| 1 | let React; |
| 2 | let ReactTestRenderer; |
| 3 | let Scheduler; |
| 4 | let Suspense; |
| 5 | let lazy; |
| 6 | let waitFor; |
| 7 | let waitForAll; |
| 8 | let waitForThrow; |
| 9 | let assertLog; |
| 10 | let assertConsoleErrorDev; |
| 11 | let act; |
| 12 | |
| 13 | let fakeModuleCache; |
| 14 | |
| 15 | function normalizeCodeLocInfo(str) { |
| 16 | return ( |
| 17 | str && |
| 18 | str.replace(/\n +(?:at|in) ([\S]+)[^\n]*/g, function (m, name) { |
| 19 | return '\n in ' + name + ' (at **)'; |
| 20 | }) |
| 21 | ); |
| 22 | } |
| 23 | |
| 24 | describe('ReactLazy', () => { |
| 25 | beforeEach(() => { |
| 26 | jest.resetModules(); |
| 27 | React = require('react'); |
| 28 | Suspense = React.Suspense; |
| 29 | lazy = React.lazy; |
| 30 | ReactTestRenderer = require('react-test-renderer'); |
| 31 | Scheduler = require('scheduler'); |
| 32 | |
| 33 | const InternalTestUtils = require('internal-test-utils'); |
| 34 | waitFor = InternalTestUtils.waitFor; |
| 35 | waitForAll = InternalTestUtils.waitForAll; |
| 36 | waitForThrow = InternalTestUtils.waitForThrow; |
| 37 | assertLog = InternalTestUtils.assertLog; |
| 38 | assertConsoleErrorDev = InternalTestUtils.assertConsoleErrorDev; |
| 39 | act = InternalTestUtils.act; |
| 40 | |
| 41 | fakeModuleCache = new Map(); |
| 42 | }); |
| 43 | |
| 44 | function Text(props) { |
| 45 | Scheduler.log(props.text); |
| 46 | return props.text; |
| 47 | } |
| 48 | |
| 49 | async function fakeImport(Component) { |
| 50 | const record = fakeModuleCache.get(Component); |
| 51 | if (record === undefined) { |
| 52 | const newRecord = { |
| 53 | status: 'pending', |
| 54 | value: {default: Component}, |
| 55 | pings: [], |
| 56 | then(ping) { |
| 57 | switch (newRecord.status) { |
| 58 | case 'pending': { |
| 59 | newRecord.pings.push(ping); |
| 60 | return; |
| 61 | } |
| 62 | case 'resolved': { |
| 63 | ping(newRecord.value); |
| 64 | return; |
| 65 | } |
| 66 | case 'rejected': { |
| 67 | throw newRecord.value; |
| 68 | } |
| 69 | } |
| 70 | }, |
| 71 | }; |
| 72 | fakeModuleCache.set(Component, newRecord); |
| 73 | return newRecord; |
| 74 | } |
| 75 | return record; |
| 76 | } |
| 77 | |
| 78 | function resolveFakeImport(moduleName) { |
| 79 | const record = fakeModuleCache.get(moduleName); |
| 80 | if (record === undefined) { |
| 81 | throw new Error('Module not found'); |
| 82 | } |
| 83 | if (record.status !== 'pending') { |
| 84 | throw new Error('Module already resolved'); |
| 85 | } |
| 86 | record.status = 'resolved'; |
| 87 | record.pings.forEach(ping => ping(record.value)); |
| 88 | } |
| 89 | |
| 90 | it('suspends until module has loaded', async () => { |
| 91 | const LazyText = lazy(() => fakeImport(Text)); |
| 92 | |
| 93 | const root = ReactTestRenderer.create( |
| 94 | <Suspense fallback={<Text text="Loading..." />}> |
| 95 | <LazyText text="Hi" /> |
| 96 | </Suspense>, |
| 97 | { |
| 98 | unstable_isConcurrent: true, |
| 99 | }, |
| 100 | ); |
| 101 | |
| 102 | await waitForAll(['Loading...']); |
| 103 | expect(root).not.toMatchRenderedOutput('Hi'); |
| 104 | |
| 105 | await act(() => resolveFakeImport(Text)); |
| 106 | assertLog(['Hi']); |
| 107 | expect(root).toMatchRenderedOutput('Hi'); |
| 108 | |
| 109 | // Should not suspend on update |
| 110 | root.update( |
| 111 | <Suspense fallback={<Text text="Loading..." />}> |
| 112 | <LazyText text="Hi again" /> |
| 113 | </Suspense>, |
| 114 | ); |
| 115 | await waitForAll(['Hi again']); |
| 116 | expect(root).toMatchRenderedOutput('Hi again'); |
| 117 | }); |
| 118 | |
| 119 | it('renders a lazy context provider', async () => { |
| 120 | const Context = React.createContext('default'); |
| 121 | function ConsumerText() { |
| 122 | return <Text text={React.useContext(Context)} />; |
| 123 | } |
| 124 | // Context.Provider === Context, so we can lazy-load the context itself |
| 125 | const LazyProvider = lazy(() => fakeImport(Context)); |
| 126 | |
| 127 | const root = ReactTestRenderer.create( |
| 128 | <Suspense fallback={<Text text="Loading..." />}> |
| 129 | <LazyProvider value="Hi"> |
| 130 | <ConsumerText /> |
| 131 | </LazyProvider> |
| 132 | </Suspense>, |
| 133 | { |
| 134 | unstable_isConcurrent: true, |
| 135 | }, |
| 136 | ); |
| 137 | |
| 138 | await waitForAll(['Loading...']); |
| 139 | expect(root).not.toMatchRenderedOutput('Hi'); |
| 140 | |
| 141 | await act(() => resolveFakeImport(Context)); |
| 142 | assertLog(['Hi']); |
| 143 | expect(root).toMatchRenderedOutput('Hi'); |
| 144 | |
| 145 | // Should not suspend on update |
| 146 | root.update( |
| 147 | <Suspense fallback={<Text text="Loading..." />}> |
| 148 | <LazyProvider value="Hi again"> |
| 149 | <ConsumerText /> |
| 150 | </LazyProvider> |
| 151 | </Suspense>, |
| 152 | ); |
| 153 | await waitForAll(['Hi again']); |
| 154 | expect(root).toMatchRenderedOutput('Hi again'); |
| 155 | }); |
| 156 | |
| 157 | it('can resolve synchronously without suspending', async () => { |
| 158 | const LazyText = lazy(() => ({ |
| 159 | then(cb) { |
| 160 | cb({default: Text}); |
| 161 | }, |
| 162 | })); |
| 163 | |
| 164 | let root; |
| 165 | await act(() => { |
| 166 | root = ReactTestRenderer.create( |
| 167 | <Suspense fallback={<Text text="Loading..." />}> |
| 168 | <LazyText text="Hi" /> |
| 169 | </Suspense>, |
| 170 | {unstable_isConcurrent: true}, |
| 171 | ); |
| 172 | }); |
| 173 | |
| 174 | assertLog(['Hi']); |
| 175 | expect(root).toMatchRenderedOutput('Hi'); |
| 176 | }); |
| 177 | |
| 178 | it('can reject synchronously without suspending', async () => { |
| 179 | const LazyText = lazy(() => ({ |
| 180 | then(resolve, reject) { |
| 181 | reject(new Error('oh no')); |
| 182 | }, |
| 183 | })); |
| 184 | |
| 185 | class ErrorBoundary extends React.Component { |
| 186 | state = {}; |
| 187 | static getDerivedStateFromError(error) { |
| 188 | return {message: error.message}; |
| 189 | } |
| 190 | render() { |
| 191 | return this.state.message |
| 192 | ? `Error: ${this.state.message}` |
| 193 | : this.props.children; |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | let root; |
| 198 | await act(() => { |
| 199 | root = ReactTestRenderer.create( |
| 200 | <ErrorBoundary> |
| 201 | <Suspense fallback={<Text text="Loading..." />}> |
| 202 | <LazyText text="Hi" /> |
| 203 | </Suspense> |
| 204 | </ErrorBoundary>, |
| 205 | {unstable_isConcurrent: true}, |
| 206 | ); |
| 207 | }); |
| 208 | assertLog([]); |
| 209 | expect(root).toMatchRenderedOutput('Error: oh no'); |
| 210 | }); |
| 211 | |
| 212 | it('multiple lazy components', async () => { |
| 213 | function Foo() { |
| 214 | return <Text text="Foo" />; |
| 215 | } |
| 216 | |
| 217 | function Bar() { |
| 218 | return <Text text="Bar" />; |
| 219 | } |
| 220 | |
| 221 | const LazyFoo = lazy(() => fakeImport(Foo)); |
| 222 | const LazyBar = lazy(() => fakeImport(Bar)); |
| 223 | |
| 224 | const root = ReactTestRenderer.create( |
| 225 | <Suspense fallback={<Text text="Loading..." />}> |
| 226 | <LazyFoo /> |
| 227 | <LazyBar /> |
| 228 | </Suspense>, |
| 229 | { |
| 230 | unstable_isConcurrent: true, |
| 231 | }, |
| 232 | ); |
| 233 | |
| 234 | await waitForAll(['Loading...']); |
| 235 | expect(root).not.toMatchRenderedOutput('FooBar'); |
| 236 | |
| 237 | await resolveFakeImport(Foo); |
| 238 | |
| 239 | await waitForAll(['Foo']); |
| 240 | expect(root).not.toMatchRenderedOutput('FooBar'); |
| 241 | |
| 242 | await act(() => resolveFakeImport(Bar)); |
| 243 | assertLog(['Foo', 'Bar']); |
| 244 | expect(root).toMatchRenderedOutput('FooBar'); |
| 245 | }); |
| 246 | |
| 247 | it('does not support arbitrary promises, only module objects', async () => { |
| 248 | const LazyText = lazy(async () => Text); |
| 249 | |
| 250 | const root = ReactTestRenderer.create(null, { |
| 251 | unstable_isConcurrent: true, |
| 252 | }); |
| 253 | |
| 254 | function App() { |
| 255 | return ( |
| 256 | <Suspense fallback={<Text text="Loading..." />}> |
| 257 | <LazyText text="Hi" /> |
| 258 | </Suspense> |
| 259 | ); |
| 260 | } |
| 261 | |
| 262 | let error; |
| 263 | try { |
| 264 | await act(() => { |
| 265 | root.update(<App />); |
| 266 | }); |
| 267 | } catch (e) { |
| 268 | error = e; |
| 269 | } |
| 270 | |
| 271 | expect(error.message).toMatch('Element type is invalid'); |
| 272 | assertLog(['Loading...']); |
| 273 | assertConsoleErrorDev([ |
| 274 | 'lazy: Expected the result of a dynamic import() call. ' + |
| 275 | 'Instead received: function Text(props) {\n' + |
| 276 | ' Scheduler.log(props.text);\n' + |
| 277 | ' return props.text;\n' + |
| 278 | ' }\n\n' + |
| 279 | 'Your code should look like: \n ' + |
| 280 | "const MyComponent = lazy(() => import('./MyComponent'))\n" + |
| 281 | ' in App (at **)', |
| 282 | 'lazy: Expected the result of a dynamic import() call. ' + |
| 283 | 'Instead received: function Text(props) {\n' + |
| 284 | ' Scheduler.log(props.text);\n' + |
| 285 | ' return props.text;\n' + |
| 286 | ' }\n\n' + |
| 287 | 'Your code should look like: \n ' + |
| 288 | "const MyComponent = lazy(() => import('./MyComponent'))\n" + |
| 289 | ' in App (at **)', |
| 290 | ]); |
| 291 | expect(root).not.toMatchRenderedOutput('Hi'); |
| 292 | }); |
| 293 | |
| 294 | it('throws if promise rejects', async () => { |
| 295 | const networkError = new Error('Bad network'); |
| 296 | const LazyText = lazy(async () => { |
| 297 | throw networkError; |
| 298 | }); |
| 299 | |
| 300 | const root = ReactTestRenderer.create(null, { |
| 301 | unstable_isConcurrent: true, |
| 302 | }); |
| 303 | |
| 304 | let error; |
| 305 | try { |
| 306 | await act(() => { |
| 307 | root.update( |
| 308 | <Suspense fallback={<Text text="Loading..." />}> |
| 309 | <LazyText text="Hi" /> |
| 310 | </Suspense>, |
| 311 | ); |
| 312 | }); |
| 313 | } catch (e) { |
| 314 | error = e; |
| 315 | } |
| 316 | |
| 317 | expect(error).toBe(networkError); |
| 318 | assertLog(['Loading...']); |
| 319 | expect(root).not.toMatchRenderedOutput('Hi'); |
| 320 | }); |
| 321 | |
| 322 | it('mount and reorder', async () => { |
| 323 | class Child extends React.Component { |
| 324 | componentDidMount() { |
| 325 | Scheduler.log('Did mount: ' + this.props.label); |
| 326 | } |
| 327 | componentDidUpdate() { |
| 328 | Scheduler.log('Did update: ' + this.props.label); |
| 329 | } |
| 330 | render() { |
| 331 | return <Text text={this.props.label} />; |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | const LazyChildA = lazy(() => { |
| 336 | Scheduler.log('Suspend! [LazyChildA]'); |
| 337 | return fakeImport(Child); |
| 338 | }); |
| 339 | const LazyChildB = lazy(() => { |
| 340 | Scheduler.log('Suspend! [LazyChildB]'); |
| 341 | return fakeImport(Child); |
| 342 | }); |
| 343 | |
| 344 | function Parent({swap}) { |
| 345 | return ( |
| 346 | <Suspense fallback={<Text text="Loading..." />}> |
| 347 | {swap |
| 348 | ? [ |
| 349 | <LazyChildB key="B" label="B" />, |
| 350 | <LazyChildA key="A" label="A" />, |
| 351 | ] |
| 352 | : [ |
| 353 | <LazyChildA key="A" label="A" />, |
| 354 | <LazyChildB key="B" label="B" />, |
| 355 | ]} |
| 356 | </Suspense> |
| 357 | ); |
| 358 | } |
| 359 | |
| 360 | const root = ReactTestRenderer.create(<Parent swap={false} />, { |
| 361 | unstable_isConcurrent: true, |
| 362 | }); |
| 363 | |
| 364 | await waitForAll([ |
| 365 | 'Suspend! [LazyChildA]', |
| 366 | 'Loading...', |
| 367 | // pre-warming |
| 368 | 'Suspend! [LazyChildB]', |
| 369 | ]); |
| 370 | expect(root).not.toMatchRenderedOutput('AB'); |
| 371 | |
| 372 | await act(async () => { |
| 373 | await resolveFakeImport(Child); |
| 374 | |
| 375 | // B suspends even though it happens to share the same import as A. |
| 376 | // TODO: React.lazy should implement the `status` and `value` fields, so |
| 377 | // we can unwrap the result synchronously if it already loaded. Like `use`. |
| 378 | await waitFor([ |
| 379 | 'A', |
| 380 | // pre-warming: LazyChildB was already initialized. So it also already resolved |
| 381 | // when we called resolveFakeImport above. So it doesn't suspend again. |
| 382 | 'B', |
| 383 | ]); |
| 384 | }); |
| 385 | assertLog(['Did mount: A', 'Did mount: B']); |
| 386 | expect(root).toMatchRenderedOutput('AB'); |
| 387 | |
| 388 | // Swap the position of A and B |
| 389 | root.update(<Parent swap={true} />); |
| 390 | await waitForAll(['B', 'A', 'Did update: B', 'Did update: A']); |
| 391 | expect(root).toMatchRenderedOutput('BA'); |
| 392 | }); |
| 393 | |
| 394 | it('resolves defaultProps, on mount and update', async () => { |
| 395 | class T extends React.Component { |
| 396 | render() { |
| 397 | return <Text {...this.props} />; |
| 398 | } |
| 399 | } |
| 400 | T.defaultProps = {text: 'Hi'}; |
| 401 | const LazyText = lazy(() => fakeImport(T)); |
| 402 | |
| 403 | const root = ReactTestRenderer.create( |
| 404 | <Suspense fallback={<Text text="Loading..." />}> |
| 405 | <LazyText /> |
| 406 | </Suspense>, |
| 407 | { |
| 408 | unstable_isConcurrent: true, |
| 409 | }, |
| 410 | ); |
| 411 | |
| 412 | await waitForAll(['Loading...']); |
| 413 | expect(root).not.toMatchRenderedOutput('Hi'); |
| 414 | |
| 415 | await act(() => resolveFakeImport(T)); |
| 416 | assertLog(['Hi']); |
| 417 | |
| 418 | expect(root).toMatchRenderedOutput('Hi'); |
| 419 | |
| 420 | T.defaultProps = {text: 'Hi again'}; |
| 421 | root.update( |
| 422 | <Suspense fallback={<Text text="Loading..." />}> |
| 423 | <LazyText /> |
| 424 | </Suspense>, |
| 425 | ); |
| 426 | await waitForAll(['Hi again']); |
| 427 | expect(root).toMatchRenderedOutput('Hi again'); |
| 428 | }); |
| 429 | |
| 430 | it('resolves defaultProps without breaking memoization', async () => { |
| 431 | class LazyImpl extends React.Component { |
| 432 | render() { |
| 433 | Scheduler.log('Lazy'); |
| 434 | return ( |
| 435 | <> |
| 436 | <Text text={this.props.siblingText} /> |
| 437 | {this.props.children} |
| 438 | </> |
| 439 | ); |
| 440 | } |
| 441 | } |
| 442 | LazyImpl.defaultProps = {siblingText: 'Sibling'}; |
| 443 | const Lazy = lazy(() => fakeImport(LazyImpl)); |
| 444 | |
| 445 | class Stateful extends React.Component { |
| 446 | state = {text: 'A'}; |
| 447 | render() { |
| 448 | return <Text text={this.state.text} />; |
| 449 | } |
| 450 | } |
| 451 | |
| 452 | const stateful = React.createRef(null); |
| 453 | |
| 454 | const root = ReactTestRenderer.create( |
| 455 | <Suspense fallback={<Text text="Loading..." />}> |
| 456 | <Lazy> |
| 457 | <Stateful ref={stateful} /> |
| 458 | </Lazy> |
| 459 | </Suspense>, |
| 460 | { |
| 461 | unstable_isConcurrent: true, |
| 462 | }, |
| 463 | ); |
| 464 | await waitForAll(['Loading...']); |
| 465 | expect(root).not.toMatchRenderedOutput('SiblingA'); |
| 466 | |
| 467 | await act(() => resolveFakeImport(LazyImpl)); |
| 468 | assertLog(['Lazy', 'Sibling', 'A']); |
| 469 | |
| 470 | expect(root).toMatchRenderedOutput('SiblingA'); |
| 471 | |
| 472 | // Lazy should not re-render |
| 473 | stateful.current.setState({text: 'B'}); |
| 474 | await waitForAll(['B']); |
| 475 | expect(root).toMatchRenderedOutput('SiblingB'); |
| 476 | }); |
| 477 | |
| 478 | it('resolves defaultProps without breaking bailout due to unchanged props and state, #17151', async () => { |
| 479 | class LazyImpl extends React.Component { |
| 480 | static defaultProps = {value: 0}; |
| 481 | |
| 482 | render() { |
| 483 | const text = `${this.props.label}: ${this.props.value}`; |
| 484 | return <Text text={text} />; |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | const Lazy = lazy(() => fakeImport(LazyImpl)); |
| 489 | |
| 490 | const instance1 = React.createRef(null); |
| 491 | const instance2 = React.createRef(null); |
| 492 | |
| 493 | const root = ReactTestRenderer.create( |
| 494 | <> |
| 495 | <LazyImpl ref={instance1} label="Not lazy" /> |
| 496 | <Suspense fallback={<Text text="Loading..." />}> |
| 497 | <Lazy ref={instance2} label="Lazy" /> |
| 498 | </Suspense> |
| 499 | </>, |
| 500 | { |
| 501 | unstable_isConcurrent: true, |
| 502 | }, |
| 503 | ); |
| 504 | await waitForAll(['Not lazy: 0', 'Loading...']); |
| 505 | expect(root).not.toMatchRenderedOutput('Not lazy: 0Lazy: 0'); |
| 506 | |
| 507 | await act(() => resolveFakeImport(LazyImpl)); |
| 508 | assertLog(['Lazy: 0']); |
| 509 | expect(root).toMatchRenderedOutput('Not lazy: 0Lazy: 0'); |
| 510 | |
| 511 | // Should bailout due to unchanged props and state |
| 512 | instance1.current.setState(null); |
| 513 | await waitForAll([]); |
| 514 | expect(root).toMatchRenderedOutput('Not lazy: 0Lazy: 0'); |
| 515 | |
| 516 | // Should bailout due to unchanged props and state |
| 517 | instance2.current.setState(null); |
| 518 | await waitForAll([]); |
| 519 | expect(root).toMatchRenderedOutput('Not lazy: 0Lazy: 0'); |
| 520 | }); |
| 521 | |
| 522 | it('resolves defaultProps without breaking bailout in PureComponent, #17151', async () => { |
| 523 | class LazyImpl extends React.PureComponent { |
| 524 | static defaultProps = {value: 0}; |
| 525 | state = {}; |
| 526 | |
| 527 | render() { |
| 528 | const text = `${this.props.label}: ${this.props.value}`; |
| 529 | return <Text text={text} />; |
| 530 | } |
| 531 | } |
| 532 | |
| 533 | const Lazy = lazy(() => fakeImport(LazyImpl)); |
| 534 | |
| 535 | const instance1 = React.createRef(null); |
| 536 | const instance2 = React.createRef(null); |
| 537 | |
| 538 | const root = ReactTestRenderer.create( |
| 539 | <> |
| 540 | <LazyImpl ref={instance1} label="Not lazy" /> |
| 541 | <Suspense fallback={<Text text="Loading..." />}> |
| 542 | <Lazy ref={instance2} label="Lazy" /> |
| 543 | </Suspense> |
| 544 | </>, |
| 545 | { |
| 546 | unstable_isConcurrent: true, |
| 547 | }, |
| 548 | ); |
| 549 | await waitForAll(['Not lazy: 0', 'Loading...']); |
| 550 | expect(root).not.toMatchRenderedOutput('Not lazy: 0Lazy: 0'); |
| 551 | |
| 552 | await act(() => resolveFakeImport(LazyImpl)); |
| 553 | assertLog(['Lazy: 0']); |
| 554 | expect(root).toMatchRenderedOutput('Not lazy: 0Lazy: 0'); |
| 555 | |
| 556 | // Should bailout due to shallow equal props and state |
| 557 | instance1.current.setState({}); |
| 558 | await waitForAll([]); |
| 559 | expect(root).toMatchRenderedOutput('Not lazy: 0Lazy: 0'); |
| 560 | |
| 561 | // Should bailout due to shallow equal props and state |
| 562 | instance2.current.setState({}); |
| 563 | await waitForAll([]); |
| 564 | expect(root).toMatchRenderedOutput('Not lazy: 0Lazy: 0'); |
| 565 | }); |
| 566 | |
| 567 | it('sets defaultProps for modern lifecycles', async () => { |
| 568 | class C extends React.Component { |
| 569 | static defaultProps = {text: 'A'}; |
| 570 | state = {}; |
| 571 | |
| 572 | static getDerivedStateFromProps(props) { |
| 573 | Scheduler.log(`getDerivedStateFromProps: ${props.text}`); |
| 574 | return null; |
| 575 | } |
| 576 | |
| 577 | constructor(props) { |
| 578 | super(props); |
| 579 | Scheduler.log(`constructor: ${this.props.text}`); |
| 580 | } |
| 581 | |
| 582 | componentDidMount() { |
| 583 | Scheduler.log(`componentDidMount: ${this.props.text}`); |
| 584 | } |
| 585 | |
| 586 | componentDidUpdate(prevProps) { |
| 587 | Scheduler.log( |
| 588 | `componentDidUpdate: ${prevProps.text} -> ${this.props.text}`, |
| 589 | ); |
| 590 | } |
| 591 | |
| 592 | componentWillUnmount() { |
| 593 | Scheduler.log(`componentWillUnmount: ${this.props.text}`); |
| 594 | } |
| 595 | |
| 596 | shouldComponentUpdate(nextProps) { |
| 597 | Scheduler.log( |
| 598 | `shouldComponentUpdate: ${this.props.text} -> ${nextProps.text}`, |
| 599 | ); |
| 600 | return true; |
| 601 | } |
| 602 | |
| 603 | getSnapshotBeforeUpdate(prevProps) { |
| 604 | Scheduler.log( |
| 605 | `getSnapshotBeforeUpdate: ${prevProps.text} -> ${this.props.text}`, |
| 606 | ); |
| 607 | return null; |
| 608 | } |
| 609 | |
| 610 | render() { |
| 611 | return <Text text={this.props.text + this.props.num} />; |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | const LazyClass = lazy(() => fakeImport(C)); |
| 616 | |
| 617 | const root = ReactTestRenderer.create( |
| 618 | <Suspense fallback={<Text text="Loading..." />}> |
| 619 | <LazyClass num={1} /> |
| 620 | </Suspense>, |
| 621 | { |
| 622 | unstable_isConcurrent: true, |
| 623 | }, |
| 624 | ); |
| 625 | |
| 626 | await waitForAll(['Loading...']); |
| 627 | expect(root).not.toMatchRenderedOutput('A1'); |
| 628 | |
| 629 | await act(() => resolveFakeImport(C)); |
| 630 | assertLog([ |
| 631 | 'constructor: A', |
| 632 | 'getDerivedStateFromProps: A', |
| 633 | 'A1', |
| 634 | 'componentDidMount: A', |
| 635 | ]); |
| 636 | |
| 637 | root.update( |
| 638 | <Suspense fallback={<Text text="Loading..." />}> |
| 639 | <LazyClass num={2} /> |
| 640 | </Suspense>, |
| 641 | ); |
| 642 | await waitForAll([ |
| 643 | 'getDerivedStateFromProps: A', |
| 644 | 'shouldComponentUpdate: A -> A', |
| 645 | 'A2', |
| 646 | 'getSnapshotBeforeUpdate: A -> A', |
| 647 | 'componentDidUpdate: A -> A', |
| 648 | ]); |
| 649 | expect(root).toMatchRenderedOutput('A2'); |
| 650 | |
| 651 | root.update( |
| 652 | <Suspense fallback={<Text text="Loading..." />}> |
| 653 | <LazyClass num={3} /> |
| 654 | </Suspense>, |
| 655 | ); |
| 656 | await waitForAll([ |
| 657 | 'getDerivedStateFromProps: A', |
| 658 | 'shouldComponentUpdate: A -> A', |
| 659 | 'A3', |
| 660 | 'getSnapshotBeforeUpdate: A -> A', |
| 661 | 'componentDidUpdate: A -> A', |
| 662 | ]); |
| 663 | expect(root).toMatchRenderedOutput('A3'); |
| 664 | }); |
| 665 | |
| 666 | it('sets defaultProps for legacy lifecycles', async () => { |
| 667 | class C extends React.Component { |
| 668 | static defaultProps = {text: 'A'}; |
| 669 | state = {}; |
| 670 | |
| 671 | UNSAFE_componentWillMount() { |
| 672 | Scheduler.log(`UNSAFE_componentWillMount: ${this.props.text}`); |
| 673 | } |
| 674 | |
| 675 | UNSAFE_componentWillUpdate(nextProps) { |
| 676 | Scheduler.log( |
| 677 | `UNSAFE_componentWillUpdate: ${this.props.text} -> ${nextProps.text}`, |
| 678 | ); |
| 679 | } |
| 680 | |
| 681 | UNSAFE_componentWillReceiveProps(nextProps) { |
| 682 | Scheduler.log( |
| 683 | `UNSAFE_componentWillReceiveProps: ${this.props.text} -> ${nextProps.text}`, |
| 684 | ); |
| 685 | } |
| 686 | |
| 687 | render() { |
| 688 | return <Text text={this.props.text + this.props.num} />; |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | const LazyClass = lazy(() => fakeImport(C)); |
| 693 | |
| 694 | let root; |
| 695 | await act(() => { |
| 696 | root = ReactTestRenderer.create( |
| 697 | <Suspense fallback={<Text text="Loading..." />}> |
| 698 | <LazyClass num={1} /> |
| 699 | </Suspense>, |
| 700 | {unstable_isConcurrent: true}, |
| 701 | ); |
| 702 | }); |
| 703 | |
| 704 | assertLog(['Loading...']); |
| 705 | await waitForAll([]); |
| 706 | expect(root).toMatchRenderedOutput('Loading...'); |
| 707 | |
| 708 | await resolveFakeImport(C); |
| 709 | |
| 710 | assertLog([]); |
| 711 | |
| 712 | await act(() => { |
| 713 | root.update( |
| 714 | <Suspense fallback={<Text text="Loading..." />}> |
| 715 | <LazyClass num={2} /> |
| 716 | </Suspense>, |
| 717 | ); |
| 718 | }); |
| 719 | |
| 720 | assertLog(['UNSAFE_componentWillMount: A', 'A2']); |
| 721 | expect(root).toMatchRenderedOutput('A2'); |
| 722 | |
| 723 | await act(() => { |
| 724 | root.update( |
| 725 | <Suspense fallback={<Text text="Loading..." />}> |
| 726 | <LazyClass num={3} /> |
| 727 | </Suspense>, |
| 728 | ); |
| 729 | }); |
| 730 | assertLog([ |
| 731 | 'UNSAFE_componentWillReceiveProps: A -> A', |
| 732 | 'UNSAFE_componentWillUpdate: A -> A', |
| 733 | 'A3', |
| 734 | ]); |
| 735 | await waitForAll([]); |
| 736 | expect(root).toMatchRenderedOutput('A3'); |
| 737 | }); |
| 738 | |
| 739 | it('throws with a useful error when wrapping invalid type with lazy()', async () => { |
| 740 | const BadLazy = lazy(() => fakeImport(42)); |
| 741 | |
| 742 | const root = ReactTestRenderer.create( |
| 743 | <Suspense fallback={<Text text="Loading..." />}> |
| 744 | <BadLazy /> |
| 745 | </Suspense>, |
| 746 | { |
| 747 | unstable_isConcurrent: true, |
| 748 | }, |
| 749 | ); |
| 750 | |
| 751 | await waitForAll(['Loading...']); |
| 752 | |
| 753 | await resolveFakeImport(42); |
| 754 | root.update( |
| 755 | <Suspense fallback={<Text text="Loading..." />}> |
| 756 | <BadLazy /> |
| 757 | </Suspense>, |
| 758 | ); |
| 759 | await waitForThrow( |
| 760 | 'Element type is invalid. Received a promise that resolves to: 42. ' + |
| 761 | 'Lazy element type must resolve to a class or function.', |
| 762 | ); |
| 763 | }); |
| 764 | |
| 765 | it('throws with a useful error when wrapping Fragment with lazy()', async () => { |
| 766 | const BadLazy = lazy(() => fakeImport(React.Fragment)); |
| 767 | |
| 768 | const root = ReactTestRenderer.create( |
| 769 | <Suspense fallback={<Text text="Loading..." />}> |
| 770 | <BadLazy /> |
| 771 | </Suspense>, |
| 772 | { |
| 773 | unstable_isConcurrent: true, |
| 774 | }, |
| 775 | ); |
| 776 | |
| 777 | await waitForAll(['Loading...']); |
| 778 | |
| 779 | await resolveFakeImport(React.Fragment); |
| 780 | root.update( |
| 781 | <Suspense fallback={<Text text="Loading..." />}> |
| 782 | <BadLazy /> |
| 783 | </Suspense>, |
| 784 | ); |
| 785 | await waitForThrow( |
| 786 | 'Element type is invalid. Received a promise that resolves to: Fragment. ' + |
| 787 | 'Lazy element type must resolve to a class or function.', |
| 788 | ); |
| 789 | }); |
| 790 | |
| 791 | // @gate !fb |
| 792 | it('throws with a useful error when wrapping createPortal with lazy()', async () => { |
| 793 | const ReactDOM = require('react-dom'); |
| 794 | const container = document.createElement('div'); |
| 795 | const portal = ReactDOM.createPortal(<div />, container); |
| 796 | const BadLazy = lazy(() => fakeImport(portal)); |
| 797 | |
| 798 | const root = ReactTestRenderer.create( |
| 799 | <Suspense fallback={<Text text="Loading..." />}> |
| 800 | <BadLazy /> |
| 801 | </Suspense>, |
| 802 | { |
| 803 | unstable_isConcurrent: true, |
| 804 | }, |
| 805 | ); |
| 806 | |
| 807 | await waitForAll(['Loading...']); |
| 808 | |
| 809 | await resolveFakeImport(portal); |
| 810 | root.update( |
| 811 | <Suspense fallback={<Text text="Loading..." />}> |
| 812 | <BadLazy /> |
| 813 | </Suspense>, |
| 814 | ); |
| 815 | await waitForThrow( |
| 816 | 'Element type is invalid. Received a promise that resolves to: Portal. ' + |
| 817 | 'Lazy element type must resolve to a class or function.', |
| 818 | ); |
| 819 | }); |
| 820 | |
| 821 | it('throws with a useful error when wrapping Profiler with lazy()', async () => { |
| 822 | const BadLazy = lazy(() => fakeImport(React.Profiler)); |
| 823 | |
| 824 | const root = ReactTestRenderer.create( |
| 825 | <Suspense fallback={<Text text="Loading..." />}> |
| 826 | <BadLazy /> |
| 827 | </Suspense>, |
| 828 | { |
| 829 | unstable_isConcurrent: true, |
| 830 | }, |
| 831 | ); |
| 832 | |
| 833 | await waitForAll(['Loading...']); |
| 834 | |
| 835 | await resolveFakeImport(React.Profiler); |
| 836 | root.update( |
| 837 | <Suspense fallback={<Text text="Loading..." />}> |
| 838 | <BadLazy /> |
| 839 | </Suspense>, |
| 840 | ); |
| 841 | await waitForThrow( |
| 842 | 'Element type is invalid. Received a promise that resolves to: Profiler. ' + |
| 843 | 'Lazy element type must resolve to a class or function.', |
| 844 | ); |
| 845 | }); |
| 846 | |
| 847 | it('throws with a useful error when wrapping StrictMode with lazy()', async () => { |
| 848 | const BadLazy = lazy(() => fakeImport(React.StrictMode)); |
| 849 | |
| 850 | const root = ReactTestRenderer.create( |
| 851 | <Suspense fallback={<Text text="Loading..." />}> |
| 852 | <BadLazy /> |
| 853 | </Suspense>, |
| 854 | { |
| 855 | unstable_isConcurrent: true, |
| 856 | }, |
| 857 | ); |
| 858 | |
| 859 | await waitForAll(['Loading...']); |
| 860 | |
| 861 | await resolveFakeImport(React.StrictMode); |
| 862 | root.update( |
| 863 | <Suspense fallback={<Text text="Loading..." />}> |
| 864 | <BadLazy /> |
| 865 | </Suspense>, |
| 866 | ); |
| 867 | await waitForThrow( |
| 868 | 'Element type is invalid. Received a promise that resolves to: StrictMode. ' + |
| 869 | 'Lazy element type must resolve to a class or function.', |
| 870 | ); |
| 871 | }); |
| 872 | |
| 873 | it('throws with a useful error when wrapping Suspense with lazy()', async () => { |
| 874 | const BadLazy = lazy(() => fakeImport(React.Suspense)); |
| 875 | |
| 876 | const root = ReactTestRenderer.create( |
| 877 | <Suspense fallback={<Text text="Loading..." />}> |
| 878 | <BadLazy /> |
| 879 | </Suspense>, |
| 880 | { |
| 881 | unstable_isConcurrent: true, |
| 882 | }, |
| 883 | ); |
| 884 | |
| 885 | await waitForAll(['Loading...']); |
| 886 | |
| 887 | await resolveFakeImport(React.Suspense); |
| 888 | root.update( |
| 889 | <Suspense fallback={<Text text="Loading..." />}> |
| 890 | <BadLazy /> |
| 891 | </Suspense>, |
| 892 | ); |
| 893 | await waitForThrow( |
| 894 | 'Element type is invalid. Received a promise that resolves to: Suspense. ' + |
| 895 | 'Lazy element type must resolve to a class or function.', |
| 896 | ); |
| 897 | }); |
| 898 | |
| 899 | it('renders a lazy context provider without value prop', async () => { |
| 900 | // Context providers work when wrapped in lazy() |
| 901 | const Context = React.createContext('default'); |
| 902 | const LazyProvider = lazy(() => fakeImport(Context)); |
| 903 | |
| 904 | function ConsumerText() { |
| 905 | return <Text text={React.useContext(Context)} />; |
| 906 | } |
| 907 | |
| 908 | const root = ReactTestRenderer.create( |
| 909 | <Suspense fallback={<Text text="Loading..." />}> |
| 910 | <LazyProvider value="provided"> |
| 911 | <ConsumerText /> |
| 912 | </LazyProvider> |
| 913 | </Suspense>, |
| 914 | { |
| 915 | unstable_isConcurrent: true, |
| 916 | }, |
| 917 | ); |
| 918 | |
| 919 | await waitForAll(['Loading...']); |
| 920 | |
| 921 | await act(() => resolveFakeImport(Context)); |
| 922 | assertLog(['provided']); |
| 923 | expect(root).toMatchRenderedOutput('provided'); |
| 924 | }); |
| 925 | |
| 926 | it('throws with a useful error when wrapping Context.Consumer with lazy()', async () => { |
| 927 | const Context = React.createContext(null); |
| 928 | const BadLazy = lazy(() => fakeImport(Context.Consumer)); |
| 929 | |
| 930 | const root = ReactTestRenderer.create( |
| 931 | <Suspense fallback={<Text text="Loading..." />}> |
| 932 | <BadLazy /> |
| 933 | </Suspense>, |
| 934 | { |
| 935 | unstable_isConcurrent: true, |
| 936 | }, |
| 937 | ); |
| 938 | |
| 939 | await waitForAll(['Loading...']); |
| 940 | |
| 941 | await resolveFakeImport(Context.Consumer); |
| 942 | root.update( |
| 943 | <Suspense fallback={<Text text="Loading..." />}> |
| 944 | <BadLazy /> |
| 945 | </Suspense>, |
| 946 | ); |
| 947 | await waitForThrow( |
| 948 | 'Element type is invalid. Received a promise that resolves to: Context.Consumer. ' + |
| 949 | 'Lazy element type must resolve to a class or function.', |
| 950 | ); |
| 951 | }); |
| 952 | |
| 953 | // @gate enableSuspenseList |
| 954 | it('throws with a useful error when wrapping SuspenseList with lazy()', async () => { |
| 955 | const BadLazy = lazy(() => fakeImport(React.unstable_SuspenseList)); |
| 956 | |
| 957 | const root = ReactTestRenderer.create( |
| 958 | <Suspense fallback={<Text text="Loading..." />}> |
| 959 | <BadLazy /> |
| 960 | </Suspense>, |
| 961 | { |
| 962 | unstable_isConcurrent: true, |
| 963 | }, |
| 964 | ); |
| 965 | |
| 966 | await waitForAll(['Loading...']); |
| 967 | |
| 968 | await resolveFakeImport(React.unstable_SuspenseList); |
| 969 | root.update( |
| 970 | <Suspense fallback={<Text text="Loading..." />}> |
| 971 | <BadLazy /> |
| 972 | </Suspense>, |
| 973 | ); |
| 974 | await waitForThrow( |
| 975 | 'Element type is invalid. Received a promise that resolves to: SuspenseList. ' + |
| 976 | 'Lazy element type must resolve to a class or function.', |
| 977 | ); |
| 978 | }); |
| 979 | |
| 980 | // @gate enableViewTransition |
| 981 | it('throws with a useful error when wrapping ViewTransition with lazy()', async () => { |
| 982 | const BadLazy = lazy(() => fakeImport(React.ViewTransition)); |
| 983 | |
| 984 | const root = ReactTestRenderer.create( |
| 985 | <Suspense fallback={<Text text="Loading..." />}> |
| 986 | <BadLazy /> |
| 987 | </Suspense>, |
| 988 | { |
| 989 | unstable_isConcurrent: true, |
| 990 | }, |
| 991 | ); |
| 992 | |
| 993 | await waitForAll(['Loading...']); |
| 994 | |
| 995 | await resolveFakeImport(React.ViewTransition); |
| 996 | root.update( |
| 997 | <Suspense fallback={<Text text="Loading..." />}> |
| 998 | <BadLazy /> |
| 999 | </Suspense>, |
| 1000 | ); |
| 1001 | await waitForThrow( |
| 1002 | 'Element type is invalid. Received a promise that resolves to: ViewTransition. ' + |
| 1003 | 'Lazy element type must resolve to a class or function.', |
| 1004 | ); |
| 1005 | }); |
| 1006 | |
| 1007 | it('throws with a useful error when wrapping Activity with lazy()', async () => { |
| 1008 | const BadLazy = lazy(() => fakeImport(React.Activity)); |
| 1009 | |
| 1010 | const root = ReactTestRenderer.create( |
| 1011 | <Suspense fallback={<Text text="Loading..." />}> |
| 1012 | <BadLazy /> |
| 1013 | </Suspense>, |
| 1014 | { |
| 1015 | unstable_isConcurrent: true, |
| 1016 | }, |
| 1017 | ); |
| 1018 | |
| 1019 | await waitForAll(['Loading...']); |
| 1020 | |
| 1021 | await resolveFakeImport(React.Activity); |
| 1022 | root.update( |
| 1023 | <Suspense fallback={<Text text="Loading..." />}> |
| 1024 | <BadLazy /> |
| 1025 | </Suspense>, |
| 1026 | ); |
| 1027 | await waitForThrow( |
| 1028 | 'Element type is invalid. Received a promise that resolves to: Activity. ' + |
| 1029 | 'Lazy element type must resolve to a class or function.', |
| 1030 | ); |
| 1031 | }); |
| 1032 | |
| 1033 | // @gate enableTransitionTracing |
| 1034 | it('throws with a useful error when wrapping TracingMarker with lazy()', async () => { |
| 1035 | const BadLazy = lazy(() => fakeImport(React.unstable_TracingMarker)); |
| 1036 | |
| 1037 | const root = ReactTestRenderer.create( |
| 1038 | <Suspense fallback={<Text text="Loading..." />}> |
| 1039 | <BadLazy /> |
| 1040 | </Suspense>, |
| 1041 | { |
| 1042 | unstable_isConcurrent: true, |
| 1043 | }, |
| 1044 | ); |
| 1045 | |
| 1046 | await waitForAll(['Loading...']); |
| 1047 | |
| 1048 | await resolveFakeImport(React.unstable_TracingMarker); |
| 1049 | root.update( |
| 1050 | <Suspense fallback={<Text text="Loading..." />}> |
| 1051 | <BadLazy /> |
| 1052 | </Suspense>, |
| 1053 | ); |
| 1054 | await waitForThrow( |
| 1055 | 'Element type is invalid. Received a promise that resolves to: TracingMarker. ' + |
| 1056 | 'Lazy element type must resolve to a class or function.', |
| 1057 | ); |
| 1058 | }); |
| 1059 | |
| 1060 | it('throws with a useful error when wrapping lazy() multiple times', async () => { |
| 1061 | const Lazy1 = lazy(() => fakeImport(Text)); |
| 1062 | const Lazy2 = lazy(() => fakeImport(Lazy1)); |
| 1063 | |
| 1064 | const root = ReactTestRenderer.create( |
| 1065 | <Suspense fallback={<Text text="Loading..." />}> |
| 1066 | <Lazy2 text="Hello" /> |
| 1067 | </Suspense>, |
| 1068 | { |
| 1069 | unstable_isConcurrent: true, |
| 1070 | }, |
| 1071 | ); |
| 1072 | |
| 1073 | await waitForAll(['Loading...']); |
| 1074 | expect(root).not.toMatchRenderedOutput('Hello'); |
| 1075 | |
| 1076 | await resolveFakeImport(Lazy1); |
| 1077 | root.update( |
| 1078 | <Suspense fallback={<Text text="Loading..." />}> |
| 1079 | <Lazy2 text="Hello" /> |
| 1080 | </Suspense>, |
| 1081 | ); |
| 1082 | await waitForThrow( |
| 1083 | 'Element type is invalid. Received a promise that resolves to: [object Object]. ' + |
| 1084 | 'Lazy element type must resolve to a class or function.' + |
| 1085 | (__DEV__ |
| 1086 | ? ' Did you wrap a component in React.lazy() more than once?' |
| 1087 | : ''), |
| 1088 | ); |
| 1089 | }); |
| 1090 | |
| 1091 | it('resolves props for function component without defaultProps', async () => { |
| 1092 | function Add(props) { |
| 1093 | return props.inner + props.outer; |
| 1094 | } |
| 1095 | const LazyAdd = lazy(() => fakeImport(Add)); |
| 1096 | const root = ReactTestRenderer.create( |
| 1097 | <Suspense fallback={<Text text="Loading..." />}> |
| 1098 | <LazyAdd inner="2" outer="2" /> |
| 1099 | </Suspense>, |
| 1100 | { |
| 1101 | unstable_isConcurrent: true, |
| 1102 | }, |
| 1103 | ); |
| 1104 | |
| 1105 | await waitForAll(['Loading...']); |
| 1106 | expect(root).not.toMatchRenderedOutput('22'); |
| 1107 | |
| 1108 | // Mount |
| 1109 | await act(() => resolveFakeImport(Add)); |
| 1110 | |
| 1111 | expect(root).toMatchRenderedOutput('22'); |
| 1112 | |
| 1113 | // Update |
| 1114 | root.update( |
| 1115 | <Suspense fallback={<Text text="Loading..." />}> |
| 1116 | <LazyAdd inner={false} outer={false} /> |
| 1117 | </Suspense>, |
| 1118 | ); |
| 1119 | await waitForAll([]); |
| 1120 | expect(root).toMatchRenderedOutput('0'); |
| 1121 | }); |
| 1122 | |
| 1123 | it('resolves props for class component with defaultProps', async () => { |
| 1124 | class Add extends React.Component { |
| 1125 | render() { |
| 1126 | expect(this.props.innerWithDefault).toBe(42); |
| 1127 | return this.props.inner + this.props.outer; |
| 1128 | } |
| 1129 | } |
| 1130 | Add.defaultProps = { |
| 1131 | innerWithDefault: 42, |
| 1132 | }; |
| 1133 | const LazyAdd = lazy(() => fakeImport(Add)); |
| 1134 | const root = ReactTestRenderer.create( |
| 1135 | <Suspense fallback={<Text text="Loading..." />}> |
| 1136 | <LazyAdd inner="2" outer="2" /> |
| 1137 | </Suspense>, |
| 1138 | { |
| 1139 | unstable_isConcurrent: true, |
| 1140 | }, |
| 1141 | ); |
| 1142 | |
| 1143 | await waitForAll(['Loading...']); |
| 1144 | expect(root).not.toMatchRenderedOutput('22'); |
| 1145 | |
| 1146 | // Mount |
| 1147 | await act(() => resolveFakeImport(Add)); |
| 1148 | |
| 1149 | expect(root).toMatchRenderedOutput('22'); |
| 1150 | |
| 1151 | // Update |
| 1152 | root.update( |
| 1153 | <Suspense fallback={<Text text="Loading..." />}> |
| 1154 | <LazyAdd inner={false} outer={false} /> |
| 1155 | </Suspense>, |
| 1156 | ); |
| 1157 | await waitForAll([]); |
| 1158 | expect(root).toMatchRenderedOutput('0'); |
| 1159 | }); |
| 1160 | |
| 1161 | it('resolves props for class component without defaultProps', async () => { |
| 1162 | class Add extends React.Component { |
| 1163 | render() { |
| 1164 | return this.props.inner + this.props.outer; |
| 1165 | } |
| 1166 | } |
| 1167 | const LazyAdd = lazy(() => fakeImport(Add)); |
| 1168 | const root = ReactTestRenderer.create( |
| 1169 | <Suspense fallback={<Text text="Loading..." />}> |
| 1170 | <LazyAdd inner="2" outer="2" /> |
| 1171 | </Suspense>, |
| 1172 | { |
| 1173 | unstable_isConcurrent: true, |
| 1174 | }, |
| 1175 | ); |
| 1176 | |
| 1177 | await waitForAll(['Loading...']); |
| 1178 | expect(root).not.toMatchRenderedOutput('22'); |
| 1179 | |
| 1180 | // Mount |
| 1181 | await act(() => resolveFakeImport(Add)); |
| 1182 | |
| 1183 | expect(root).toMatchRenderedOutput('22'); |
| 1184 | |
| 1185 | // Update |
| 1186 | root.update( |
| 1187 | <Suspense fallback={<Text text="Loading..." />}> |
| 1188 | <LazyAdd inner={false} outer={false} /> |
| 1189 | </Suspense>, |
| 1190 | ); |
| 1191 | await waitForAll([]); |
| 1192 | expect(root).toMatchRenderedOutput('0'); |
| 1193 | }); |
| 1194 | |
| 1195 | it('resolves props for forwardRef component without defaultProps', async () => { |
| 1196 | const Add = React.forwardRef((props, ref) => { |
| 1197 | return props.inner + props.outer; |
| 1198 | }); |
| 1199 | Add.displayName = 'Add'; |
| 1200 | |
| 1201 | const LazyAdd = lazy(() => fakeImport(Add)); |
| 1202 | const root = ReactTestRenderer.create( |
| 1203 | <Suspense fallback={<Text text="Loading..." />}> |
| 1204 | <LazyAdd inner="2" outer="2" /> |
| 1205 | </Suspense>, |
| 1206 | { |
| 1207 | unstable_isConcurrent: true, |
| 1208 | }, |
| 1209 | ); |
| 1210 | |
| 1211 | await waitForAll(['Loading...']); |
| 1212 | expect(root).not.toMatchRenderedOutput('22'); |
| 1213 | |
| 1214 | // Mount |
| 1215 | await act(() => resolveFakeImport(Add)); |
| 1216 | |
| 1217 | expect(root).toMatchRenderedOutput('22'); |
| 1218 | |
| 1219 | // Update |
| 1220 | root.update( |
| 1221 | <Suspense fallback={<Text text="Loading..." />}> |
| 1222 | <LazyAdd inner={false} outer={false} /> |
| 1223 | </Suspense>, |
| 1224 | ); |
| 1225 | await waitForAll([]); |
| 1226 | expect(root).toMatchRenderedOutput('0'); |
| 1227 | }); |
| 1228 | |
| 1229 | it('resolves props for outer memo component without defaultProps', async () => { |
| 1230 | let Add = props => { |
| 1231 | return props.inner + props.outer; |
| 1232 | }; |
| 1233 | Add = React.memo(Add); |
| 1234 | const LazyAdd = lazy(() => fakeImport(Add)); |
| 1235 | const root = ReactTestRenderer.create( |
| 1236 | <Suspense fallback={<Text text="Loading..." />}> |
| 1237 | <LazyAdd inner="2" outer="2" /> |
| 1238 | </Suspense>, |
| 1239 | { |
| 1240 | unstable_isConcurrent: true, |
| 1241 | }, |
| 1242 | ); |
| 1243 | |
| 1244 | await waitForAll(['Loading...']); |
| 1245 | expect(root).not.toMatchRenderedOutput('22'); |
| 1246 | |
| 1247 | // Mount |
| 1248 | await act(() => resolveFakeImport(Add)); |
| 1249 | |
| 1250 | expect(root).toMatchRenderedOutput('22'); |
| 1251 | |
| 1252 | // Update |
| 1253 | root.update( |
| 1254 | <Suspense fallback={<Text text="Loading..." />}> |
| 1255 | <LazyAdd inner={false} outer={false} /> |
| 1256 | </Suspense>, |
| 1257 | ); |
| 1258 | await waitForAll([]); |
| 1259 | expect(root).toMatchRenderedOutput('0'); |
| 1260 | }); |
| 1261 | |
| 1262 | it('resolves props for inner memo component without defaultProps', async () => { |
| 1263 | const Add = props => { |
| 1264 | return props.inner + props.outer; |
| 1265 | }; |
| 1266 | Add.displayName = 'Add'; |
| 1267 | const LazyAdd = lazy(() => fakeImport(Add)); |
| 1268 | const root = ReactTestRenderer.create( |
| 1269 | <Suspense fallback={<Text text="Loading..." />}> |
| 1270 | <LazyAdd inner="2" outer="2" /> |
| 1271 | </Suspense>, |
| 1272 | { |
| 1273 | unstable_isConcurrent: true, |
| 1274 | }, |
| 1275 | ); |
| 1276 | |
| 1277 | await waitForAll(['Loading...']); |
| 1278 | expect(root).not.toMatchRenderedOutput('22'); |
| 1279 | |
| 1280 | // Mount |
| 1281 | await act(() => resolveFakeImport(Add)); |
| 1282 | |
| 1283 | expect(root).toMatchRenderedOutput('22'); |
| 1284 | |
| 1285 | // Update |
| 1286 | root.update( |
| 1287 | <Suspense fallback={<Text text="Loading..." />}> |
| 1288 | <LazyAdd inner={false} outer={false} /> |
| 1289 | </Suspense>, |
| 1290 | ); |
| 1291 | await waitForAll([]); |
| 1292 | expect(root).toMatchRenderedOutput('0'); |
| 1293 | }); |
| 1294 | |
| 1295 | it('includes lazy-loaded component in warning stack', async () => { |
| 1296 | const Foo = props => <div>{[<Text text="A" />, <Text text="B" />]}</div>; |
| 1297 | const LazyFoo = lazy(() => { |
| 1298 | Scheduler.log('Started loading'); |
| 1299 | return fakeImport(Foo); |
| 1300 | }); |
| 1301 | |
| 1302 | const root = ReactTestRenderer.create( |
| 1303 | <Suspense fallback={<Text text="Loading..." />}> |
| 1304 | <LazyFoo /> |
| 1305 | </Suspense>, |
| 1306 | { |
| 1307 | unstable_isConcurrent: true, |
| 1308 | }, |
| 1309 | ); |
| 1310 | |
| 1311 | await waitForAll(['Started loading', 'Loading...']); |
| 1312 | expect(root).not.toMatchRenderedOutput(<div>AB</div>); |
| 1313 | |
| 1314 | await act(() => resolveFakeImport(Foo)); |
| 1315 | assertLog(['A', 'B']); |
| 1316 | assertConsoleErrorDev([ |
| 1317 | 'Each child in a list should have a unique "key" prop.\n' + |
| 1318 | '\n' + |
| 1319 | 'Check the render method of `Foo`. ' + |
| 1320 | 'See https://react.dev/link/warning-keys for more information.\n' + |
| 1321 | ' in Foo (at **)', |
| 1322 | ]); |
| 1323 | expect(root).toMatchRenderedOutput(<div>AB</div>); |
| 1324 | }); |
| 1325 | |
| 1326 | it('supports class and forwardRef components', async () => { |
| 1327 | class Foo extends React.Component { |
| 1328 | render() { |
| 1329 | return <Text text="Foo" />; |
| 1330 | } |
| 1331 | } |
| 1332 | const LazyClass = lazy(() => { |
| 1333 | return fakeImport(Foo); |
| 1334 | }); |
| 1335 | |
| 1336 | class Bar extends React.Component { |
| 1337 | render() { |
| 1338 | return <Text text="Bar" />; |
| 1339 | } |
| 1340 | } |
| 1341 | const ForwardRefBar = React.forwardRef((props, ref) => { |
| 1342 | Scheduler.log('forwardRef'); |
| 1343 | return <Bar ref={ref} />; |
| 1344 | }); |
| 1345 | |
| 1346 | const LazyForwardRef = lazy(() => { |
| 1347 | return fakeImport(ForwardRefBar); |
| 1348 | }); |
| 1349 | |
| 1350 | const ref = React.createRef(); |
| 1351 | const root = ReactTestRenderer.create( |
| 1352 | <Suspense fallback={<Text text="Loading..." />}> |
| 1353 | <LazyClass /> |
| 1354 | <LazyForwardRef ref={ref} /> |
| 1355 | </Suspense>, |
| 1356 | { |
| 1357 | unstable_isConcurrent: true, |
| 1358 | }, |
| 1359 | ); |
| 1360 | |
| 1361 | await waitForAll(['Loading...']); |
| 1362 | expect(root).not.toMatchRenderedOutput('FooBar'); |
| 1363 | expect(ref.current).toBe(null); |
| 1364 | |
| 1365 | await act(() => resolveFakeImport(Foo)); |
| 1366 | assertLog(['Foo']); |
| 1367 | |
| 1368 | await act(() => resolveFakeImport(ForwardRefBar)); |
| 1369 | assertLog(['Foo', 'forwardRef', 'Bar']); |
| 1370 | expect(root).toMatchRenderedOutput('FooBar'); |
| 1371 | expect(ref.current).not.toBe(null); |
| 1372 | }); |
| 1373 | |
| 1374 | it('should error with a component stack naming the resolved component', async () => { |
| 1375 | let componentStackMessage; |
| 1376 | |
| 1377 | function ResolvedText() { |
| 1378 | throw new Error('oh no'); |
| 1379 | } |
| 1380 | const LazyText = lazy(() => fakeImport(ResolvedText)); |
| 1381 | |
| 1382 | class ErrorBoundary extends React.Component { |
| 1383 | state = {error: null}; |
| 1384 | |
| 1385 | componentDidCatch(error, errMessage) { |
| 1386 | componentStackMessage = normalizeCodeLocInfo(errMessage.componentStack); |
| 1387 | this.setState({ |
| 1388 | error, |
| 1389 | }); |
| 1390 | } |
| 1391 | |
| 1392 | render() { |
| 1393 | return this.state.error ? null : this.props.children; |
| 1394 | } |
| 1395 | } |
| 1396 | |
| 1397 | ReactTestRenderer.create( |
| 1398 | <ErrorBoundary> |
| 1399 | <Suspense fallback={<Text text="Loading..." />}> |
| 1400 | <LazyText text="Hi" /> |
| 1401 | </Suspense> |
| 1402 | </ErrorBoundary>, |
| 1403 | {unstable_isConcurrent: true}, |
| 1404 | ); |
| 1405 | |
| 1406 | await waitForAll(['Loading...']); |
| 1407 | |
| 1408 | await act(() => resolveFakeImport(ResolvedText)); |
| 1409 | assertLog([]); |
| 1410 | |
| 1411 | expect(componentStackMessage).toContain('in ResolvedText'); |
| 1412 | }); |
| 1413 | |
| 1414 | it('should error with a component stack containing Lazy if unresolved', async () => { |
| 1415 | let componentStackMessage; |
| 1416 | |
| 1417 | const LazyText = lazy(() => ({ |
| 1418 | then(resolve, reject) { |
| 1419 | reject(new Error('oh no')); |
| 1420 | }, |
| 1421 | })); |
| 1422 | |
| 1423 | class ErrorBoundary extends React.Component { |
| 1424 | state = {error: null}; |
| 1425 | |
| 1426 | componentDidCatch(error, errMessage) { |
| 1427 | componentStackMessage = normalizeCodeLocInfo(errMessage.componentStack); |
| 1428 | this.setState({ |
| 1429 | error, |
| 1430 | }); |
| 1431 | } |
| 1432 | |
| 1433 | render() { |
| 1434 | return this.state.error ? null : this.props.children; |
| 1435 | } |
| 1436 | } |
| 1437 | |
| 1438 | await act(() => { |
| 1439 | ReactTestRenderer.create( |
| 1440 | <ErrorBoundary> |
| 1441 | <Suspense fallback={<Text text="Loading..." />}> |
| 1442 | <LazyText text="Hi" /> |
| 1443 | </Suspense> |
| 1444 | </ErrorBoundary>, |
| 1445 | {unstable_isConcurrent: true}, |
| 1446 | ); |
| 1447 | }); |
| 1448 | |
| 1449 | assertLog([]); |
| 1450 | |
| 1451 | expect(componentStackMessage).toContain('in Lazy'); |
| 1452 | }); |
| 1453 | |
| 1454 | it('mount and reorder lazy types', async () => { |
| 1455 | class Child extends React.Component { |
| 1456 | componentWillUnmount() { |
| 1457 | Scheduler.log('Did unmount: ' + this.props.label); |
| 1458 | } |
| 1459 | componentDidMount() { |
| 1460 | Scheduler.log('Did mount: ' + this.props.label); |
| 1461 | } |
| 1462 | componentDidUpdate() { |
| 1463 | Scheduler.log('Did update: ' + this.props.label); |
| 1464 | } |
| 1465 | render() { |
| 1466 | return <Text text={this.props.label} />; |
| 1467 | } |
| 1468 | } |
| 1469 | |
| 1470 | function ChildA({lowerCase}) { |
| 1471 | return <Child label={lowerCase ? 'a' : 'A'} />; |
| 1472 | } |
| 1473 | |
| 1474 | function ChildB({lowerCase}) { |
| 1475 | return <Child label={lowerCase ? 'b' : 'B'} />; |
| 1476 | } |
| 1477 | |
| 1478 | const LazyChildA = lazy(() => { |
| 1479 | Scheduler.log('Init A'); |
| 1480 | return fakeImport(ChildA); |
| 1481 | }); |
| 1482 | const LazyChildB = lazy(() => { |
| 1483 | Scheduler.log('Init B'); |
| 1484 | return fakeImport(ChildB); |
| 1485 | }); |
| 1486 | const LazyChildA2 = lazy(() => { |
| 1487 | Scheduler.log('Init A2'); |
| 1488 | return fakeImport(ChildA); |
| 1489 | }); |
| 1490 | let resolveB2; |
| 1491 | const LazyChildB2 = lazy(() => { |
| 1492 | Scheduler.log('Init B2'); |
| 1493 | return new Promise(r => { |
| 1494 | resolveB2 = r; |
| 1495 | }); |
| 1496 | }); |
| 1497 | |
| 1498 | function Parent({swap}) { |
| 1499 | return ( |
| 1500 | <Suspense fallback={<Text text="Outer..." />}> |
| 1501 | <Suspense fallback={<Text text="Loading..." />}> |
| 1502 | {swap |
| 1503 | ? [ |
| 1504 | <LazyChildB2 key="B" lowerCase={true} />, |
| 1505 | <LazyChildA2 key="A" lowerCase={true} />, |
| 1506 | ] |
| 1507 | : [<LazyChildA key="A" />, <LazyChildB key="B" />]} |
| 1508 | </Suspense> |
| 1509 | </Suspense> |
| 1510 | ); |
| 1511 | } |
| 1512 | |
| 1513 | const root = ReactTestRenderer.create(<Parent swap={false} />, { |
| 1514 | unstable_isConcurrent: true, |
| 1515 | }); |
| 1516 | |
| 1517 | await waitForAll([ |
| 1518 | 'Init A', |
| 1519 | 'Loading...', |
| 1520 | // pre-warming |
| 1521 | 'Init B', |
| 1522 | ]); |
| 1523 | expect(root).not.toMatchRenderedOutput('AB'); |
| 1524 | |
| 1525 | await act(() => resolveFakeImport(ChildA)); |
| 1526 | assertLog(['A']); |
| 1527 | |
| 1528 | await act(() => resolveFakeImport(ChildB)); |
| 1529 | assertLog(['A', 'B', 'Did mount: A', 'Did mount: B']); |
| 1530 | expect(root).toMatchRenderedOutput('AB'); |
| 1531 | |
| 1532 | // Swap the position of A and B |
| 1533 | root.update(<Parent swap={true} />); |
| 1534 | await waitForAll([ |
| 1535 | 'Init B2', |
| 1536 | 'Loading...', |
| 1537 | 'Did unmount: A', |
| 1538 | 'Did unmount: B', |
| 1539 | ]); |
| 1540 | |
| 1541 | // The suspense boundary should've triggered now. |
| 1542 | expect(root).toMatchRenderedOutput('Loading...'); |
| 1543 | await act(() => resolveB2({default: ChildB})); |
| 1544 | |
| 1545 | // We need to flush to trigger the second one to load. |
| 1546 | assertLog(['Init A2', 'b', 'a', 'Did mount: b', 'Did mount: a']); |
| 1547 | expect(root).toMatchRenderedOutput('ba'); |
| 1548 | }); |
| 1549 | |
| 1550 | it('mount and reorder lazy elements', async () => { |
| 1551 | class Child extends React.Component { |
| 1552 | componentDidMount() { |
| 1553 | Scheduler.log('Did mount: ' + this.props.label); |
| 1554 | } |
| 1555 | componentDidUpdate() { |
| 1556 | Scheduler.log('Did update: ' + this.props.label); |
| 1557 | } |
| 1558 | render() { |
| 1559 | return <Text text={this.props.label} />; |
| 1560 | } |
| 1561 | } |
| 1562 | |
| 1563 | const ChildA = <Child key="A" label="A" />; |
| 1564 | const lazyChildA = lazy(() => { |
| 1565 | Scheduler.log('Init A'); |
| 1566 | return fakeImport(ChildA); |
| 1567 | }); |
| 1568 | const ChildB = <Child key="B" label="B" />; |
| 1569 | const lazyChildB = lazy(() => { |
| 1570 | Scheduler.log('Init B'); |
| 1571 | return fakeImport(ChildB); |
| 1572 | }); |
| 1573 | const ChildA2 = <Child key="A" label="a" />; |
| 1574 | const lazyChildA2 = lazy(() => { |
| 1575 | Scheduler.log('Init A2'); |
| 1576 | return fakeImport(ChildA2); |
| 1577 | }); |
| 1578 | const ChildB2 = <Child key="B" label="b" />; |
| 1579 | const lazyChildB2 = lazy(() => { |
| 1580 | Scheduler.log('Init B2'); |
| 1581 | return fakeImport(ChildB2); |
| 1582 | }); |
| 1583 | |
| 1584 | function Parent({swap}) { |
| 1585 | return ( |
| 1586 | <Suspense fallback={<Text text="Loading..." />}> |
| 1587 | {swap ? [lazyChildB2, lazyChildA2] : [lazyChildA, lazyChildB]} |
| 1588 | </Suspense> |
| 1589 | ); |
| 1590 | } |
| 1591 | |
| 1592 | const root = ReactTestRenderer.create(<Parent swap={false} />, { |
| 1593 | unstable_isConcurrent: true, |
| 1594 | }); |
| 1595 | |
| 1596 | await waitForAll(['Init A', 'Loading...']); |
| 1597 | expect(root).not.toMatchRenderedOutput('AB'); |
| 1598 | |
| 1599 | await act(() => resolveFakeImport(ChildA)); |
| 1600 | // We need to flush to trigger the B to load. |
| 1601 | await assertLog(['Init B']); |
| 1602 | await act(() => resolveFakeImport(ChildB)); |
| 1603 | assertLog(['A', 'B', 'Did mount: A', 'Did mount: B']); |
| 1604 | expect(root).toMatchRenderedOutput('AB'); |
| 1605 | |
| 1606 | // Swap the position of A and B |
| 1607 | React.startTransition(() => { |
| 1608 | root.update(<Parent swap={true} />); |
| 1609 | }); |
| 1610 | await waitForAll(['Init B2', 'Loading...']); |
| 1611 | await act(() => resolveFakeImport(ChildB2)); |
| 1612 | // We need to flush to trigger the second one to load. |
| 1613 | assertLog(['Init A2', 'Loading...']); |
| 1614 | await act(() => resolveFakeImport(ChildA2)); |
| 1615 | assertLog(['b', 'a', 'Did update: b', 'Did update: a']); |
| 1616 | expect(root).toMatchRenderedOutput('ba'); |
| 1617 | }); |
| 1618 | |
| 1619 | describe('legacy mode', () => { |
| 1620 | // @gate !disableLegacyMode |
| 1621 | it('mount and reorder lazy elements (legacy mode)', async () => { |
| 1622 | class Child extends React.Component { |
| 1623 | componentDidMount() { |
| 1624 | Scheduler.log('Did mount: ' + this.props.label); |
| 1625 | } |
| 1626 | componentDidUpdate() { |
| 1627 | Scheduler.log('Did update: ' + this.props.label); |
| 1628 | } |
| 1629 | render() { |
| 1630 | return <Text text={this.props.label} />; |
| 1631 | } |
| 1632 | } |
| 1633 | |
| 1634 | const ChildA = <Child key="A" label="A" />; |
| 1635 | const lazyChildA = lazy(() => { |
| 1636 | Scheduler.log('Init A'); |
| 1637 | return fakeImport(ChildA); |
| 1638 | }); |
| 1639 | const ChildB = <Child key="B" label="B" />; |
| 1640 | const lazyChildB = lazy(() => { |
| 1641 | Scheduler.log('Init B'); |
| 1642 | return fakeImport(ChildB); |
| 1643 | }); |
| 1644 | const ChildA2 = <Child key="A" label="a" />; |
| 1645 | const lazyChildA2 = lazy(() => { |
| 1646 | Scheduler.log('Init A2'); |
| 1647 | return fakeImport(ChildA2); |
| 1648 | }); |
| 1649 | const ChildB2 = <Child key="B" label="b" />; |
| 1650 | const lazyChildB2 = lazy(() => { |
| 1651 | Scheduler.log('Init B2'); |
| 1652 | return fakeImport(ChildB2); |
| 1653 | }); |
| 1654 | |
| 1655 | function Parent({swap}) { |
| 1656 | return ( |
| 1657 | <Suspense fallback={<Text text="Loading..." />}> |
| 1658 | {swap ? [lazyChildB2, lazyChildA2] : [lazyChildA, lazyChildB]} |
| 1659 | </Suspense> |
| 1660 | ); |
| 1661 | } |
| 1662 | |
| 1663 | const root = ReactTestRenderer.create(<Parent swap={false} />, { |
| 1664 | unstable_isConcurrent: false, |
| 1665 | }); |
| 1666 | |
| 1667 | assertLog(['Init A', 'Loading...']); |
| 1668 | expect(root).not.toMatchRenderedOutput('AB'); |
| 1669 | |
| 1670 | await resolveFakeImport(ChildA); |
| 1671 | // We need to flush to trigger the B to load. |
| 1672 | await waitForAll(['Init B']); |
| 1673 | await resolveFakeImport(ChildB); |
| 1674 | |
| 1675 | await waitForAll(['A', 'B', 'Did mount: A', 'Did mount: B']); |
| 1676 | expect(root).toMatchRenderedOutput('AB'); |
| 1677 | |
| 1678 | // Swap the position of A and B |
| 1679 | root.update(<Parent swap={true} />); |
| 1680 | assertLog(['Init B2', 'Loading...']); |
| 1681 | await resolveFakeImport(ChildB2); |
| 1682 | // We need to flush to trigger the second one to load. |
| 1683 | await waitForAll(['Init A2']); |
| 1684 | await resolveFakeImport(ChildA2); |
| 1685 | |
| 1686 | await waitForAll(['b', 'a', 'Did update: b', 'Did update: a']); |
| 1687 | expect(root).toMatchRenderedOutput('ba'); |
| 1688 | }); |
| 1689 | |
| 1690 | // @gate !disableLegacyMode |
| 1691 | it('mount and reorder lazy types (legacy mode)', async () => { |
| 1692 | class Child extends React.Component { |
| 1693 | componentDidMount() { |
| 1694 | Scheduler.log('Did mount: ' + this.props.label); |
| 1695 | } |
| 1696 | componentDidUpdate() { |
| 1697 | Scheduler.log('Did update: ' + this.props.label); |
| 1698 | } |
| 1699 | render() { |
| 1700 | return <Text text={this.props.label} />; |
| 1701 | } |
| 1702 | } |
| 1703 | |
| 1704 | function ChildA({lowerCase}) { |
| 1705 | return <Child label={lowerCase ? 'a' : 'A'} />; |
| 1706 | } |
| 1707 | |
| 1708 | function ChildB({lowerCase}) { |
| 1709 | return <Child label={lowerCase ? 'b' : 'B'} />; |
| 1710 | } |
| 1711 | |
| 1712 | const LazyChildA = lazy(() => { |
| 1713 | Scheduler.log('Init A'); |
| 1714 | return fakeImport(ChildA); |
| 1715 | }); |
| 1716 | const LazyChildB = lazy(() => { |
| 1717 | Scheduler.log('Init B'); |
| 1718 | return fakeImport(ChildB); |
| 1719 | }); |
| 1720 | const LazyChildA2 = lazy(() => { |
| 1721 | Scheduler.log('Init A2'); |
| 1722 | return fakeImport(ChildA); |
| 1723 | }); |
| 1724 | const LazyChildB2 = lazy(() => { |
| 1725 | Scheduler.log('Init B2'); |
| 1726 | return fakeImport(ChildB); |
| 1727 | }); |
| 1728 | |
| 1729 | function Parent({swap}) { |
| 1730 | return ( |
| 1731 | <Suspense fallback={<Text text="Outer..." />}> |
| 1732 | <Suspense fallback={<Text text="Loading..." />}> |
| 1733 | {swap |
| 1734 | ? [ |
| 1735 | <LazyChildB2 key="B" lowerCase={true} />, |
| 1736 | <LazyChildA2 key="A" lowerCase={true} />, |
| 1737 | ] |
| 1738 | : [<LazyChildA key="A" />, <LazyChildB key="B" />]} |
| 1739 | </Suspense> |
| 1740 | </Suspense> |
| 1741 | ); |
| 1742 | } |
| 1743 | |
| 1744 | const root = ReactTestRenderer.create(<Parent swap={false} />, { |
| 1745 | unstable_isConcurrent: false, |
| 1746 | }); |
| 1747 | |
| 1748 | assertLog(['Init A', 'Init B', 'Loading...']); |
| 1749 | expect(root).not.toMatchRenderedOutput('AB'); |
| 1750 | |
| 1751 | await resolveFakeImport(ChildA); |
| 1752 | await resolveFakeImport(ChildB); |
| 1753 | |
| 1754 | await waitForAll(['A', 'B', 'Did mount: A', 'Did mount: B']); |
| 1755 | expect(root).toMatchRenderedOutput('AB'); |
| 1756 | |
| 1757 | // Swap the position of A and B |
| 1758 | root.update(<Parent swap={true} />); |
| 1759 | assertLog(['Init B2', 'Loading...']); |
| 1760 | await waitForAll(['Init A2', 'b', 'a', 'Did update: b', 'Did update: a']); |
| 1761 | expect(root).toMatchRenderedOutput('ba'); |
| 1762 | }); |
| 1763 | }); |
| 1764 | }); |