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renderSubtreeIntoContainer-test.js
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renderSubtreeIntoContainer-test.js
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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @emails react-core
*/
'use strict';
const React = require('react');
const PropTypes = require('prop-types');
const ReactDOM = require('react-dom');
const ReactTestUtils = require('react-dom/test-utils');
const renderSubtreeIntoContainer = require('react-dom')
.unstable_renderSubtreeIntoContainer;
const ReactFeatureFlags = require('shared/ReactFeatureFlags');
// Once this flag is always true, we should delete this test file
if (ReactFeatureFlags.disableUnstableRenderSubtreeIntoContainer) {
describe('renderSubtreeIntoContainer', () => {
it('empty test', () => {
// Empty test to prevent "Your test suite must contain at least one test." error.
});
});
} else {
describe('renderSubtreeIntoContainer', () => {
it('should pass context when rendering subtree elsewhere', () => {
const portal = document.createElement('div');
class Component extends React.Component {
static contextTypes = {
foo: PropTypes.string.isRequired,
};
render() {
return <div>{this.context.foo}</div>;
}
}
class Parent extends React.Component {
static childContextTypes = {
foo: PropTypes.string.isRequired,
};
getChildContext() {
return {
foo: 'bar',
};
}
render() {
return null;
}
componentDidMount() {
if (ReactFeatureFlags.warnUnstableRenderSubtreeIntoContainer) {
expect(
function() {
renderSubtreeIntoContainer(this, <Component />, portal);
}.bind(this),
).toWarnDev(
'ReactDOM.unstable_renderSubtreeIntoContainer() is deprecated and ' +
'will be removed in a future major release. Consider using React Portals instead.',
);
} else {
renderSubtreeIntoContainer(this, <Component />, portal);
}
}
}
ReactTestUtils.renderIntoDocument(<Parent />);
expect(portal.firstChild.innerHTML).toBe('bar');
});
it('should throw if parentComponent is invalid', () => {
const portal = document.createElement('div');
class Component extends React.Component {
static contextTypes = {
foo: PropTypes.string.isRequired,
};
render() {
return <div>{this.context.foo}</div>;
}
}
// ESLint is confused here and thinks Parent is unused, presumably because
// it is only used inside of the class body?
// eslint-disable-next-line no-unused-vars
class Parent extends React.Component {
static childContextTypes = {
foo: PropTypes.string.isRequired,
};
getChildContext() {
return {
foo: 'bar',
};
}
render() {
return null;
}
componentDidMount() {
expect(function() {
renderSubtreeIntoContainer(<Parent />, <Component />, portal);
}).toThrowError('parentComponentmust be a valid React Component');
}
}
});
it('should update context if it changes due to setState', () => {
const container = document.createElement('div');
document.body.appendChild(container);
const portal = document.createElement('div');
class Component extends React.Component {
static contextTypes = {
foo: PropTypes.string.isRequired,
getFoo: PropTypes.func.isRequired,
};
render() {
return <div>{this.context.foo + '-' + this.context.getFoo()}</div>;
}
}
class Parent extends React.Component {
static childContextTypes = {
foo: PropTypes.string.isRequired,
getFoo: PropTypes.func.isRequired,
};
state = {
bar: 'initial',
};
getChildContext() {
return {
foo: this.state.bar,
getFoo: () => this.state.bar,
};
}
render() {
return null;
}
componentDidMount() {
renderSubtreeIntoContainer(this, <Component />, portal);
}
componentDidUpdate() {
renderSubtreeIntoContainer(this, <Component />, portal);
}
}
const instance = ReactDOM.render(<Parent />, container);
expect(portal.firstChild.innerHTML).toBe('initial-initial');
instance.setState({bar: 'changed'});
expect(portal.firstChild.innerHTML).toBe('changed-changed');
});
it('should update context if it changes due to re-render', () => {
const container = document.createElement('div');
document.body.appendChild(container);
const portal = document.createElement('div');
class Component extends React.Component {
static contextTypes = {
foo: PropTypes.string.isRequired,
getFoo: PropTypes.func.isRequired,
};
render() {
return <div>{this.context.foo + '-' + this.context.getFoo()}</div>;
}
}
class Parent extends React.Component {
static childContextTypes = {
foo: PropTypes.string.isRequired,
getFoo: PropTypes.func.isRequired,
};
getChildContext() {
return {
foo: this.props.bar,
getFoo: () => this.props.bar,
};
}
render() {
return null;
}
componentDidMount() {
renderSubtreeIntoContainer(this, <Component />, portal);
}
componentDidUpdate() {
renderSubtreeIntoContainer(this, <Component />, portal);
}
}
ReactDOM.render(<Parent bar="initial" />, container);
expect(portal.firstChild.innerHTML).toBe('initial-initial');
ReactDOM.render(<Parent bar="changed" />, container);
expect(portal.firstChild.innerHTML).toBe('changed-changed');
});
it('should render portal with non-context-provider parent', () => {
const container = document.createElement('div');
document.body.appendChild(container);
const portal = document.createElement('div');
class Parent extends React.Component {
render() {
return null;
}
componentDidMount() {
renderSubtreeIntoContainer(this, <div>hello</div>, portal);
}
}
ReactDOM.render(<Parent bar="initial" />, container);
expect(portal.firstChild.innerHTML).toBe('hello');
});
it('should get context through non-context-provider parent', () => {
const container = document.createElement('div');
document.body.appendChild(container);
const portal = document.createElement('div');
class Parent extends React.Component {
render() {
return <Middle />;
}
getChildContext() {
return {value: this.props.value};
}
static childContextTypes = {
value: PropTypes.string.isRequired,
};
}
class Middle extends React.Component {
render() {
return null;
}
componentDidMount() {
renderSubtreeIntoContainer(this, <Child />, portal);
}
}
class Child extends React.Component {
static contextTypes = {
value: PropTypes.string.isRequired,
};
render() {
return <div>{this.context.value}</div>;
}
}
ReactDOM.render(<Parent value="foo" />, container);
expect(portal.textContent).toBe('foo');
});
it('should get context through middle non-context-provider layer', () => {
const container = document.createElement('div');
document.body.appendChild(container);
const portal1 = document.createElement('div');
const portal2 = document.createElement('div');
class Parent extends React.Component {
render() {
return null;
}
getChildContext() {
return {value: this.props.value};
}
componentDidMount() {
renderSubtreeIntoContainer(this, <Middle />, portal1);
}
static childContextTypes = {
value: PropTypes.string.isRequired,
};
}
class Middle extends React.Component {
render() {
return null;
}
componentDidMount() {
renderSubtreeIntoContainer(this, <Child />, portal2);
}
}
class Child extends React.Component {
static contextTypes = {
value: PropTypes.string.isRequired,
};
render() {
return <div>{this.context.value}</div>;
}
}
ReactDOM.render(<Parent value="foo" />, container);
expect(portal2.textContent).toBe('foo');
});
it('fails gracefully when mixing React 15 and 16', () => {
class C extends React.Component {
render() {
return <div />;
}
}
const c = ReactDOM.render(<C />, document.createElement('div'));
// React 15 calls this:
// https://github.com/facebook/react/blob/77b71fc3c4/src/renderers/dom/client/ReactMount.js#L478-L479
expect(() => {
c._reactInternalInstance._processChildContext({});
}).toThrow(
__DEV__
? '_processChildContext is not available in React 16+. This likely ' +
'means you have multiple copies of React and are attempting to nest ' +
'a React 15 tree inside a React 16 tree using ' +
"unstable_renderSubtreeIntoContainer, which isn't supported. Try to " +
'make sure you have only one copy of React (and ideally, switch to ' +
'ReactDOM.createPortal).'
: "Cannot read property '_processChildContext' of undefined",
);
});
});
}