Download next.js/test/lib/test-data-service/writer.ts from Devendra174/react-code-dataset: direct link, hf CLI and curl.
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| import http from 'http' | |
| type TestDataResponse = { | |
| _res: http.ServerResponse | |
| resolve: (value?: string) => any | |
| reject: (value: any) => any | |
| } | |
| type TestDataServer = { | |
| _server: http.Server | |
| listen: (port: number) => void | |
| close: () => void | |
| } | |
| // Creates a lightweight HTTP server for use in e2e testing. This simulates the | |
| // data service that would be used in a real Next.js application, whether it's | |
| // direct database access, an ORM, or a higher-level data access layer. The e2e | |
| // test can observe when individual requests are received, and control the | |
| // timing of when the data is fulfilled, without needing to mock any lower | |
| // level I/O. | |
| // | |
| // Receives requests of the form: /?key=foo | |
| // | |
| // Responds in plain text. By default, the response is the key itself, but the | |
| // e2e test can respond with any text it wants. | |
| // | |
| // Examples: | |
| // response.resolve() // Responds with the key itself | |
| // response.resolve('custom') // Responds with custom text | |
| // response.reject(new Error('oops!')) // Responds with a 500 error | |
| // | |
| // Based on the AsyncText pattern used in the React repo. | |
| export function createTestDataServer( | |
| onRequest: (key: string, response: TestDataResponse) => any | |
| ): TestDataServer { | |
| const httpServer = http.createServer(async (req, res) => { | |
| const searchParams = new URL(req.url!, 'http://n').searchParams | |
| const key = searchParams.get('key') | |
| if (typeof key !== 'string') { | |
| res.statusCode = 400 | |
| const msg = 'Missing key parameter' | |
| res.end(msg) | |
| return | |
| } | |
| const response: TestDataResponse = { | |
| _res: res, | |
| resolve(value?: string) { | |
| res.end(value === undefined ? key : value) | |
| }, | |
| reject(error: Error, status?: number) { | |
| res.statusCode = status ?? 500 | |
| res.end(error.message ?? `Failed to fetch data for "${key}"`) | |
| }, | |
| } | |
| try { | |
| const result = await onRequest(key, response) | |
| if (typeof result === 'string') { | |
| response.resolve(result) | |
| } | |
| } catch (error) { | |
| response.reject(error) | |
| } | |
| }) | |
| return { | |
| _server: httpServer, | |
| listen(port: number) { | |
| httpServer.listen(port) | |
| }, | |
| close() { | |
| httpServer.close() | |
| }, | |
| } | |
| } | |