/
ReactRefresh.test.ts
223 lines (184 loc) · 5.39 KB
/
ReactRefresh.test.ts
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/* eslint-env jest */
import { sandbox } from 'development-sandbox'
import { FileRef, nextTestSetup } from 'e2e-utils'
import path from 'path'
import { outdent } from 'outdent'
describe('ReactRefresh app', () => {
const { next } = nextTestSetup({
files: new FileRef(path.join(__dirname, 'fixtures', 'default-template')),
dependencies: {
react: '19.0.0-beta-4508873393-20240430',
'react-dom': '19.0.0-beta-4508873393-20240430',
},
skipStart: true,
})
test('can edit a component without losing state', async () => {
const { session, cleanup } = await sandbox(next)
await session.patch(
'index.js',
outdent`
import { useCallback, useState } from 'react'
export default function Index() {
const [count, setCount] = useState(0)
const increment = useCallback(() => setCount(c => c + 1), [setCount])
return (
<main>
<p>{count}</p>
<button onClick={increment}>Increment</button>
</main>
)
}
`
)
await session.evaluate(() => document.querySelector('button').click())
expect(
await session.evaluate(() => document.querySelector('p').textContent)
).toBe('1')
await session.patch(
'index.js',
outdent`
import { useCallback, useState } from 'react'
export default function Index() {
const [count, setCount] = useState(0)
const increment = useCallback(() => setCount(c => c + 1), [setCount])
return (
<main>
<p>Count: {count}</p>
<button onClick={increment}>Increment</button>
</main>
)
}
`
)
expect(
await session.evaluate(() => document.querySelector('p').textContent)
).toBe('Count: 1')
await session.evaluate(() => document.querySelector('button').click())
expect(
await session.evaluate(() => document.querySelector('p').textContent)
).toBe('Count: 2')
await cleanup()
})
test('cyclic dependencies', async () => {
const { session, cleanup } = await sandbox(next)
await session.write(
'NudgeOverview.js',
outdent`
import * as React from 'react';
import { foo } from './routes';
const NudgeOverview = () => {
return <span />;
foo;
};
export default NudgeOverview;
`
)
await session.write(
'SurveyOverview.js',
outdent`
const SurveyOverview = () => {
return 100;
};
export default SurveyOverview;
`
)
await session.write(
'Milestones.js',
outdent`
import React from 'react';
import { fragment } from './DashboardPage';
const Milestones = props => {
return <span />;
fragment;
};
export default Milestones;
`
)
await session.write(
'DashboardPage.js',
outdent`
import React from 'react';
import Milestones from './Milestones';
import SurveyOverview from './SurveyOverview';
import NudgeOverview from './NudgeOverview';
export const fragment = {};
const DashboardPage = () => {
return (
<>
<Milestones />
<SurveyOverview />
<NudgeOverview />
</>
);
};
export default DashboardPage;
`
)
await session.write(
'routes.js',
outdent`
import DashboardPage from './DashboardPage';
export const foo = {};
console.warn('DashboardPage at import time:', DashboardPage);
setTimeout(() => console.warn('DashboardPage after:', DashboardPage), 0);
export default DashboardPage;
`
)
await session.patch(
'index.js',
outdent`
import * as React from 'react';
import DashboardPage from './routes';
const HeroApp = (props) => {
return <p>Hello. {DashboardPage ? <DashboardPage /> : null}</p>;
};
export default HeroApp;
`
)
expect(
await session.evaluate(() => document.querySelector('p').textContent)
).toBe('Hello. 100')
let didFullRefresh = !(await session.patch(
'SurveyOverview.js',
outdent`
const SurveyOverview = () => {
return 200;
};
export default SurveyOverview;
`
))
expect(
await session.evaluate(() => document.querySelector('p').textContent)
).toBe('Hello. 200')
expect(didFullRefresh).toBe(false)
didFullRefresh = !(await session.patch(
'index.js',
outdent`
import * as React from 'react';
import DashboardPage from './routes';
const HeroApp = (props) => {
return <p>Hello: {DashboardPage ? <DashboardPage /> : null}</p>;
};
export default HeroApp;
`
))
expect(
await session.evaluate(() => document.querySelector('p').textContent)
).toBe('Hello: 200')
expect(didFullRefresh).toBe(false)
didFullRefresh = !(await session.patch(
'SurveyOverview.js',
outdent`
const SurveyOverview = () => {
return 300;
};
export default SurveyOverview;
`
))
expect(
await session.evaluate(() => document.querySelector('p').textContent)
).toBe('Hello: 300')
expect(didFullRefresh).toBe(false)
await cleanup()
})
})