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[8.x] [RCA] AI-assisted root cause analysis (elastic#197200) (elastic…
…#203767) # Backport This will backport the following commits from `main` to `8.x`: - [[RCA] AI-assisted root cause analysis (elastic#197200)](elastic#197200) <!--- Backport version: 7.3.2 --> ### Questions ? Please refer to the [Backport tool documentation](https://github.com/sqren/backport) <!--BACKPORT {commits} BACKPORT-->
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198 changes: 198 additions & 0 deletions
198
packages/kbn-sse-utils-server/src/observable_into_event_source_stream.test.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,198 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the "Elastic License | ||
| * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side | ||
| * Public License v 1"; you may not use this file except in compliance with, at | ||
| * your election, the "Elastic License 2.0", the "GNU Affero General Public | ||
| * License v3.0 only", or the "Server Side Public License, v 1". | ||
| */ | ||
|
|
||
| import { Logger } from '@kbn/logging'; | ||
| import { observableIntoEventSourceStream } from './observable_into_event_source_stream'; | ||
| import { PassThrough } from 'node:stream'; | ||
| import { Subject } from 'rxjs'; | ||
| import { ServerSentEvent, ServerSentEventType } from '@kbn/sse-utils/src/events'; | ||
| import { | ||
| ServerSentEventErrorCode, | ||
| createSSEInternalError, | ||
| createSSERequestError, | ||
| } from '@kbn/sse-utils/src/errors'; | ||
|
|
||
| describe('observableIntoEventSourceStream', () => { | ||
| let logger: jest.Mocked<Logger>; | ||
|
|
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| let controller: AbortController; | ||
|
|
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| let stream: PassThrough; | ||
| let source$: Subject<ServerSentEvent>; | ||
|
|
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| let data: string[]; | ||
|
|
||
| beforeEach(() => { | ||
| jest.useFakeTimers(); | ||
| logger = { | ||
| debug: jest.fn(), | ||
| error: jest.fn(), | ||
| } as unknown as jest.Mocked<Logger>; | ||
|
|
||
| controller = new AbortController(); | ||
| source$ = new Subject(); | ||
| data = []; | ||
|
|
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| stream = observableIntoEventSourceStream(source$, { logger, signal: controller.signal }); | ||
| stream.on('data', (chunk) => { | ||
| data.push(chunk.toString()); | ||
| }); | ||
| }); | ||
|
|
||
| afterEach(() => { | ||
| jest.clearAllTimers(); | ||
| }); | ||
|
|
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| it('writes events into the stream in SSE format', () => { | ||
| source$.next({ type: ServerSentEventType.data, data: { foo: 'bar' } }); | ||
| source$.complete(); | ||
|
|
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| jest.runAllTimers(); | ||
|
|
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| expect(data).toEqual(['event: data\ndata: {"data":{"foo":"bar"}}\n\n']); | ||
| }); | ||
|
|
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| it('handles SSE errors', () => { | ||
| const sseError = createSSEInternalError('Invalid input'); | ||
|
|
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| source$.error(sseError); | ||
|
|
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| jest.runAllTimers(); | ||
|
|
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| expect(logger.error).toHaveBeenCalledWith(sseError); | ||
| expect(logger.debug).toHaveBeenCalled(); | ||
| const debugFn = logger.debug.mock.calls[0][0] as () => string; | ||
| const loggedError = JSON.parse(debugFn()); | ||
| expect(loggedError).toEqual({ | ||
| type: 'error', | ||
| error: { | ||
| code: ServerSentEventErrorCode.internalError, | ||
| message: 'Invalid input', | ||
| meta: {}, | ||
| }, | ||
| }); | ||
|
|
||
| expect(data).toEqual([ | ||
| `event: error\ndata: ${JSON.stringify({ | ||
| error: { | ||
| code: ServerSentEventErrorCode.internalError, | ||
| message: 'Invalid input', | ||
| meta: {}, | ||
| }, | ||
| })}\n\n`, | ||
| ]); | ||
| }); | ||
|
|
||
| it('handles SSE errors with metadata', () => { | ||
| const sseError = createSSERequestError('Invalid request', 400); | ||
|
|
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| source$.error(sseError); | ||
|
|
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| jest.runAllTimers(); | ||
|
|
||
| expect(logger.error).toHaveBeenCalledWith(sseError); | ||
| expect(logger.debug).toHaveBeenCalled(); | ||
| const debugFn = logger.debug.mock.calls[0][0] as () => string; | ||
| const loggedError = JSON.parse(debugFn()); | ||
| expect(loggedError).toEqual({ | ||
| type: 'error', | ||
| error: { | ||
| code: ServerSentEventErrorCode.requestError, | ||
| message: 'Invalid request', | ||
| meta: { | ||
| status: 400, | ||
| }, | ||
| }, | ||
| }); | ||
|
|
||
| expect(data).toEqual([ | ||
| `event: error\ndata: ${JSON.stringify({ | ||
| error: { | ||
| code: ServerSentEventErrorCode.requestError, | ||
| message: 'Invalid request', | ||
| meta: { | ||
| status: 400, | ||
| }, | ||
| }, | ||
| })}\n\n`, | ||
| ]); | ||
| }); | ||
|
|
||
| it('handles non-SSE errors', () => { | ||
| const error = new Error('Non-SSE Error'); | ||
|
|
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| source$.error(error); | ||
|
|
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| jest.runAllTimers(); | ||
|
|
||
| expect(logger.error).toHaveBeenCalledWith(error); | ||
| expect(data).toEqual([ | ||
| `event: error\ndata: ${JSON.stringify({ | ||
| error: { | ||
| code: ServerSentEventErrorCode.internalError, | ||
| message: 'Non-SSE Error', | ||
| }, | ||
| })}\n\n`, | ||
| ]); | ||
| }); | ||
|
|
||
| it('should send keep-alive comments every 10 seconds', () => { | ||
| jest.advanceTimersByTime(10000); | ||
| expect(data).toContain(': keep-alive'); | ||
|
|
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| jest.advanceTimersByTime(10000); | ||
| expect(data.filter((d) => d === ': keep-alive')).toHaveLength(2); | ||
| }); | ||
|
|
||
| describe('without fake timers', () => { | ||
| beforeEach(() => { | ||
| jest.useFakeTimers({ doNotFake: ['nextTick'] }); | ||
| }); | ||
|
|
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| it('should end the stream when the observable completes', async () => { | ||
| jest.useFakeTimers({ doNotFake: ['nextTick'] }); | ||
|
|
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| const endSpy = jest.fn(); | ||
| stream.on('end', endSpy); | ||
|
|
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| source$.complete(); | ||
|
|
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| await new Promise((resolve) => process.nextTick(resolve)); | ||
|
|
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| expect(endSpy).toHaveBeenCalled(); | ||
| }); | ||
|
|
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| it('should end stream when signal is aborted', async () => { | ||
| const endSpy = jest.fn(); | ||
| stream.on('end', endSpy); | ||
|
|
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| // Emit some data | ||
| source$.next({ type: ServerSentEventType.data, data: { initial: 'data' } }); | ||
|
|
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| // Abort the signal | ||
| controller.abort(); | ||
|
|
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| // Emit more data after abort | ||
| source$.next({ type: ServerSentEventType.data, data: { after: 'abort' } }); | ||
|
|
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| await new Promise((resolve) => process.nextTick(resolve)); | ||
|
|
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| expect(endSpy).toHaveBeenCalled(); | ||
|
|
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| // Data after abort should not be received | ||
| expect(data).toEqual([ | ||
| `event: data\ndata: ${JSON.stringify({ data: { initial: 'data' } })}\n\n`, | ||
| ]); | ||
| }); | ||
|
|
||
| afterEach(() => { | ||
| jest.useFakeTimers(); | ||
| }); | ||
| }); | ||
| }); |
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