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/* eslint-env jest */
import { createSandbox } from 'development-sandbox'
import { FileRef, nextTestSetup } from 'e2e-utils'
import path from 'path'
import { check } from 'next-test-utils'
import { outdent } from 'outdent'
describe('Error Overlay for server components', () => {
const { next } = nextTestSetup({
files: new FileRef(path.join(__dirname, 'fixtures', 'default-template')),
skipStart: true,
})
describe('createContext called in Server Component', () => {
it('should show error when React.createContext is called', async () => {
await using sandbox = await createSandbox(
next,
new Map([
[
'app/page.js',
outdent`
import React from 'react'
const Context = React.createContext()
export default function Page() {
return (
<>
<Context.Provider value="hello">
<h1>Page</h1>
</Context.Provider>
</>
)
}
`,
],
])
)
const { browser } = sandbox
await check(async () => {
expect(
await browser
.waitForElementByCss('#nextjs__container_errors_desc')
.text()
).toContain(
'createContext only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/context-in-server-component'
)
return 'success'
}, 'success')
expect(next.cliOutput).toContain(
'createContext only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/context-in-server-component'
)
})
it('should show error when React.createContext is called in external package', async () => {
await using sandbox = await createSandbox(
next,
new Map([
[
'node_modules/my-package/index.js',
outdent`
const React = require('react')
module.exports = React.createContext()
`,
],
[
'node_modules/my-package/package.json',
outdent`
{
"name": "my-package",
"version": "0.0.1"
}
`,
],
[
'app/page.js',
outdent`
import Context from 'my-package'
export default function Page() {
return (
<>
<Context.Provider value="hello">
<h1>Page</h1>
</Context.Provider>
</>
)
}
`,
],
])
)
const { browser } = sandbox
await check(async () => {
expect(
await browser
.waitForElementByCss('#nextjs__container_errors_desc')
.text()
).toContain(
'createContext only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/context-in-server-component'
)
return 'success'
}, 'success')
expect(next.cliOutput).toContain(
'createContext only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/context-in-server-component'
)
})
it('should show error when createContext is called in external package', async () => {
await using sandbox = await createSandbox(
next,
new Map([
[
'node_modules/my-package/index.js',
outdent`
const { createContext } = require('react')
module.exports = createContext()
`,
],
[
'node_modules/my-package/package.json',
outdent`
{
"name": "my-package",
"version": "0.0.1"
}
`,
],
[
'app/page.js',
outdent`
import Context from 'my-package'
export default function Page() {
return (
<>
<Context.Provider value="hello">
<h1>Page</h1>
</Context.Provider>
</>
)
}
`,
],
])
)
const { browser } = sandbox
await check(async () => {
expect(
await browser
.waitForElementByCss('#nextjs__container_errors_desc')
.text()
).toContain(
'createContext only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/context-in-server-component'
)
return 'success'
}, 'success')
expect(next.cliOutput).toContain(
'createContext only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/context-in-server-component'
)
})
})
describe('React component hooks called in Server Component', () => {
it('should show error when React.<client-hook> is called', async () => {
await using sandbox = await createSandbox(
next,
new Map([
[
'app/page.js',
outdent`
import React from 'react'
export default function Page() {
const ref = React.useRef()
return "Hello world"
}
`,
],
])
)
const { browser } = sandbox
await check(async () => {
expect(
await browser
.waitForElementByCss('#nextjs__container_errors_desc')
.text()
).toContain(
'useRef only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/react-client-hook-in-server-component'
)
return 'success'
}, 'success')
expect(next.cliOutput).toContain(
'useRef only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/react-client-hook-in-server-component'
)
})
it('should show error when React.experiment_useOptimistic is called', async () => {
await using sandbox = await createSandbox(
next,
new Map([
[
'app/page.js',
outdent`
import React from 'react'
export default function Page() {
const optimistic = React.experimental_useOptimistic()
return "Hello world"
}
`,
],
])
)
const { browser } = sandbox
await check(async () => {
expect(
await browser
.waitForElementByCss('#nextjs__container_errors_desc')
.text()
).toContain(
'experimental_useOptimistic only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/react-client-hook-in-server-component'
)
return 'success'
}, 'success')
expect(next.cliOutput).toContain(
'experimental_useOptimistic only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/react-client-hook-in-server-component'
)
})
it('should show error when React.experiment_useOptimistic is renamed in destructuring', async () => {
await using sandbox = await createSandbox(
next,
new Map([
[
'app/page.js',
outdent`
import { experimental_useOptimistic as useOptimistic } from 'react'
export default function Page() {
const optimistic = useOptimistic()
return "Hello world"
}
`,
],
])
)
const { browser } = sandbox
await check(async () => {
const html = await browser.eval('document.documentElement.innerHTML')
expect(html).toContain('experimental_useOptimistic')
return 'success'
}, 'success')
expect(next.cliOutput).toContain('experimental_useOptimistic')
})
it('should show error when React.<client-hook> is called in external package', async () => {
await using sandbox = await createSandbox(
next,
new Map([
[
'node_modules/my-package/index.js',
outdent`
const React = require('react')
module.exports = function Component() {
const [state, useState] = React.useState()
return "Hello world"
}
`,
],
[
'node_modules/my-package/package.json',
outdent`
{
"name": "my-package",
"version": "0.0.1"
}
`,
],
[
'app/page.js',
outdent`
import Component from 'my-package'
export default function Page() {
return <Component />
}
`,
],
])
)
const { browser } = sandbox
await check(async () => {
expect(
await browser
.waitForElementByCss('#nextjs__container_errors_desc')
.text()
).toContain(
'useState only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/react-client-hook-in-server-component'
)
return 'success'
}, 'success')
expect(next.cliOutput).toContain(
'useState only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/react-client-hook-in-server-component'
)
})
it('should show error when React client hook is called in external package', async () => {
await using sandbox = await createSandbox(
next,
new Map([
[
'node_modules/my-package/index.js',
outdent`
const { useEffect } = require('react')
module.exports = function Component() {
useEffect(() => {}, [])
return "Hello world"
}
`,
],
[
'node_modules/my-package/package.json',
outdent`
{
"name": "my-package",
"version": "0.0.1"
}
`,
],
[
'app/page.js',
outdent`
import Component from 'my-package'
export default function Page() {
return <Component />
}
`,
],
])
)
const { browser } = sandbox
await check(async () => {
expect(
await browser
.waitForElementByCss('#nextjs__container_errors_desc')
.text()
).toContain(
'useEffect only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/react-client-hook-in-server-component'
)
return 'success'
}, 'success')
expect(next.cliOutput).toContain(
'useEffect only works in Client Components. Add the "use client" directive at the top of the file to use it. Read more: https://nextjs.org/docs/messages/react-client-hook-in-server-component'
)
})
})
describe('Class component used in Server Component', () => {
it('should show error when Class Component is used', async () => {
await using sandbox = await createSandbox(
next,
new Map([
[
'app/page.js',
outdent`
import React from 'react'
export default class Page extends React.Component {
render() {
return <p>Hello world</p>
}
}
`,
],
])
)
const { browser } = sandbox
await check(async () => {
expect(
await browser
.waitForElementByCss('#nextjs__container_errors_desc')
.text()
).toContain(
'This might be caused by a React Class Component being rendered in a Server Component'
)
return 'success'
}, 'success')
expect(next.cliOutput).toContain(
'This might be caused by a React Class Component being rendered in a Server Component'
)
})
it('should show error when React.PureComponent is rendered in external package', async () => {
await using sandbox = await createSandbox(
next,
new Map([
[
'node_modules/my-package/index.js',
outdent`
const React = require('react')
module.exports = class extends React.PureComponent {
render() {
return "Hello world"
}
}
`,
],
[
'node_modules/my-package/package.json',
outdent`
{
"name": "my-package",
"version": "0.0.1"
}
`,
],
[
'app/page.js',
outdent`
import Component from 'my-package'
export default function Page() {
return <Component />
}
`,
],
])
)
const { browser } = sandbox
await check(async () => {
expect(
await browser
.waitForElementByCss('#nextjs__container_errors_desc')
.text()
).toContain(
'This might be caused by a React Class Component being rendered in a Server Component'
)
return 'success'
}, 'success')
expect(next.cliOutput).toContain(
'This might be caused by a React Class Component being rendered in a Server Component'
)
})
it('should show error when Component is rendered in external package', async () => {
await using sandbox = await createSandbox(
next,
new Map([
[
'node_modules/my-package/index.js',
outdent`
const { Component } = require('react')
module.exports = class extends Component {
render() {
return "Hello world"
}
}
`,
],
[
'node_modules/my-package/package.json',
outdent`
{
"name": "my-package",
"version": "0.0.1"
}
`,
],
[
'app/page.js',
outdent`
import Component from 'my-package'
export default function Page() {
return <Component />
}
`,
],
])
)
const { browser } = sandbox
await check(async () => {
expect(
await browser
.waitForElementByCss('#nextjs__container_errors_desc')
.text()
).toContain(
'This might be caused by a React Class Component being rendered in a Server Component'
)
return 'success'
}, 'success')
expect(next.cliOutput).toContain(
'This might be caused by a React Class Component being rendered in a Server Component'
)
})
})
describe('Next.js navigation client hooks called in Server Component', () => {
it.each([
['useParams'],
['useRouter'],
['usePathname'],
['useSearchParams'],
['useSelectedLayoutSegment'],
['useSelectedLayoutSegments'],
])('should show error when %s is called', async (hook: string) => {
await using sandbox = await createSandbox(
next,
new Map([
[
'app/page.js',
outdent`
import { ${hook} } from 'next/navigation'
export default function Page() {
return "Hello world"
}
`,
],
])
)
const { session } = sandbox
await session.assertHasRedbox()
// In webpack when the message too long it gets truncated with ` | ` with new lines.
// So we need to check for the first part of the message.
const normalizedSource = await session.getRedboxSource()
expect(normalizedSource).toContain(
`You're importing a component that needs \`${hook}\`. This React Hook only works in a Client Component. To fix, mark the file (or its parent) with the \`"use client"\` directive.`
)
expect(normalizedSource).toContain(
`import { ${hook} } from 'next/navigation'`
)
})
})
describe('Next.js link client hooks called in Server Component', () => {
it.each([['useLinkStatus']])(
'should show error when %s is called',
async (hook: string) => {
await using sandbox = await createSandbox(
next,
new Map([
[
'app/page.js',
outdent`
import { ${hook} } from 'next/link'
export default function Page() {
return "Hello world"
}
`,
],
])
)
const { session } = sandbox
await session.assertHasRedbox()
// In webpack when the message too long it gets truncated with ` | ` with new lines.
// So we need to check for the first part of the message.
const normalizedSource = await session.getRedboxSource()
expect(normalizedSource).toContain(
`You're importing a component that needs \`${hook}\`. This React Hook only works in a Client Component. To fix, mark the file (or its parent) with the \`"use client"\` directive.`
)
expect(normalizedSource).toContain(
`import { ${hook} } from 'next/link'`
)
}
)
})
})
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