| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and 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 | // These tests are based on ReactJSXElement-test, |
| 11 | // ReactJSXElementValidator-test, ReactComponent-test, |
| 12 | // and ReactElementJSX-test. |
| 13 | |
| 14 | jest.mock('react/jsx-runtime', () => require('./jsx-runtime'), {virtual: true}); |
| 15 | jest.mock('react/jsx-dev-runtime', () => require('./jsx-dev-runtime'), { |
| 16 | virtual: true, |
| 17 | }); |
| 18 | |
| 19 | let React = require('react'); |
| 20 | let ReactDOM = require('react-dom'); |
| 21 | let ReactTestUtils = { |
| 22 | renderIntoDocument(el) { |
| 23 | const container = document.createElement('div'); |
| 24 | return ReactDOM.render(el, container); |
| 25 | }, |
| 26 | }; |
| 27 | let PropTypes = React.PropTypes; |
| 28 | let Component = class Component extends React.Component { |
| 29 | render() { |
| 30 | return <div />; |
| 31 | } |
| 32 | }; |
| 33 | let RequiredPropComponent = class extends React.Component { |
| 34 | render() { |
| 35 | return <span>{this.props.prop}</span>; |
| 36 | } |
| 37 | }; |
| 38 | RequiredPropComponent.displayName = 'RequiredPropComponent'; |
| 39 | RequiredPropComponent.propTypes = {prop: PropTypes.string.isRequired}; |
| 40 | |
| 41 | it('works', () => { |
| 42 | const container = document.createElement('div'); |
| 43 | ReactDOM.render(<h1>hello</h1>, container); |
| 44 | expect(container.textContent).toBe('hello'); |
| 45 | }); |
| 46 | |
| 47 | it('returns a complete element according to spec', () => { |
| 48 | const element = <Component />; |
| 49 | expect(element.type).toBe(Component); |
| 50 | expect(element.key).toBe(null); |
| 51 | expect(element.ref).toBe(null); |
| 52 | const expectation = {}; |
| 53 | Object.freeze(expectation); |
| 54 | expect(element.props).toEqual(expectation); |
| 55 | }); |
| 56 | |
| 57 | it('allows a lower-case to be passed as the string type', () => { |
| 58 | const element = <div />; |
| 59 | expect(element.type).toBe('div'); |
| 60 | expect(element.key).toBe(null); |
| 61 | expect(element.ref).toBe(null); |
| 62 | const expectation = {}; |
| 63 | Object.freeze(expectation); |
| 64 | expect(element.props).toEqual(expectation); |
| 65 | }); |
| 66 | |
| 67 | it('allows a string to be passed as the type', () => { |
| 68 | const TagName = 'div'; |
| 69 | const element = <TagName />; |
| 70 | expect(element.type).toBe('div'); |
| 71 | expect(element.key).toBe(null); |
| 72 | expect(element.ref).toBe(null); |
| 73 | const expectation = {}; |
| 74 | Object.freeze(expectation); |
| 75 | expect(element.props).toEqual(expectation); |
| 76 | }); |
| 77 | |
| 78 | it('returns an immutable element', () => { |
| 79 | const element = <Component />; |
| 80 | if (process.env.NODE_ENV === 'development') { |
| 81 | expect(() => (element.type = 'div')).toThrow(); |
| 82 | } else { |
| 83 | expect(() => (element.type = 'div')).not.toThrow(); |
| 84 | } |
| 85 | }); |
| 86 | |
| 87 | it('does not reuse the object that is spread into props', () => { |
| 88 | const config = {foo: 1}; |
| 89 | const element = <Component {...config} />; |
| 90 | expect(element.props.foo).toBe(1); |
| 91 | config.foo = 2; |
| 92 | expect(element.props.foo).toBe(1); |
| 93 | }); |
| 94 | |
| 95 | it('extracts key and ref from the rest of the props', () => { |
| 96 | const element = <Component key="12" ref="34" foo="56" />; |
| 97 | expect(element.type).toBe(Component); |
| 98 | expect(element.key).toBe('12'); |
| 99 | expect(element.ref).toBe('34'); |
| 100 | const expectation = {foo: '56'}; |
| 101 | Object.freeze(expectation); |
| 102 | expect(element.props).toEqual(expectation); |
| 103 | }); |
| 104 | |
| 105 | it('coerces the key to a string', () => { |
| 106 | const element = <Component key={12} foo="56" />; |
| 107 | expect(element.type).toBe(Component); |
| 108 | expect(element.key).toBe('12'); |
| 109 | expect(element.ref).toBe(null); |
| 110 | const expectation = {foo: '56'}; |
| 111 | Object.freeze(expectation); |
| 112 | expect(element.props).toEqual(expectation); |
| 113 | }); |
| 114 | |
| 115 | it('merges JSX children onto the children prop', () => { |
| 116 | const a = 1; |
| 117 | const element = <Component children="text">{a}</Component>; |
| 118 | expect(element.props.children).toBe(a); |
| 119 | }); |
| 120 | |
| 121 | it('does not override children if no JSX children are provided', () => { |
| 122 | const element = <Component children="text" />; |
| 123 | expect(element.props.children).toBe('text'); |
| 124 | }); |
| 125 | |
| 126 | it('overrides children if null is provided as a JSX child', () => { |
| 127 | const element = <Component children="text">{null}</Component>; |
| 128 | expect(element.props.children).toBe(null); |
| 129 | }); |
| 130 | |
| 131 | it('overrides children if undefined is provided as an argument', () => { |
| 132 | const element = <Component children="text">{undefined}</Component>; |
| 133 | expect(element.props.children).toBe(undefined); |
| 134 | |
| 135 | const element2 = React.cloneElement( |
| 136 | <Component children="text" />, |
| 137 | {}, |
| 138 | undefined |
| 139 | ); |
| 140 | expect(element2.props.children).toBe(undefined); |
| 141 | }); |
| 142 | |
| 143 | it('merges JSX children onto the children prop in an array', () => { |
| 144 | const a = 1; |
| 145 | const b = 2; |
| 146 | const c = 3; |
| 147 | const element = ( |
| 148 | <Component> |
| 149 | {a} |
| 150 | {b} |
| 151 | {c} |
| 152 | </Component> |
| 153 | ); |
| 154 | expect(element.props.children).toEqual([1, 2, 3]); |
| 155 | }); |
| 156 | |
| 157 | it('allows static methods to be called using the type property', () => { |
| 158 | class StaticMethodComponent { |
| 159 | static someStaticMethod() { |
| 160 | return 'someReturnValue'; |
| 161 | } |
| 162 | render() { |
| 163 | return <div />; |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | const element = <StaticMethodComponent />; |
| 168 | expect(element.type.someStaticMethod()).toBe('someReturnValue'); |
| 169 | }); |
| 170 | |
| 171 | it('identifies valid elements', () => { |
| 172 | expect(React.isValidElement(<div />)).toEqual(true); |
| 173 | expect(React.isValidElement(<Component />)).toEqual(true); |
| 174 | |
| 175 | expect(React.isValidElement(null)).toEqual(false); |
| 176 | expect(React.isValidElement(true)).toEqual(false); |
| 177 | expect(React.isValidElement({})).toEqual(false); |
| 178 | expect(React.isValidElement('string')).toEqual(false); |
| 179 | expect(React.isValidElement(Component)).toEqual(false); |
| 180 | expect(React.isValidElement({type: 'div', props: {}})).toEqual(false); |
| 181 | }); |
| 182 | |
| 183 | it('is indistinguishable from a plain object', () => { |
| 184 | const element = <div className="foo" />; |
| 185 | const object = {}; |
| 186 | expect(element.constructor).toBe(object.constructor); |
| 187 | }); |
| 188 | |
| 189 | it('should use default prop value when removing a prop', () => { |
| 190 | Component.defaultProps = {fruit: 'persimmon'}; |
| 191 | |
| 192 | const container = document.createElement('div'); |
| 193 | const instance = ReactDOM.render(<Component fruit="mango" />, container); |
| 194 | expect(instance.props.fruit).toBe('mango'); |
| 195 | |
| 196 | ReactDOM.render(<Component />, container); |
| 197 | expect(instance.props.fruit).toBe('persimmon'); |
| 198 | }); |
| 199 | |
| 200 | it('should normalize props with default values', () => { |
| 201 | class NormalizingComponent extends React.Component { |
| 202 | render() { |
| 203 | return <span>{this.props.prop}</span>; |
| 204 | } |
| 205 | } |
| 206 | NormalizingComponent.defaultProps = {prop: 'testKey'}; |
| 207 | |
| 208 | const container = document.createElement('div'); |
| 209 | const instance = ReactDOM.render(<NormalizingComponent />, container); |
| 210 | expect(instance.props.prop).toBe('testKey'); |
| 211 | |
| 212 | const inst2 = ReactDOM.render( |
| 213 | <NormalizingComponent prop={null} />, |
| 214 | container |
| 215 | ); |
| 216 | expect(inst2.props.prop).toBe(null); |
| 217 | }); |
| 218 | |
| 219 | it('warns for keys for arrays of elements in children position', () => { |
| 220 | expect(() => |
| 221 | ReactTestUtils.renderIntoDocument( |
| 222 | <Component>{[<Component />, <Component />]}</Component> |
| 223 | ) |
| 224 | ).toErrorDev('Each child in a list should have a unique "key" prop.', { |
| 225 | withoutStack: true, |
| 226 | }); |
| 227 | }); |
| 228 | |
| 229 | it('warns for keys for arrays of elements with owner info', () => { |
| 230 | class InnerComponent extends React.Component { |
| 231 | render() { |
| 232 | return <Component>{this.props.childSet}</Component>; |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | class ComponentWrapper extends React.Component { |
| 237 | render() { |
| 238 | return <InnerComponent childSet={[<Component />, <Component />]} />; |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | expect(() => |
| 243 | ReactTestUtils.renderIntoDocument(<ComponentWrapper />) |
| 244 | ).toErrorDev( |
| 245 | 'Each child in a list should have a unique "key" prop.' + |
| 246 | '\n\nCheck the render method of `InnerComponent`. ' + |
| 247 | 'It was passed a child from ComponentWrapper. ', |
| 248 | {withoutStack: true} |
| 249 | ); |
| 250 | }); |
| 251 | |
| 252 | it('does not warn for arrays of elements with keys', () => { |
| 253 | ReactTestUtils.renderIntoDocument( |
| 254 | <Component>{[<Component key="#1" />, <Component key="#2" />]}</Component> |
| 255 | ); |
| 256 | }); |
| 257 | |
| 258 | it('does not warn for iterable elements with keys', () => { |
| 259 | const iterable = { |
| 260 | '@@iterator': function () { |
| 261 | let i = 0; |
| 262 | return { |
| 263 | next: function () { |
| 264 | const done = ++i > 2; |
| 265 | return { |
| 266 | value: done ? undefined : <Component key={'#' + i} />, |
| 267 | done: done, |
| 268 | }; |
| 269 | }, |
| 270 | }; |
| 271 | }, |
| 272 | }; |
| 273 | |
| 274 | ReactTestUtils.renderIntoDocument(<Component>{iterable}</Component>); |
| 275 | }); |
| 276 | |
| 277 | it('does not warn for numeric keys in entry iterable as a child', () => { |
| 278 | const iterable = { |
| 279 | '@@iterator': function () { |
| 280 | let i = 0; |
| 281 | return { |
| 282 | next: function () { |
| 283 | const done = ++i > 2; |
| 284 | return {value: done ? undefined : [i, <Component />], done: done}; |
| 285 | }, |
| 286 | }; |
| 287 | }, |
| 288 | }; |
| 289 | iterable.entries = iterable['@@iterator']; |
| 290 | |
| 291 | ReactTestUtils.renderIntoDocument(<Component>{iterable}</Component>); |
| 292 | }); |
| 293 | |
| 294 | it('does not warn when the element is directly as children', () => { |
| 295 | ReactTestUtils.renderIntoDocument( |
| 296 | <Component> |
| 297 | <Component /> |
| 298 | <Component /> |
| 299 | </Component> |
| 300 | ); |
| 301 | }); |
| 302 | |
| 303 | it('does not warn when the child array contains non-elements', () => { |
| 304 | void (<Component>{[{}, {}]}</Component>); |
| 305 | }); |
| 306 | |
| 307 | it('should give context for PropType errors in nested components.', () => { |
| 308 | // In this test, we're making sure that if a proptype error is found in a |
| 309 | // component, we give a small hint as to which parent instantiated that |
| 310 | // component as per warnings about key usage in ReactElementValidator. |
| 311 | function MyComp({color}) { |
| 312 | return <div>My color is {color}</div>; |
| 313 | } |
| 314 | MyComp.propTypes = { |
| 315 | color: PropTypes.string, |
| 316 | }; |
| 317 | class ParentComp extends React.Component { |
| 318 | render() { |
| 319 | return <MyComp color={123} />; |
| 320 | } |
| 321 | } |
| 322 | expect(() => ReactTestUtils.renderIntoDocument(<ParentComp />)).toErrorDev( |
| 323 | 'Warning: Failed prop type: ' + |
| 324 | 'Invalid prop `color` of type `number` supplied to `MyComp`, ' + |
| 325 | 'expected `string`.', |
| 326 | {withoutStack: true} |
| 327 | ); |
| 328 | }); |
| 329 | |
| 330 | it('gives a helpful error when passing null, undefined, or boolean', () => { |
| 331 | const Undefined = undefined; |
| 332 | const Null = null; |
| 333 | const True = true; |
| 334 | const Div = 'div'; |
| 335 | expect(() => void (<Undefined />)).toErrorDev( |
| 336 | 'Warning: React.jsx: type is invalid -- expected a string ' + |
| 337 | '(for built-in components) or a class/function (for composite ' + |
| 338 | 'components) but got: undefined. You likely forgot to export your ' + |
| 339 | "component from the file it's defined in, or you might have mixed up " + |
| 340 | 'default and named imports.' + |
| 341 | (process.env.BABEL_ENV === 'development' |
| 342 | ? '\n\nCheck your code at **.' |
| 343 | : ''), |
| 344 | {withoutStack: true} |
| 345 | ); |
| 346 | expect(() => void (<Null />)).toErrorDev( |
| 347 | 'Warning: React.jsx: type is invalid -- expected a string ' + |
| 348 | '(for built-in components) or a class/function (for composite ' + |
| 349 | 'components) but got: null.' + |
| 350 | (process.env.BABEL_ENV === 'development' |
| 351 | ? '\n\nCheck your code at **.' |
| 352 | : ''), |
| 353 | {withoutStack: true} |
| 354 | ); |
| 355 | expect(() => void (<True />)).toErrorDev( |
| 356 | 'Warning: React.jsx: type is invalid -- expected a string ' + |
| 357 | '(for built-in components) or a class/function (for composite ' + |
| 358 | 'components) but got: boolean.' + |
| 359 | (process.env.BABEL_ENV === 'development' |
| 360 | ? '\n\nCheck your code at **.' |
| 361 | : ''), |
| 362 | {withoutStack: true} |
| 363 | ); |
| 364 | // No error expected |
| 365 | void (<Div />); |
| 366 | }); |
| 367 | |
| 368 | it('should check default prop values', () => { |
| 369 | RequiredPropComponent.defaultProps = {prop: null}; |
| 370 | |
| 371 | expect(() => |
| 372 | ReactTestUtils.renderIntoDocument(<RequiredPropComponent />) |
| 373 | ).toErrorDev( |
| 374 | 'Warning: Failed prop type: Required prop `prop` was not specified in ' + |
| 375 | '`RequiredPropComponent`.', |
| 376 | {withoutStack: true} |
| 377 | ); |
| 378 | }); |
| 379 | |
| 380 | it('should warn on invalid prop types', () => { |
| 381 | // Since there is no prevalidation step for ES6 classes, there is no hook |
| 382 | // for us to issue a warning earlier than element creation when the error |
| 383 | // actually occurs. Since this step is skipped in production, we should just |
| 384 | // warn instead of throwing for this case. |
| 385 | class NullPropTypeComponent extends React.Component { |
| 386 | render() { |
| 387 | return <span>{this.props.prop}</span>; |
| 388 | } |
| 389 | } |
| 390 | NullPropTypeComponent.propTypes = { |
| 391 | prop: null, |
| 392 | }; |
| 393 | expect(() => |
| 394 | ReactTestUtils.renderIntoDocument(<NullPropTypeComponent />) |
| 395 | ).toErrorDev( |
| 396 | 'NullPropTypeComponent: prop type `prop` is invalid; it must be a ' + |
| 397 | 'function, usually from the `prop-types` package,', |
| 398 | {withoutStack: true} |
| 399 | ); |
| 400 | }); |
| 401 | |
| 402 | xit('should warn on invalid context types', () => { |
| 403 | class NullContextTypeComponent extends React.Component { |
| 404 | render() { |
| 405 | return <span>{this.props.prop}</span>; |
| 406 | } |
| 407 | } |
| 408 | NullContextTypeComponent.contextTypes = { |
| 409 | prop: null, |
| 410 | }; |
| 411 | expect(() => |
| 412 | ReactTestUtils.renderIntoDocument(<NullContextTypeComponent />) |
| 413 | ).toErrorDev( |
| 414 | 'NullContextTypeComponent: type `prop` is invalid; it must ' + |
| 415 | 'be a function, usually from the `prop-types` package,' |
| 416 | ); |
| 417 | }); |
| 418 | |
| 419 | it('should warn if getDefaultProps is specified on the class', () => { |
| 420 | class GetDefaultPropsComponent extends React.Component { |
| 421 | render() { |
| 422 | return <span>{this.props.prop}</span>; |
| 423 | } |
| 424 | } |
| 425 | GetDefaultPropsComponent.getDefaultProps = () => ({ |
| 426 | prop: 'foo', |
| 427 | }); |
| 428 | expect(() => |
| 429 | ReactTestUtils.renderIntoDocument(<GetDefaultPropsComponent />) |
| 430 | ).toErrorDev( |
| 431 | 'getDefaultProps is only used on classic React.createClass definitions.' + |
| 432 | ' Use a static property named `defaultProps` instead.', |
| 433 | {withoutStack: true} |
| 434 | ); |
| 435 | }); |
| 436 | |
| 437 | it('should warn if component declares PropTypes instead of propTypes', () => { |
| 438 | class MisspelledPropTypesComponent extends React.Component { |
| 439 | render() { |
| 440 | return <span>{this.props.prop}</span>; |
| 441 | } |
| 442 | } |
| 443 | MisspelledPropTypesComponent.PropTypes = { |
| 444 | prop: PropTypes.string, |
| 445 | }; |
| 446 | expect(() => |
| 447 | ReactTestUtils.renderIntoDocument( |
| 448 | <MisspelledPropTypesComponent prop="hi" /> |
| 449 | ) |
| 450 | ).toErrorDev( |
| 451 | 'Warning: Component MisspelledPropTypesComponent declared `PropTypes` ' + |
| 452 | 'instead of `propTypes`. Did you misspell the property assignment?', |
| 453 | {withoutStack: true} |
| 454 | ); |
| 455 | }); |
| 456 | |
| 457 | // Not supported. |
| 458 | xit('warns for fragments with illegal attributes', () => { |
| 459 | class Foo extends React.Component { |
| 460 | render() { |
| 461 | return <React.Fragment a={1}>hello</React.Fragment>; |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | expect(() => ReactTestUtils.renderIntoDocument(<Foo />)).toErrorDev( |
| 466 | 'Invalid prop `a` supplied to `React.Fragment`. React.Fragment ' + |
| 467 | 'can only have `key` and `children` props.' |
| 468 | ); |
| 469 | }); |
| 470 | |
| 471 | // Not supported. |
| 472 | xit('warns for fragments with refs', () => { |
| 473 | class Foo extends React.Component { |
| 474 | render() { |
| 475 | return ( |
| 476 | <React.Fragment |
| 477 | ref={bar => { |
| 478 | this.foo = bar; |
| 479 | }}> |
| 480 | hello |
| 481 | </React.Fragment> |
| 482 | ); |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | expect(() => ReactTestUtils.renderIntoDocument(<Foo />)).toErrorDev( |
| 487 | 'Invalid attribute `ref` supplied to `React.Fragment`.' |
| 488 | ); |
| 489 | }); |
| 490 | |
| 491 | // Not supported. |
| 492 | xit('does not warn for fragments of multiple elements without keys', () => { |
| 493 | ReactTestUtils.renderIntoDocument( |
| 494 | <> |
| 495 | <span>1</span> |
| 496 | <span>2</span> |
| 497 | </> |
| 498 | ); |
| 499 | }); |
| 500 | |
| 501 | // Not supported. |
| 502 | xit('warns for fragments of multiple elements with same key', () => { |
| 503 | expect(() => |
| 504 | ReactTestUtils.renderIntoDocument( |
| 505 | <> |
| 506 | <span key="a">1</span> |
| 507 | <span key="a">2</span> |
| 508 | <span key="b">3</span> |
| 509 | </> |
| 510 | ) |
| 511 | ).toErrorDev('Encountered two children with the same key, `a`.', { |
| 512 | withoutStack: true, |
| 513 | }); |
| 514 | }); |
| 515 | |
| 516 | // Not supported. |
| 517 | xit('does not call lazy initializers eagerly', () => { |
| 518 | let didCall = false; |
| 519 | const Lazy = React.lazy(() => { |
| 520 | didCall = true; |
| 521 | return {then() {}}; |
| 522 | }); |
| 523 | <Lazy />; |
| 524 | expect(didCall).toBe(false); |
| 525 | }); |
| 526 | |
| 527 | it('supports classic refs', () => { |
| 528 | class Foo extends React.Component { |
| 529 | render() { |
| 530 | return <div className="foo" ref="inner" />; |
| 531 | } |
| 532 | } |
| 533 | const container = document.createElement('div'); |
| 534 | const instance = ReactDOM.render(<Foo />, container); |
| 535 | expect(instance.refs.inner.className).toBe('foo'); |
| 536 | }); |
| 537 | |
| 538 | it('should support refs on owned components', () => { |
| 539 | const innerObj = {}; |
| 540 | const outerObj = {}; |
| 541 | |
| 542 | class Wrapper extends React.Component { |
| 543 | getObject = () => { |
| 544 | return this.props.object; |
| 545 | }; |
| 546 | |
| 547 | render() { |
| 548 | return <div>{this.props.children}</div>; |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | class Component extends React.Component { |
| 553 | render() { |
| 554 | const inner = <Wrapper object={innerObj} ref="inner" />; |
| 555 | const outer = ( |
| 556 | <Wrapper object={outerObj} ref="outer"> |
| 557 | {inner} |
| 558 | </Wrapper> |
| 559 | ); |
| 560 | return outer; |
| 561 | } |
| 562 | |
| 563 | componentDidMount() { |
| 564 | expect(this.refs.inner.getObject()).toEqual(innerObj); |
| 565 | expect(this.refs.outer.getObject()).toEqual(outerObj); |
| 566 | } |
| 567 | } |
| 568 | |
| 569 | ReactTestUtils.renderIntoDocument(<Component />); |
| 570 | }); |
| 571 | |
| 572 | it('should support callback-style refs', () => { |
| 573 | const innerObj = {}; |
| 574 | const outerObj = {}; |
| 575 | |
| 576 | class Wrapper extends React.Component { |
| 577 | getObject = () => { |
| 578 | return this.props.object; |
| 579 | }; |
| 580 | |
| 581 | render() { |
| 582 | return <div>{this.props.children}</div>; |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | let mounted = false; |
| 587 | |
| 588 | class Component extends React.Component { |
| 589 | render() { |
| 590 | const inner = ( |
| 591 | <Wrapper object={innerObj} ref={c => (this.innerRef = c)} /> |
| 592 | ); |
| 593 | const outer = ( |
| 594 | <Wrapper object={outerObj} ref={c => (this.outerRef = c)}> |
| 595 | {inner} |
| 596 | </Wrapper> |
| 597 | ); |
| 598 | return outer; |
| 599 | } |
| 600 | |
| 601 | componentDidMount() { |
| 602 | expect(this.innerRef.getObject()).toEqual(innerObj); |
| 603 | expect(this.outerRef.getObject()).toEqual(outerObj); |
| 604 | mounted = true; |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | ReactTestUtils.renderIntoDocument(<Component />); |
| 609 | expect(mounted).toBe(true); |
| 610 | }); |
| 611 | |
| 612 | // Not supported. |
| 613 | xit('should support object-style refs', () => { |
| 614 | const innerObj = {}; |
| 615 | const outerObj = {}; |
| 616 | |
| 617 | class Wrapper extends React.Component { |
| 618 | getObject = () => { |
| 619 | return this.props.object; |
| 620 | }; |
| 621 | |
| 622 | render() { |
| 623 | return <div>{this.props.children}</div>; |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | let mounted = false; |
| 628 | |
| 629 | class Component extends React.Component { |
| 630 | constructor() { |
| 631 | super(); |
| 632 | this.innerRef = React.createRef(); |
| 633 | this.outerRef = React.createRef(); |
| 634 | } |
| 635 | render() { |
| 636 | const inner = <Wrapper object={innerObj} ref={this.innerRef} />; |
| 637 | const outer = ( |
| 638 | <Wrapper object={outerObj} ref={this.outerRef}> |
| 639 | {inner} |
| 640 | </Wrapper> |
| 641 | ); |
| 642 | return outer; |
| 643 | } |
| 644 | |
| 645 | componentDidMount() { |
| 646 | expect(this.innerRef.current.getObject()).toEqual(innerObj); |
| 647 | expect(this.outerRef.current.getObject()).toEqual(outerObj); |
| 648 | mounted = true; |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | ReactTestUtils.renderIntoDocument(<Component />); |
| 653 | expect(mounted).toBe(true); |
| 654 | }); |
| 655 | |
| 656 | it('should support new-style refs with mixed-up owners', () => { |
| 657 | class Wrapper extends React.Component { |
| 658 | getTitle = () => { |
| 659 | return this.props.title; |
| 660 | }; |
| 661 | |
| 662 | render() { |
| 663 | return this.props.getContent(); |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | let mounted = false; |
| 668 | |
| 669 | class Component extends React.Component { |
| 670 | getInner = () => { |
| 671 | // (With old-style refs, it's impossible to get a ref to this div |
| 672 | // because Wrapper is the current owner when this function is called.) |
| 673 | return <div className="inner" ref={c => (this.innerRef = c)} />; |
| 674 | }; |
| 675 | |
| 676 | render() { |
| 677 | return ( |
| 678 | <Wrapper |
| 679 | title="wrapper" |
| 680 | ref={c => (this.wrapperRef = c)} |
| 681 | getContent={this.getInner} |
| 682 | /> |
| 683 | ); |
| 684 | } |
| 685 | |
| 686 | componentDidMount() { |
| 687 | // Check .props.title to make sure we got the right elements back |
| 688 | expect(this.wrapperRef.getTitle()).toBe('wrapper'); |
| 689 | expect(this.innerRef.className).toBe('inner'); |
| 690 | mounted = true; |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | ReactTestUtils.renderIntoDocument(<Component />); |
| 695 | expect(mounted).toBe(true); |
| 696 | }); |
| 697 | |
| 698 | it('should warn when `key` is being accessed on composite element', () => { |
| 699 | const container = document.createElement('div'); |
| 700 | class Child extends React.Component { |
| 701 | render() { |
| 702 | return <div> {this.props.key} </div>; |
| 703 | } |
| 704 | } |
| 705 | class Parent extends React.Component { |
| 706 | render() { |
| 707 | return ( |
| 708 | <div> |
| 709 | <Child key="0" /> |
| 710 | <Child key="1" /> |
| 711 | <Child key="2" /> |
| 712 | </div> |
| 713 | ); |
| 714 | } |
| 715 | } |
| 716 | expect(() => ReactDOM.render(<Parent />, container)).toErrorDev( |
| 717 | 'Child: `key` is not a prop. Trying to access it will result ' + |
| 718 | 'in `undefined` being returned. If you need to access the same ' + |
| 719 | 'value within the child component, you should pass it as a different ' + |
| 720 | 'prop. (https://reactjs.org/link/special-props)', |
| 721 | {withoutStack: true} |
| 722 | ); |
| 723 | }); |
| 724 | |
| 725 | it('should warn when `ref` is being accessed', () => { |
| 726 | const container = document.createElement('div'); |
| 727 | class Child extends React.Component { |
| 728 | render() { |
| 729 | return <div> {this.props.ref} </div>; |
| 730 | } |
| 731 | } |
| 732 | class Parent extends React.Component { |
| 733 | render() { |
| 734 | return ( |
| 735 | <div> |
| 736 | <Child ref="childElement" /> |
| 737 | </div> |
| 738 | ); |
| 739 | } |
| 740 | } |
| 741 | expect(() => ReactDOM.render(<Parent />, container)).toErrorDev( |
| 742 | 'Child: `ref` is not a prop. Trying to access it will result ' + |
| 743 | 'in `undefined` being returned. If you need to access the same ' + |
| 744 | 'value within the child component, you should pass it as a different ' + |
| 745 | 'prop. (https://reactjs.org/link/special-props)', |
| 746 | {withoutStack: true} |
| 747 | ); |
| 748 | }); |
| 749 | |
| 750 | // Note: no warning before 16. |
| 751 | it('should NOT warn when owner and self are different for string refs', () => { |
| 752 | class ClassWithRenderProp extends React.Component { |
| 753 | render() { |
| 754 | return this.props.children(); |
| 755 | } |
| 756 | } |
| 757 | |
| 758 | class ClassParent extends React.Component { |
| 759 | render() { |
| 760 | return ( |
| 761 | <ClassWithRenderProp>{() => <div ref="myRef" />}</ClassWithRenderProp> |
| 762 | ); |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | const container = document.createElement('div'); |
| 767 | ReactDOM.render(<ClassParent />, container); |
| 768 | }); |