| 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 | 'use strict'; |
| 11 | |
| 12 | describe('ReactDOMComponentTree', () => { |
| 13 | let React; |
| 14 | let ReactDOM; |
| 15 | let container; |
| 16 | let assertConsoleErrorDev; |
| 17 | |
| 18 | beforeEach(() => { |
| 19 | React = require('react'); |
| 20 | ReactDOM = require('react-dom'); |
| 21 | assertConsoleErrorDev = |
| 22 | require('internal-test-utils').assertConsoleErrorDev; |
| 23 | |
| 24 | container = document.createElement('div'); |
| 25 | document.body.appendChild(container); |
| 26 | }); |
| 27 | |
| 28 | afterEach(() => { |
| 29 | document.body.removeChild(container); |
| 30 | container = null; |
| 31 | }); |
| 32 | |
| 33 | // @gate !disableLegacyMode |
| 34 | it('finds instance of node that is attempted to be unmounted', () => { |
| 35 | const component = <div />; |
| 36 | const node = ReactDOM.render(<div>{component}</div>, container); |
| 37 | ReactDOM.unmountComponentAtNode(node); |
| 38 | assertConsoleErrorDev([ |
| 39 | "unmountComponentAtNode(): The node you're attempting to unmount " + |
| 40 | 'was rendered by React and is not a top-level container. You may ' + |
| 41 | 'have accidentally passed in a React root node instead of its ' + |
| 42 | 'container.', |
| 43 | ]); |
| 44 | }); |
| 45 | |
| 46 | // @gate !disableLegacyMode |
| 47 | it('finds instance from node to stop rendering over other react rendered components', () => { |
| 48 | const component = ( |
| 49 | <div> |
| 50 | <span>Hello</span> |
| 51 | </div> |
| 52 | ); |
| 53 | const anotherComponent = <div />; |
| 54 | const instance = ReactDOM.render(component, container); |
| 55 | ReactDOM.render(anotherComponent, instance); |
| 56 | assertConsoleErrorDev([ |
| 57 | 'Replacing React-rendered children with a new root ' + |
| 58 | 'component. If you intended to update the children of this node, ' + |
| 59 | 'you should instead have the existing children update their state ' + |
| 60 | 'and render the new components instead of calling ReactDOM.render.', |
| 61 | ]); |
| 62 | }); |
| 63 | }); |