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import { createNext } from 'e2e-utils'
import { NextInstance } from 'e2e-utils'
import { fetchViaHTTP } from 'next-test-utils'
import path from 'path'
const files = {
'pages/index.js': `
export default function Page() {
return <p>hello world</p>
}
`,
'middleware.js': `
import { NextResponse } from 'next/server'
if (typeof EdgeRuntime === 'undefined') {
console.log("EdgeRuntime is undefined");
} else {
console.log("EdgeRuntime is defined");
}
export default (req) => {
return NextResponse.next({
headers: {
'x-runtime-version': EdgeRuntime,
'x-runtime-version-dynamic': getDynamicRuntimeVersion(self)
}
})
}
function getDynamicRuntimeVersion(from) {
return from.EdgeRuntime;
}
`,
}
describe('Edge Runtime is addressable', () => {
let next: NextInstance
beforeAll(async () => {
next = await createNext({
files,
dependencies: {},
})
})
afterAll(() => next.destroy())
test('EdgeRuntime evaluates to a string', async () => {
const resp = await fetchViaHTTP(next.url, '/')
expect(await resp.text()).toContain('hello world')
expect(Object.fromEntries(resp.headers)).toMatchObject({
'x-runtime-version': 'edge-runtime',
'x-runtime-version-dynamic': 'edge-runtime',
})
})
test('removes the undefined branch with dead code elimination', async () => {
const middlewareManifest = await next.readJSON(
'.next/server/middleware-manifest.json'
)
const files = middlewareManifest.middleware['/'].files
let allContentCombined = ''
for (const file of files) {
const content = await next.readFile(path.join('.next', file))
allContentCombined += content
}
expect(allContentCombined).toContain('EdgeRuntime is defined')
expect(allContentCombined).not.toContain('EdgeRuntime is undefined')
})
})
describe('Edge Runtime can be set to the production provider', () => {
let next: NextInstance
beforeAll(async () => {
next = await createNext({
files,
dependencies: {},
env: {
NEXT_EDGE_RUNTIME_PROVIDER: 'vercel',
},
})
})
afterAll(() => next.destroy())
test('EdgeRuntime evaluates to a string', async () => {
const resp = await fetchViaHTTP(next.url, '/')
expect(await resp.text()).toContain('hello world')
expect(Object.fromEntries(resp.headers)).toMatchObject({
'x-runtime-version': 'vercel',
// We don't test for x-runtime-version-dynamic here
// because the tests are using edge-runtime and not Vercel
// as the provider.
})
})
})
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