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import crypto from 'crypto'
import { NextInstance, nextTestSetup } from 'e2e-utils'
type Md5Hash = string & { __brand: 'Md5Hash' }
type Record = [filePath: string, hash: string, content: string]
interface RouteFileHashRecords {
[key: string]: Record[]
}
function generateMD5(text: string): Md5Hash {
const hash = crypto.createHash('md5')
hash.update(text)
return hash.digest('hex') as Md5Hash
}
function getNodeFileHashes(next: NextInstance): RouteFileHashRecords {
const nodeBuildFileMd5Hashes: RouteFileHashRecords = {}
for (const file of nodeFilePaths) {
const content = next.readFileSync(`.next/server/${file}.js`)
const md5 = generateMD5(content)
nodeBuildFileMd5Hashes[file] = [[file, md5, content]]
}
return nodeBuildFileMd5Hashes
}
const nodeFilePaths = [
'app/app-page/page',
'app/app-route/route',
'pages/api/pages-api',
'pages/pages-page',
]
function getEdgeRouteFileHashes(next: NextInstance): RouteFileHashRecords {
const manifest: any = JSON.parse(
next.readFileSync('.next/server/middleware-manifest.json')
)
const routeKeys = Object.keys(manifest.functions)
const hashMap: RouteFileHashRecords = {}
for (const route of routeKeys) {
const files: string[] = manifest.functions[route].files
const hashes: Record[] = []
for (const filePath of files) {
const content = next.readFileSync(`.next/${filePath}`)
hashes.push([filePath, generateMD5(content), content])
}
hashMap[route] = hashes
}
return hashMap
}
interface Runs {
run1: RouteFileHashRecords
run2: RouteFileHashRecords
}
describe('deterministic build', () => {
const { next } = nextTestSetup({
files: __dirname,
skipStart: true,
})
const edgeBuildFileMd5Hashes: Runs = {
run1: {},
run2: {},
}
const nodeBuildFileMd5Hashes: Runs = {
run1: {},
run2: {},
}
beforeAll(async () => {
// First build
await next.build()
edgeBuildFileMd5Hashes.run1 = getEdgeRouteFileHashes(next)
nodeBuildFileMd5Hashes.run1 = getNodeFileHashes(next)
// Second build
await next.build()
edgeBuildFileMd5Hashes.run2 = getEdgeRouteFileHashes(next)
nodeBuildFileMd5Hashes.run2 = getNodeFileHashes(next)
})
it('should have same md5 file across build', async () => {
expect(edgeBuildFileMd5Hashes.run1).toEqual(edgeBuildFileMd5Hashes.run2)
expect(nodeBuildFileMd5Hashes.run1).toEqual(nodeBuildFileMd5Hashes.run2)
})
})
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