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| 1 | +/** |
| 2 | + * Copyright (c) Facebook, Inc. and its affiliates. |
| 3 | + * |
| 4 | + * This source code is licensed under the MIT license found in the |
| 5 | + * LICENSE file in the root directory of this source tree. |
| 6 | + * |
| 7 | + * @emails react-core |
| 8 | + */ |
| 9 | + |
| 10 | +'use strict'; |
| 11 | + |
| 12 | +let JSDOM; |
| 13 | +let Stream; |
| 14 | +let React; |
| 15 | +let ReactDOMClient; |
| 16 | +let ReactDOMFizzStatic; |
| 17 | +let Suspense; |
| 18 | +let textCache; |
| 19 | +let document; |
| 20 | +let writable; |
| 21 | +let container; |
| 22 | +let buffer = ''; |
| 23 | +let hasErrored = false; |
| 24 | +let fatalError = undefined; |
| 25 | + |
| 26 | +describe('ReactDOMFizzStatic', () => { |
| 27 | + beforeEach(() => { |
| 28 | + jest.resetModules(); |
| 29 | + JSDOM = require('jsdom').JSDOM; |
| 30 | + React = require('react'); |
| 31 | + ReactDOMClient = require('react-dom/client'); |
| 32 | + ReactDOMFizzStatic = require('react-dom/static'); |
| 33 | + Stream = require('stream'); |
| 34 | + Suspense = React.Suspense; |
| 35 | + |
| 36 | + textCache = new Map(); |
| 37 | + |
| 38 | + // Test Environment |
| 39 | + const jsdom = new JSDOM( |
| 40 | + '<!DOCTYPE html><html><head></head><body><div id="container">', |
| 41 | + { |
| 42 | + runScripts: 'dangerously', |
| 43 | + }, |
| 44 | + ); |
| 45 | + document = jsdom.window.document; |
| 46 | + container = document.getElementById('container'); |
| 47 | + |
| 48 | + buffer = ''; |
| 49 | + hasErrored = false; |
| 50 | + |
| 51 | + writable = new Stream.PassThrough(); |
| 52 | + writable.setEncoding('utf8'); |
| 53 | + writable.on('data', chunk => { |
| 54 | + buffer += chunk; |
| 55 | + }); |
| 56 | + writable.on('error', error => { |
| 57 | + hasErrored = true; |
| 58 | + fatalError = error; |
| 59 | + }); |
| 60 | + }); |
| 61 | + |
| 62 | + async function act(callback) { |
| 63 | + await callback(); |
| 64 | + // Await one turn around the event loop. |
| 65 | + // This assumes that we'll flush everything we have so far. |
| 66 | + await new Promise(resolve => { |
| 67 | + setImmediate(resolve); |
| 68 | + }); |
| 69 | + if (hasErrored) { |
| 70 | + throw fatalError; |
| 71 | + } |
| 72 | + // JSDOM doesn't support stream HTML parser so we need to give it a proper fragment. |
| 73 | + // We also want to execute any scripts that are embedded. |
| 74 | + // We assume that we have now received a proper fragment of HTML. |
| 75 | + const bufferedContent = buffer; |
| 76 | + buffer = ''; |
| 77 | + const fakeBody = document.createElement('body'); |
| 78 | + fakeBody.innerHTML = bufferedContent; |
| 79 | + while (fakeBody.firstChild) { |
| 80 | + const node = fakeBody.firstChild; |
| 81 | + if (node.nodeName === 'SCRIPT') { |
| 82 | + const script = document.createElement('script'); |
| 83 | + script.textContent = node.textContent; |
| 84 | + fakeBody.removeChild(node); |
| 85 | + container.appendChild(script); |
| 86 | + } else { |
| 87 | + container.appendChild(node); |
| 88 | + } |
| 89 | + } |
| 90 | + } |
| 91 | + |
| 92 | + function getVisibleChildren(element) { |
| 93 | + const children = []; |
| 94 | + let node = element.firstChild; |
| 95 | + while (node) { |
| 96 | + if (node.nodeType === 1) { |
| 97 | + if ( |
| 98 | + node.tagName !== 'SCRIPT' && |
| 99 | + node.tagName !== 'TEMPLATE' && |
| 100 | + node.tagName !== 'template' && |
| 101 | + !node.hasAttribute('hidden') && |
| 102 | + !node.hasAttribute('aria-hidden') |
| 103 | + ) { |
| 104 | + const props = {}; |
| 105 | + const attributes = node.attributes; |
| 106 | + for (let i = 0; i < attributes.length; i++) { |
| 107 | + if ( |
| 108 | + attributes[i].name === 'id' && |
| 109 | + attributes[i].value.includes(':') |
| 110 | + ) { |
| 111 | + // We assume this is a React added ID that's a non-visual implementation detail. |
| 112 | + continue; |
| 113 | + } |
| 114 | + props[attributes[i].name] = attributes[i].value; |
| 115 | + } |
| 116 | + props.children = getVisibleChildren(node); |
| 117 | + children.push(React.createElement(node.tagName.toLowerCase(), props)); |
| 118 | + } |
| 119 | + } else if (node.nodeType === 3) { |
| 120 | + children.push(node.data); |
| 121 | + } |
| 122 | + node = node.nextSibling; |
| 123 | + } |
| 124 | + return children.length === 0 |
| 125 | + ? undefined |
| 126 | + : children.length === 1 |
| 127 | + ? children[0] |
| 128 | + : children; |
| 129 | + } |
| 130 | + |
| 131 | + function resolveText(text) { |
| 132 | + const record = textCache.get(text); |
| 133 | + if (record === undefined) { |
| 134 | + const newRecord = { |
| 135 | + status: 'resolved', |
| 136 | + value: text, |
| 137 | + }; |
| 138 | + textCache.set(text, newRecord); |
| 139 | + } else if (record.status === 'pending') { |
| 140 | + const thenable = record.value; |
| 141 | + record.status = 'resolved'; |
| 142 | + record.value = text; |
| 143 | + thenable.pings.forEach(t => t()); |
| 144 | + } |
| 145 | + } |
| 146 | + |
| 147 | + /* |
| 148 | + function rejectText(text, error) { |
| 149 | + const record = textCache.get(text); |
| 150 | + if (record === undefined) { |
| 151 | + const newRecord = { |
| 152 | + status: 'rejected', |
| 153 | + value: error, |
| 154 | + }; |
| 155 | + textCache.set(text, newRecord); |
| 156 | + } else if (record.status === 'pending') { |
| 157 | + const thenable = record.value; |
| 158 | + record.status = 'rejected'; |
| 159 | + record.value = error; |
| 160 | + thenable.pings.forEach(t => t()); |
| 161 | + } |
| 162 | + } |
| 163 | + */ |
| 164 | + |
| 165 | + function readText(text) { |
| 166 | + const record = textCache.get(text); |
| 167 | + if (record !== undefined) { |
| 168 | + switch (record.status) { |
| 169 | + case 'pending': |
| 170 | + throw record.value; |
| 171 | + case 'rejected': |
| 172 | + throw record.value; |
| 173 | + case 'resolved': |
| 174 | + return record.value; |
| 175 | + } |
| 176 | + } else { |
| 177 | + const thenable = { |
| 178 | + pings: [], |
| 179 | + then(resolve) { |
| 180 | + if (newRecord.status === 'pending') { |
| 181 | + thenable.pings.push(resolve); |
| 182 | + } else { |
| 183 | + Promise.resolve().then(() => resolve(newRecord.value)); |
| 184 | + } |
| 185 | + }, |
| 186 | + }; |
| 187 | + |
| 188 | + const newRecord = { |
| 189 | + status: 'pending', |
| 190 | + value: thenable, |
| 191 | + }; |
| 192 | + textCache.set(text, newRecord); |
| 193 | + |
| 194 | + throw thenable; |
| 195 | + } |
| 196 | + } |
| 197 | + |
| 198 | + function Text({text}) { |
| 199 | + return text; |
| 200 | + } |
| 201 | + |
| 202 | + function AsyncText({text}) { |
| 203 | + return readText(text); |
| 204 | + } |
| 205 | + |
| 206 | + it('should render a fully static document, send it and then hydrate it', async () => { |
| 207 | + function App() { |
| 208 | + return ( |
| 209 | + <div> |
| 210 | + <Suspense fallback={<Text text="Loading..." />}> |
| 211 | + <AsyncText text="Hello" /> |
| 212 | + </Suspense> |
| 213 | + </div> |
| 214 | + ); |
| 215 | + } |
| 216 | + |
| 217 | + const promise = ReactDOMFizzStatic.prerenderToNodeStreams(<App />); |
| 218 | + |
| 219 | + resolveText('Hello'); |
| 220 | + |
| 221 | + const result = await promise; |
| 222 | + |
| 223 | + await act(async () => { |
| 224 | + result.prelude.pipe(writable); |
| 225 | + }); |
| 226 | + expect(getVisibleChildren(container)).toEqual(<div>Hello</div>); |
| 227 | + |
| 228 | + await act(async () => { |
| 229 | + ReactDOMClient.hydrateRoot(container, <App />); |
| 230 | + }); |
| 231 | + |
| 232 | + expect(getVisibleChildren(container)).toEqual(<div>Hello</div>); |
| 233 | + }); |
| 234 | +}); |
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