forked from reactjs/react-transition-group
/
CSSTransitionGroup-test.js
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CSSTransitionGroup-test.js
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import hasClass from 'dom-helpers/class/hasClass';
let React;
let ReactDOM;
let CSSTransitionGroup;
// Most of the real functionality is covered in other unit tests, this just
// makes sure we're wired up correctly.
describe('CSSTransitionGroup', () => {
let container;
beforeEach(() => {
jest.resetModuleRegistry();
React = require('react');
ReactDOM = require('react-dom');
CSSTransitionGroup = require('../src/CSSTransitionGroup');
container = document.createElement('div');
spyOn(console, 'error');
});
it('should warn if timeouts aren\'t specified', () => {
ReactDOM.render(
<CSSTransitionGroup
transitionName="yolo"
transitionEnter={false}
transitionLeave={true}
>
<span key="one" id="one" />
</CSSTransitionGroup>,
container,
);
// Warning about the missing transitionLeaveTimeout prop
expect(console.error.calls.count()).toBe(1);
});
it('should not warn if timeouts is zero', () => {
ReactDOM.render(
<CSSTransitionGroup
transitionName="yolo"
transitionEnter={false}
transitionLeave={true}
transitionLeaveTimeout={0}
>
<span key="one" id="one" />
</CSSTransitionGroup>,
container,
);
expect(console.error.calls.count()).toBe(0);
});
it('should clean-up silently after the timeout elapses', () => {
let a = ReactDOM.render(
<CSSTransitionGroup
transitionName="yolo"
transitionEnter={false}
transitionLeaveTimeout={200}
>
<span key="one" id="one" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(1);
setTimeout.mock.calls.length = 0;
ReactDOM.render(
<CSSTransitionGroup
transitionName="yolo"
transitionEnter={false}
transitionLeaveTimeout={200}
>
<span key="two" id="two" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(2);
expect(ReactDOM.findDOMNode(a).childNodes[0].id).toBe('two');
expect(ReactDOM.findDOMNode(a).childNodes[1].id).toBe('one');
// For some reason jst is adding extra setTimeout()s and grunt test isn't,
// so we need to do this disgusting hack.
for (let i = 0; i < setTimeout.mock.calls.length; i++) {
if (setTimeout.mock.calls[i][1] === 200) {
setTimeout.mock.calls[i][0]();
break;
}
}
// No warnings
expect(console.error.calls.count()).toBe(0);
// The leaving child has been removed
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(1);
expect(ReactDOM.findDOMNode(a).childNodes[0].id).toBe('two');
});
it('should keep both sets of DOM nodes around', () => {
let a = ReactDOM.render(
<CSSTransitionGroup transitionName="yolo">
<span key="one" id="one" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(1);
ReactDOM.render(
<CSSTransitionGroup transitionName="yolo">
<span key="two" id="two" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(2);
expect(ReactDOM.findDOMNode(a).childNodes[0].id).toBe('two');
expect(ReactDOM.findDOMNode(a).childNodes[1].id).toBe('one');
});
it('should switch transitionLeave from false to true', () => {
let a = ReactDOM.render(
<CSSTransitionGroup
transitionName="yolo"
transitionEnter={false}
transitionLeave={false}
>
<span key="one" id="one" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(1);
ReactDOM.render(
<CSSTransitionGroup
transitionName="yolo"
transitionEnter={false}
transitionLeave={false}
>
<span key="two" id="two" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(1);
ReactDOM.render(
<CSSTransitionGroup
transitionName="yolo"
transitionEnter={false}
transitionLeave={true}
>
<span key="three" id="three" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(2);
expect(ReactDOM.findDOMNode(a).childNodes[0].id).toBe('three');
expect(ReactDOM.findDOMNode(a).childNodes[1].id).toBe('two');
});
it('should work with no children', () => {
ReactDOM.render(
<CSSTransitionGroup transitionName="yolo" />,
container,
);
});
it('should work with a null child', () => {
ReactDOM.render(
<CSSTransitionGroup transitionName="yolo">
{[null]}
</CSSTransitionGroup>,
container,
);
});
it('should transition from one to null', () => {
let a = ReactDOM.render(
<CSSTransitionGroup transitionName="yolo">
<span key="one" id="one" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(1);
ReactDOM.render(
<CSSTransitionGroup transitionName="yolo">
{null}
</CSSTransitionGroup>,
container,
);
// (Here, we expect the original child to stick around but test that no
// exception is thrown)
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(1);
expect(ReactDOM.findDOMNode(a).childNodes[0].id).toBe('one');
});
it('should transition from false to one', () => {
let a = ReactDOM.render(
<CSSTransitionGroup transitionName="yolo">
{false}
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(0);
ReactDOM.render(
<CSSTransitionGroup transitionName="yolo">
<span key="one" id="one" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(1);
expect(ReactDOM.findDOMNode(a).childNodes[0].id).toBe('one');
});
it('should use transition-type specific names when they\'re provided', () => {
let customTransitionNames = {
enter: 'custom-entering',
leave: 'custom-leaving',
};
let a = ReactDOM.render(
<CSSTransitionGroup
transitionName={customTransitionNames}
transitionEnterTimeout={1}
transitionLeaveTimeout={1}
>
<span key="one" id="one" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(1);
// Add an element
ReactDOM.render(
<CSSTransitionGroup
transitionName={customTransitionNames}
transitionEnterTimeout={1}
transitionLeaveTimeout={1}
>
<span key="one" id="one" />
<span key="two" id="two" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(2);
let enteringNode = ReactDOM.findDOMNode(a).childNodes[1];
expect(hasClass(enteringNode, 'custom-entering')).toBe(true);
// Remove an element
ReactDOM.render(
<CSSTransitionGroup
transitionName={customTransitionNames}
transitionEnterTimeout={1}
transitionLeaveTimeout={1}
>
<span key="two" id="two" />
</CSSTransitionGroup>,
container,
);
expect(ReactDOM.findDOMNode(a).childNodes.length).toBe(2);
let leavingNode = ReactDOM.findDOMNode(a).childNodes[0];
expect(hasClass(leavingNode, 'custom-leaving')).toBe(true);
});
it('should clear transition timeouts when unmounted', () => {
class Component extends React.Component {
render() {
return (
<CSSTransitionGroup
transitionName="yolo"
transitionEnterTimeout={500}
>
{this.props.children}
</CSSTransitionGroup>
);
}
}
ReactDOM.render(<Component />, container);
ReactDOM.render(<Component><span key="yolo" id="yolo" /></Component>, container);
ReactDOM.unmountComponentAtNode(container);
// Testing that no exception is thrown here, as the timeout has been cleared.
jest.runAllTimers();
});
it('should handle unmounted elements properly', () => {
class Child extends React.Component {
render() {
if (!this.props.show) {
return null;
}
return <div />;
}
}
class Component extends React.Component {
state = { showChild: true };
componentDidMount() {
this.setState({ showChild: false });
}
render() {
return (
<CSSTransitionGroup
transitionName="yolo"
transitionAppear={true}
transitionAppearTimeout={0}
>
<Child show={this.state.showChild} />
</CSSTransitionGroup>
);
}
}
ReactDOM.render(<Component />, container);
// Testing that no exception is thrown here, as the timeout has been cleared.
jest.runAllTimers();
});
it('should work with custom component wrapper cloning children', () => {
const extraClassNameProp = 'wrapper-item';
class Wrapper extends React.Component {
render() {
return (
<div>
{
React.Children.map(this.props.children,
child => React.cloneElement(child, { className: extraClassNameProp }))
}
</div>
);
}
}
class Child extends React.Component {
render() {
return <div {...this.props} />;
}
}
class Component extends React.Component {
render() {
return (
<CSSTransitionGroup
transitionName="yolo"
component={Wrapper}
>
<Child />
</CSSTransitionGroup>
);
}
}
const a = ReactDOM.render(<Component />, container);
const child = ReactDOM.findDOMNode(a).childNodes[0];
expect(hasClass(child, extraClassNameProp)).toBe(true);
// Testing that no exception is thrown here, as the timeout has been cleared.
jest.runAllTimers();
});
});