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import { retry } from 'next-test-utils'
describe('server-components-hmr-cache', () => {
const { next } = nextTestSetup({ files: __dirname, patchFileDelay: 1000 })
const loggedAfterValueRegexp = /After: (\d\.\d+)/
let cliOutputLength: number
const getLoggedAfterValue = () => {
const match = next.cliOutput
.slice(cliOutputLength)
.match(loggedAfterValueRegexp)
if (!match) {
throw new Error('No logs from after() found')
}
return match[1]
}
describe.each(['edge', 'node'])('%s runtime', (runtime) => {
it('should use cached fetch calls for fast refresh requests', async () => {
const browser = await next.browser(`/${runtime}`)
const valueBeforePatch = await browser.elementById('value').text()
await next.patchFile(
'components/shared-page.tsx',
(content) => content.replace('foo', 'bar'),
async () => {
await retry(async () => {
const updatedContent = await browser.elementById('content').text()
expect(updatedContent).toBe('bar')
// TODO: remove custom duration in case we increase the default.
}, 5000)
const valueAfterPatch = await browser.elementById('value').text()
expect(valueBeforePatch).toEqual(valueAfterPatch)
}
)
})
it('should not use cached fetch calls for intentional refresh requests', async () => {
const browser = await next.browser(`/${runtime}`)
const valueBeforeRefresh = await browser.elementById('value').text()
await browser.elementByCss(`button`).click().waitForIdleNetwork()
await retry(async () => {
const valueAfterRefresh = await browser.elementById('value').text()
expect(valueBeforeRefresh).not.toEqual(valueAfterRefresh)
// TODO: remove custom duration in case we increase the default.
}, 5000)
})
describe('in after()', () => {
beforeEach(() => {
cliOutputLength = next.cliOutput.length
})
it('should use cached fetch calls for fast refresh requests', async () => {
const browser = await next.browser(`/${runtime}`)
const valueBeforePatch = await retry(() => getLoggedAfterValue())
cliOutputLength = next.cliOutput.length
await next.patchFile(
'components/shared-page.tsx',
(content) => content.replace('foo', 'bar'),
async () => {
await retry(async () => {
const updatedContent = await browser.elementById('content').text()
expect(updatedContent).toBe('bar')
// TODO: remove custom duration in case we increase the default.
}, 5000)
const valueAfterPatch = await retry(() => getLoggedAfterValue())
expect(valueBeforePatch).toEqual(valueAfterPatch)
}
)
})
it('should not use cached fetch calls for intentional refresh requests', async () => {
const browser = await next.browser(`/${runtime}`)
const valueBeforeRefresh = await retry(() => getLoggedAfterValue())
cliOutputLength = next.cliOutput.length
await browser.elementByCss(`button`).click().waitForIdleNetwork()
await retry(async () => {
const valueAfterRefresh = getLoggedAfterValue()
expect(valueBeforeRefresh).not.toEqual(valueAfterRefresh)
// TODO: remove custom duration in case we increase the default.
}, 5000)
})
})
describe('with cacheMaxMemorySize set to 0', () => {
beforeAll(async () => {
await next.patchFile('next.config.js', (content) =>
content.replace('// cacheMaxMemorySize: 0,', 'cacheMaxMemorySize: 0,')
)
})
afterAll(async () => {
await next.patchFile('next.config.js', (content) =>
content.replace('cacheMaxMemorySize: 0,', '// cacheMaxMemorySize: 0,')
)
})
it('should not warn about "Single item size exceeds maxSize"', async () => {
const initialOutputLength = next.cliOutput.length
const browser = await next.browser(`/${runtime}`)
await browser.elementById('value').text()
await next.patchFile(
'components/shared-page.tsx',
(content) => content.replace('foo', 'bar'),
async () => {
await retry(async () => {
const updatedContent = await browser.elementById('content').text()
expect(updatedContent).toBe('bar')
}, 5000)
// Verify the warning does not appear
const newOutput = next.cliOutput.slice(initialOutputLength)
expect(newOutput).not.toContain('Single item size exceeds maxSize')
}
)
})
it('should still use cached fetch calls for fast refresh requests', async () => {
const browser = await next.browser(`/${runtime}`)
const valueBeforePatch = await browser.elementById('value').text()
await next.patchFile(
'components/shared-page.tsx',
(content) => content.replace('foo', 'bar'),
async () => {
await retry(async () => {
const updatedContent = await browser.elementById('content').text()
expect(updatedContent).toBe('bar')
}, 5000)
// HMR cache should still work even with cacheMaxMemorySize: 0
const valueAfterPatch = await browser.elementById('value').text()
expect(valueBeforePatch).toEqual(valueAfterPatch)
}
)
})
})
describe('with experimental.serverComponentsHmrCache disabled', () => {
beforeAll(async () => {
// Wait for server to be ready
await next.fetch('/404')
await next.patchFile('next.config.js', (content) =>
content.replace(
'// serverComponentsHmrCache: false,',
'serverComponentsHmrCache: false,'
)
)
})
afterAll(async () => {
await next.patchFile('next.config.js', (content) =>
content.replace(
'serverComponentsHmrCache: false,',
'// serverComponentsHmrCache: false,'
)
)
})
it('should not use cached fetch calls for fast refresh requests', async () => {
const browser = await next.browser(`/${runtime}`)
const valueBeforePatch = await browser.elementById('value').text()
await next.patchFile(
'components/shared-page.tsx',
(content) => content.replace('foo', 'bar'),
async () => {
await retry(async () => {
const updatedContent = await browser.elementById('content').text()
expect(updatedContent).toBe('bar')
// TODO: remove custom duration in case we increase the default.
}, 5000)
const valueAfterPatch = await browser.elementById('value').text()
expect(valueBeforePatch).not.toEqual(valueAfterPatch)
}
)
})
describe('in after()', () => {
beforeEach(() => {
cliOutputLength = next.cliOutput.length
})
it('should not use cached fetch calls for fast refresh requests', async () => {
const browser = await next.browser(`/${runtime}`)
const valueBeforePatch = await retry(() => getLoggedAfterValue())
cliOutputLength = next.cliOutput.length
await next.patchFile(
'components/shared-page.tsx',
(content) => content.replace('foo', 'bar'),
async () => {
await retry(async () => {
const updatedContent = await browser
.elementById('content')
.text()
expect(updatedContent).toBe('bar')
// TODO: remove custom duration in case we increase the default.
}, 5000)
const valueAfterPatch = await retry(() => getLoggedAfterValue())
expect(valueBeforePatch).not.toEqual(valueAfterPatch)
}
)
})
})
})
})
})
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