mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Héctor Ramos
124 lines
3.4 KiB
JavaScript
124 lines
3.4 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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* @emails react-core
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*/
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'use strict';
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const React = require('react');
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const ReactDOM = require('react-dom');
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function expectWarnings(tags, warnings = [], withoutStack = 0) {
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tags = [...tags];
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warnings = [...warnings];
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let element = null;
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const containerTag = tags.shift();
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const container =
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containerTag === 'svg'
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? document.createElementNS('http://www.w3.org/2000/svg', containerTag)
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: document.createElement(containerTag);
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while (tags.length) {
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const Tag = tags.pop();
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element = <Tag>{element}</Tag>;
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}
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expect(() => ReactDOM.render(element, container)).toWarnDev(warnings, {
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withoutStack,
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});
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}
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describe('validateDOMNesting', () => {
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it('allows valid nestings', () => {
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expectWarnings(['table', 'tbody', 'tr', 'td', 'b']);
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expectWarnings(
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['body', 'datalist', 'option'],
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[
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'render(): Rendering components directly into document.body is discouraged',
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],
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1,
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);
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expectWarnings(['div', 'a', 'object', 'a']);
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expectWarnings(['div', 'p', 'button', 'p']);
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expectWarnings(['p', 'svg', 'foreignObject', 'p']);
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expectWarnings(['html', 'body', 'div']);
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// Invalid, but not changed by browser parsing so we allow them
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expectWarnings(['div', 'ul', 'ul', 'li']);
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expectWarnings(['div', 'label', 'div']);
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expectWarnings(['div', 'ul', 'li', 'section', 'li']);
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expectWarnings(['div', 'ul', 'li', 'dd', 'li']);
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});
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it('prevents problematic nestings', () => {
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expectWarnings(
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['a', 'a'],
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[
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'validateDOMNesting(...): <a> cannot appear as a descendant of <a>.\n' +
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' in a (at **)',
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],
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);
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expectWarnings(
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['form', 'form'],
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[
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'validateDOMNesting(...): <form> cannot appear as a descendant of <form>.\n' +
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' in form (at **)',
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],
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);
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expectWarnings(
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['p', 'p'],
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[
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'validateDOMNesting(...): <p> cannot appear as a descendant of <p>.\n' +
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' in p (at **)',
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],
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);
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expectWarnings(
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['table', 'tr'],
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[
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'validateDOMNesting(...): <tr> cannot appear as a child of <table>. ' +
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'Add a <tbody> to your code to match the DOM tree generated by the browser.\n' +
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' in tr (at **)',
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],
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);
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expectWarnings(
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['div', 'ul', 'li', 'div', 'li'],
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[
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'validateDOMNesting(...): <li> cannot appear as a descendant of <li>.\n' +
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' in li (at **)\n' +
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' in div (at **)\n' +
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' in li (at **)\n' +
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' in ul (at **)',
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],
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);
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expectWarnings(
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['div', 'html'],
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[
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'validateDOMNesting(...): <html> cannot appear as a child of <div>.\n' +
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' in html (at **)',
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],
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);
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expectWarnings(
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['body', 'body'],
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[
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'render(): Rendering components directly into document.body is discouraged',
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'validateDOMNesting(...): <body> cannot appear as a child of <body>.\n' +
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' in body (at **)',
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],
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1,
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);
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expectWarnings(
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['svg', 'foreignObject', 'body', 'p'],
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[
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'validateDOMNesting(...): <body> cannot appear as a child of <foreignObject>.\n' +
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' in body (at **)\n' +
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' in foreignObject (at **)',
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],
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);
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});
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});
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