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23 changes: 23 additions & 0 deletions packages/zip-it-and-ship-it/tests/v2api.test.ts
Original file line number Diff line number Diff line change
Expand Up @@ -550,4 +550,27 @@ describe.runIf(semver.gte(nodeVersion, '18.13.0'))('V2 functions API', () => {
expect(func.displayName).toBe('SSR Function')
expect(func.generator).toBe('next-runtime@1.2.3')
})

testMany(
'Bootstrap is imported before user code so it can apply side-effects before the user code runs',
['bundler_default', 'bundler_esbuild', 'bundler_esbuild_zisi', 'bundler_default_nft', 'bundler_nft'],
async (options) => {
const { files } = await zipFixture('v2-api', {
fixtureDir: FIXTURES_ESM_DIR,
opts: options,
})

const unzippedFunctions = await unzipFiles(files)

const contents = await readFile(join(unzippedFunctions[0].unzipPath, files[0].entryFilename), {
encoding: 'utf-8',
})
const positionOfBootstrapImport = contents.indexOf('___netlify-bootstrap.mjs')
const positionOfUserCodeImport = contents.indexOf('function.mjs')

expect(positionOfBootstrapImport).toBeGreaterThan(0)
expect(positionOfUserCodeImport).toBeGreaterThan(0)
expect(positionOfBootstrapImport).toBeLessThan(positionOfUserCodeImport)
},
)
})