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ReactCreateClass-test.js
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ReactCreateClass-test.js
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/**
* Copyright 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @emails react-core
*/
'use strict';
var PropTypes;
var React;
var ReactDOM;
var ReactTestUtils;
var createReactClass;
describe('ReactClass-spec', () => {
beforeEach(() => {
PropTypes = require('prop-types');
React = require('React');
ReactDOM = require('ReactDOM');
ReactTestUtils = require('ReactTestUtils');
var createReactClassFactory = require('create-react-class/factory');
createReactClass = createReactClassFactory(
React.Component,
React.isValidElement,
require('ReactNoopUpdateQueue'),
);
});
it('should throw when `render` is not specified', () => {
expect(function() {
createReactClass({});
}).toThrowError(
'createClass(...): Class specification must implement a `render` method.',
);
});
// TODO: Update babel-plugin-transform-react-display-name
xit('should copy `displayName` onto the Constructor', () => {
var TestComponent = createReactClass({
render: function() {
return <div />;
},
});
expect(TestComponent.displayName).toBe('TestComponent');
});
it('should copy prop types onto the Constructor', () => {
var propValidator = jest.fn();
var TestComponent = createReactClass({
propTypes: {
value: propValidator,
},
render: function() {
return <div />;
},
});
expect(TestComponent.propTypes).toBeDefined();
expect(TestComponent.propTypes.value).toBe(propValidator);
});
it('should warn on invalid prop types', () => {
spyOn(console, 'error');
createReactClass({
displayName: 'Component',
propTypes: {
prop: null,
},
render: function() {
return <span>{this.props.prop}</span>;
},
});
expect(console.error.calls.count()).toBe(1);
expect(console.error.calls.argsFor(0)[0]).toBe(
'Warning: Component: prop type `prop` is invalid; ' +
'it must be a function, usually from React.PropTypes.',
);
});
it('should warn on invalid context types', () => {
spyOn(console, 'error');
createReactClass({
displayName: 'Component',
contextTypes: {
prop: null,
},
render: function() {
return <span>{this.props.prop}</span>;
},
});
expect(console.error.calls.count()).toBe(1);
expect(console.error.calls.argsFor(0)[0]).toBe(
'Warning: Component: context type `prop` is invalid; ' +
'it must be a function, usually from React.PropTypes.',
);
});
it('should throw on invalid child context types', () => {
spyOn(console, 'error');
createReactClass({
displayName: 'Component',
childContextTypes: {
prop: null,
},
render: function() {
return <span>{this.props.prop}</span>;
},
});
expect(console.error.calls.count()).toBe(1);
expect(console.error.calls.argsFor(0)[0]).toBe(
'Warning: Component: child context type `prop` is invalid; ' +
'it must be a function, usually from React.PropTypes.',
);
});
it('should warn when mispelling shouldComponentUpdate', () => {
spyOn(console, 'error');
createReactClass({
componentShouldUpdate: function() {
return false;
},
render: function() {
return <div />;
},
});
expect(console.error.calls.count()).toBe(1);
expect(console.error.calls.argsFor(0)[0]).toBe(
'Warning: A component has a method called componentShouldUpdate(). Did you ' +
'mean shouldComponentUpdate()? The name is phrased as a question ' +
'because the function is expected to return a value.',
);
createReactClass({
displayName: 'NamedComponent',
componentShouldUpdate: function() {
return false;
},
render: function() {
return <div />;
},
});
expect(console.error.calls.count()).toBe(2);
expect(console.error.calls.argsFor(1)[0]).toBe(
'Warning: NamedComponent has a method called componentShouldUpdate(). Did you ' +
'mean shouldComponentUpdate()? The name is phrased as a question ' +
'because the function is expected to return a value.',
);
});
it('should warn when mispelling componentWillReceiveProps', () => {
spyOn(console, 'error');
createReactClass({
componentWillRecieveProps: function() {
return false;
},
render: function() {
return <div />;
},
});
expect(console.error.calls.count()).toBe(1);
expect(console.error.calls.argsFor(0)[0]).toBe(
'Warning: A component has a method called componentWillRecieveProps(). Did you ' +
'mean componentWillReceiveProps()?',
);
});
it('should throw if a reserved property is in statics', () => {
expect(function() {
createReactClass({
statics: {
getDefaultProps: function() {
return {
foo: 0,
};
},
},
render: function() {
return <span />;
},
});
}).toThrowError(
'ReactClass: You are attempting to define a reserved property, ' +
'`getDefaultProps`, that shouldn\'t be on the "statics" key. Define ' +
'it as an instance property instead; it will still be accessible on ' +
'the constructor.',
);
});
// TODO: Consider actually moving these to statics or drop this unit test.
xit('should warn when using deprecated non-static spec keys', () => {
spyOn(console, 'error');
createReactClass({
mixins: [{}],
propTypes: {
foo: PropTypes.string,
},
contextTypes: {
foo: PropTypes.string,
},
childContextTypes: {
foo: PropTypes.string,
},
render: function() {
return <div />;
},
});
expect(console.error.calls.count()).toBe(4);
expect(console.error.calls.argsFor(0)[0]).toBe(
'createClass(...): `mixins` is now a static property and should ' +
'be defined inside "statics".',
);
expect(console.error.calls.argsFor(1)[0]).toBe(
'createClass(...): `propTypes` is now a static property and should ' +
'be defined inside "statics".',
);
expect(console.error.calls.argsFor(2)[0]).toBe(
'createClass(...): `contextTypes` is now a static property and ' +
'should be defined inside "statics".',
);
expect(console.error.calls.argsFor(3)[0]).toBe(
'createClass(...): `childContextTypes` is now a static property and ' +
'should be defined inside "statics".',
);
});
it('should support statics', () => {
var Component = createReactClass({
statics: {
abc: 'def',
def: 0,
ghi: null,
jkl: 'mno',
pqr: function() {
return this;
},
},
render: function() {
return <span />;
},
});
var instance = <Component />;
instance = ReactTestUtils.renderIntoDocument(instance);
expect(instance.constructor.abc).toBe('def');
expect(Component.abc).toBe('def');
expect(instance.constructor.def).toBe(0);
expect(Component.def).toBe(0);
expect(instance.constructor.ghi).toBe(null);
expect(Component.ghi).toBe(null);
expect(instance.constructor.jkl).toBe('mno');
expect(Component.jkl).toBe('mno');
expect(instance.constructor.pqr()).toBe(Component);
expect(Component.pqr()).toBe(Component);
});
it('should work with object getInitialState() return values', () => {
var Component = createReactClass({
getInitialState: function() {
return {
occupation: 'clown',
};
},
render: function() {
return <span />;
},
});
var instance = <Component />;
instance = ReactTestUtils.renderIntoDocument(instance);
expect(instance.state.occupation).toEqual('clown');
});
it('renders based on context getInitialState', () => {
var Foo = createReactClass({
contextTypes: {
className: PropTypes.string,
},
getInitialState() {
return {className: this.context.className};
},
render() {
return <span className={this.state.className} />;
},
});
var Outer = createReactClass({
childContextTypes: {
className: PropTypes.string,
},
getChildContext() {
return {className: 'foo'};
},
render() {
return <Foo />;
},
});
var container = document.createElement('div');
ReactDOM.render(<Outer />, container);
expect(container.firstChild.className).toBe('foo');
});
it('should throw with non-object getInitialState() return values', () => {
[['an array'], 'a string', 1234].forEach(function(state) {
var Component = createReactClass({
getInitialState: function() {
return state;
},
render: function() {
return <span />;
},
});
var instance = <Component />;
expect(function() {
instance = ReactTestUtils.renderIntoDocument(instance);
}).toThrowError(
'Component.getInitialState(): must return an object or null',
);
});
});
it('should work with a null getInitialState() return value', () => {
var Component = createReactClass({
getInitialState: function() {
return null;
},
render: function() {
return <span />;
},
});
expect(() =>
ReactTestUtils.renderIntoDocument(<Component />),
).not.toThrow();
});
it('should throw when using legacy factories', () => {
spyOn(console, 'error');
var Component = createReactClass({
render() {
return <div />;
},
});
expect(() => Component()).toThrow();
expect(console.error.calls.count()).toBe(1);
expect(console.error.calls.argsFor(0)[0]).toBe(
'Warning: Something is calling a React component directly. Use a ' +
'factory or JSX instead. See: https://fb.me/react-legacyfactory',
);
});
it('replaceState and callback works', () => {
var ops = [];
var Component = createReactClass({
getInitialState() {
return {step: 0};
},
render() {
ops.push('Render: ' + this.state.step);
return <div />;
},
});
var instance = ReactTestUtils.renderIntoDocument(<Component />);
instance.replaceState({step: 1}, () => {
ops.push('Callback: ' + instance.state.step);
});
expect(ops).toEqual(['Render: 0', 'Render: 1', 'Callback: 1']);
});
it('isMounted works', () => {
spyOn(console, 'error');
var ops = [];
var instance;
var Component = createReactClass({
displayName: 'MyComponent',
log(name) {
ops.push(`${name}: ${this.isMounted()}`);
},
getInitialState() {
this.log('getInitialState');
return {};
},
componentWillMount() {
this.log('componentWillMount');
},
componentDidMount() {
this.log('componentDidMount');
},
componentWillUpdate() {
this.log('componentWillUpdate');
},
componentDidUpdate() {
this.log('componentDidUpdate');
},
componentWillUnmount() {
this.log('componentWillUnmount');
},
render() {
instance = this;
this.log('render');
return <div />;
},
});
var container = document.createElement('div');
ReactDOM.render(<Component />, container);
ReactDOM.render(<Component />, container);
ReactDOM.unmountComponentAtNode(container);
instance.log('after unmount');
expect(ops).toEqual([
'getInitialState: false',
'componentWillMount: false',
'render: false',
'componentDidMount: true',
'componentWillUpdate: true',
'render: true',
'componentDidUpdate: true',
'componentWillUnmount: false',
'after unmount: false',
]);
expect(console.error.calls.count()).toBe(1);
expect(console.error.calls.argsFor(0)[0]).toEqual(
'Warning: MyComponent: isMounted is deprecated. Instead, make sure to ' +
'clean up subscriptions and pending requests in componentWillUnmount ' +
'to prevent memory leaks.',
);
});
});