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react-dom.integration.spec.js
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react-dom.integration.spec.js
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/* eslint-env browser */
/* eslint-disable no-lone-blocks, global-require, prefer-template, import/no-unresolved */
import 'babel-polyfill';
import React, { Suspense } from 'react';
import ReactDom from 'react-dom';
// import TestRenderer from 'react-test-renderer';
import ReactHotLoader, { setConfig } from '../../src/index.dev';
import { configureGeneration, incrementHotGeneration } from '../../src/global/generation';
import configuration from '../../src/configuration';
import { AppContainer } from '../../index';
jest.mock('react-dom', () => require('./react-dom'));
describe(`🔥-dom`, () => {
beforeEach(() => {
ReactHotLoader.reset();
setConfig({
ignoreSFC: true,
});
configureGeneration(1, 1);
});
const tick = () => new Promise(resolve => setTimeout(resolve, 10));
if (React.useContext && String(() => 42).indexOf('=>') > 0) {
it('shall integrate with React', () => {
expect(ReactHotLoader.IS_REACT_MERGE_ENABLED).toBe(true);
expect(configuration.intergratedResolver).toBe(true);
expect(React.useEffect.isPatchedByReactHotLoader).toBe(true);
});
it('should use component comparator', async () => {
const mount = jest.fn();
const unmount = jest.fn();
const Fun1 = () => {
React.useEffect(() => {
mount('test1');
return unmount;
}, []);
return 'fun1';
};
const el = document.createElement('div');
ReactDom.render(<Fun1 />, el);
expect(el.innerHTML).toEqual('fun1');
incrementHotGeneration();
{
const Fun1 = () => {
React.useEffect(() => {
mount('test2');
return unmount;
}, []);
return 'fun2';
};
ReactDom.render(<Fun1 />, el);
}
await tick();
expect(el.innerHTML).toEqual('fun2');
expect(mount).toHaveBeenCalledWith('test1');
expect(mount).not.toHaveBeenCalledWith('test2');
expect(unmount).not.toHaveBeenCalled();
});
it('should fail component comparator', async () => {
const mount = jest.fn();
const unmount = jest.fn();
const Fun1 = () => {
React.useEffect(() => {
mount('test1');
return unmount;
}, []);
return 'fun1';
};
const el = document.createElement('div');
ReactDom.render(<Fun1 />, el);
expect(el.innerHTML).toEqual('fun1');
incrementHotGeneration();
{
const Fun2 = () => {
React.useEffect(() => {
mount('test2');
return unmount;
}, []);
return 'fun2';
};
ReactDom.render(<Fun2 />, el);
}
await tick();
expect(el.innerHTML).toEqual('fun2');
expect(mount).toHaveBeenCalledWith('test1');
expect(mount).toHaveBeenCalledWith('test2');
expect(unmount).toHaveBeenCalled();
});
it('should reload hook effect', async () => {
const mount = jest.fn();
const unmount = jest.fn();
const Fun1 = () => {
React.useEffect(
() => {
mount('test1');
return unmount;
},
['hot'],
);
return 'fun1';
};
const el = document.createElement('div');
ReactDom.render(<Fun1 />, el);
expect(el.innerHTML).toEqual('fun1');
incrementHotGeneration();
{
const Fun1 = () => {
React.useEffect(
() => {
mount('test2');
return unmount;
},
['hot'],
);
return 'fun2';
};
ReactDom.render(<Fun1 />, el);
}
await tick();
expect(el.innerHTML).toEqual('fun2');
expect(mount).toHaveBeenCalledWith('test1');
expect(unmount).toHaveBeenCalled();
expect(mount).toHaveBeenCalledWith('test2');
});
it('should reset hook comparator', async () => {
const Fun1 = () => {
const [state, setState] = React.useState('test0');
React.useEffect(() => setState('test1'), []);
return state;
};
const el = document.createElement('div');
ReactDom.render(<Fun1 />, el);
expect(el.innerHTML).toEqual('test0');
await tick();
expect(el.innerHTML).toEqual('test1');
incrementHotGeneration();
{
const Fun1 = () => {
const [state, setState] = React.useState('test0');
React.useEffect(() => setState('test2'), []);
return state;
};
ReactDom.render(<Fun1 />, el);
}
await tick();
expect(el.innerHTML).toEqual('test1');
incrementHotGeneration();
{
const f = () => React.useState(0); // aka fail
const Fun1 = () => {
const [state, setState] = React.useState('test0');
React.useEffect(() => setState('test3'), []);
f();
return 'h' + state;
};
ReactHotLoader.signature(Fun1, 'somevalue');
ReactDom.render(<Fun1 />, el);
}
await tick();
expect(el.innerHTML).toEqual('htest3');
});
it('should support classes', async () => {
class Comp1 extends React.Component {
state = {
x: 1,
};
render() {
return 'test1' + this.state.x;
}
}
Comp1.displayName = 'Comp1';
const el = document.createElement('div');
ReactDom.render(<Comp1 />, el);
expect(el.innerHTML).toEqual('test11');
if (configuration.intergratedResolver) {
expect(<Comp1 />.type).toBe(Comp1);
}
incrementHotGeneration();
{
class Comp1 extends React.Component {
state = {
x: 2,
};
render() {
return 'test2' + this.state.x;
}
}
Comp1.displayName = 'Comp1';
ReactDom.render(<Comp1 />, el);
}
await tick();
expect(el.innerHTML).toEqual('test21');
});
it('should support registered classes', async () => {
class Comp1 extends React.Component {
state = {
x: 1,
};
render() {
return 'test1' + this.state.x;
}
}
ReactHotLoader.register(Comp1, 'comp1', 'test');
const el = document.createElement('div');
ReactDom.render(<Comp1 />, el);
expect(el.innerHTML).toEqual('test11');
if (configuration.intergratedResolver) {
expect(<Comp1 />.type).toBe(Comp1);
}
incrementHotGeneration();
{
class Comp1 extends React.Component {
state = {
x: 2,
};
render() {
return 'test2' + this.state.x;
}
}
ReactHotLoader.register(Comp1, 'comp1', 'test');
ReactDom.render(<Comp1 />, el);
}
await tick();
expect(el.innerHTML).toEqual('test21');
});
it('support lazy memo forward', () => {
const spy = jest.fn();
const sandbox = x => {
const Comp = () => {
React.useEffect(() => () => spy(), []);
return <div>lazy {x}</div>;
};
ReactHotLoader.register(Comp, 'S1Comp', 'test');
// use sync importer
const importer = {
then(x) {
const result = x({ default: Comp });
return {
then(cb) {
cb(result);
},
};
},
};
const Lazy = React.lazy(() => importer);
ReactHotLoader.register(Lazy, 'S1Lazy', 'test');
const Forward = React.forwardRef(() => (
<Suspense fallback="loading">
<Lazy />
</Suspense>
));
const Memo = Forward; // React.memo(Forward);
ReactHotLoader.register(Memo, 'S1Memo', 'test');
return () => (
<AppContainer>
<Memo />
</AppContainer>
);
};
const S1 = sandbox(1);
ReactHotLoader.register(S1, 'S1', 'test');
const el = document.createElement('div');
ReactDom.render(<S1 />, el);
expect(el.innerHTML).toEqual('<div>lazy 1</div>');
expect(spy).not.toHaveBeenCalled();
incrementHotGeneration();
const S2 = sandbox(2);
ReactHotLoader.register(S2, 'S1', 'test');
ReactDom.render(<S2 />, el);
expect(el.innerHTML).toEqual('<div>lazy 2</div>');
expect(spy).not.toHaveBeenCalled();
});
} else {
it('target platform does not support useContext', () => {
expect(true).toBe(true);
});
}
});