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import { nextTestSetup } from 'e2e-utils'
describe('browser-chunks', () => {
const { next } = nextTestSetup({
files: __dirname,
skipDeployment: true,
})
let sources = []
beforeAll(async () => {
const sourcemaps = await next.readFiles('.next/static/chunks', (filename) =>
filename.endsWith('.js.map')
)
sources = sourcemaps.flatMap((sourcemap) => JSON.parse(sourcemap).sources)
})
it('must not bundle any server modules into browser chunks', () => {
const serverSources = sources.filter(
(source) =>
/webpack:\/\/_N_E\/(\.\.\/)*src\/server\//.test(source) ||
source.includes('next/dist/esm/server') ||
source.includes('next/dist/server') ||
source.includes('next-devtools/server')
)
if (serverSources.length > 0) {
console.error(
`Found the following server modules:\n ${serverSources.join('\n ')}\nIf any of these modules are allowed to be included in browser chunks, move them to src/shared or src/client.`
)
throw new Error('Did not expect any server modules in browser chunks.')
}
})
it('must not bundle any dev overlay into browser chunks', () => {
const devOverlaySources = sources.filter((source) => {
return source.includes('next-devtools')
})
if (devOverlaySources.length > 0) {
const message = `Found the following dev overlay modules:\n ${devOverlaySources.join('\n')}`
console.error(
`${message}\nIf any of these modules are allowed to be included in production chunks, check the import and render conditions.`
)
throw new Error(
'Did not expect any dev overlay modules in browser chunks.\n' + message
)
}
})
})
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