BR');
});
itRenders('a self-closing tag as a child', async render => {
const e = await render(
<div>
<br />
</div>,
);
expect(e.childNodes.length).toBe(1);
expect(e.firstChild.tagName).toBe('BR');
});
itRenders('a string', async render => {
const e = await render('Hello');
expect(e.nodeType).toBe(3);
expect(e.nodeValue).toMatch('Hello');
});
itRenders('a number', async render => {
const e = await render(42);
expect(e.nodeType).toBe(3);
expect(e.nodeValue).toMatch('42');
});
itRenders('an array with one child', async render => {
const e = await render([<div key={1}>text1</div>]);
const parent = e.parentNode;
expect(parent.childNodes[0].tagName).toBe('DIV');
});
itRenders('an array with several children', async render => {
const Header = props => {
return <p>header</p>;
};
const Footer = props => {
return [<h2 key={1}>footer</h2>, <h3 key={2}>about</h3>];
};
const e = await render([
<div key={1}>text1</div>,
<span key={2}>text2</span>,
<Header key={3} />,
<Footer key={4} />,
]);
const parent = e.parentNode;
expect(parent.childNodes[0].tagName).toBe('DIV');
expect(parent.childNodes[1].tagName).toBe('SPAN');
expect(parent.childNodes[2].tagName).toBe('P');
expect(parent.childNodes[3].tagName).toBe('H2');
expect(parent.childNodes[4].tagName).toBe('H3');
});
itRenders('a nested array', async render => {
const e = await render([
[<div key={1}>text1</div>],
<span key={1}>text2</span>,
[[[null, <p key={1} />], false]],
]);
const parent = e.parentNode;
expect(parent.childNodes[0].tagName).toBe('DIV');
expect(parent.childNodes[1].tagName).toBe('SPAN');
expect(parent.childNodes[2].tagName).toBe('P');
});
itRenders('an iterable', async render => {
const threeDivIterable = {
'@@iterator': function() {
let i = 0;
return {
next: function() {
if (i++ < 3) {
return {value: <div key={i} />, done: false};
} else {
return {value: undefined, done: true};
}
},
};
},
};
const e = await render(threeDivIterable);
const parent = e.parentNode;
expect(parent.childNodes.length).toBe(3);
expect(parent.childNodes[0].tagName).toBe('DIV');
expect(parent.childNodes[1].tagName).toBe('DIV');
expect(parent.childNodes[2].tagName).toBe('DIV');
});
itRenders('emptyish values', async render => {
const e = await render(0);
expect(e.nodeType).toBe(TEXT_NODE_TYPE);
expect(e.nodeValue).toMatch('0');
// Empty string is special because client renders a node
// but server returns empty HTML. So we compare parent text.
expect((await render(<div>{''}</div>)).textContent).toBe('');
expect(await render([])).toBe(null);
expect(await render(false)).toBe(null);
expect(await render(true)).toBe(null);
expect(await render(undefined)).toBe(null);
expect(await render([[[false]], undefined])).toBe(null);
});
});
});