Function createFakeAIService

src/node/services/sideQuestionService.test.ts:38–46

* Fake AIService for side-question tests. `getStreamInfo` defaults to * "no main-agent stream is in flight" so the side question records no * interruption metadata; callers that want to exercise the split path * override it with a `streamInfo` arg.

(
  model: LanguageModel,
  streamInfo?: ReturnType<AIService["getStreamInfo"]>
)

 * override it with a `streamInfo` arg.
 */
function createFakeAIService(
  model: LanguageModel,
  streamInfo?: ReturnType<AIService["getStreamInfo"]>
): SideQuestionAIService {
  return {
    createModel: () => Promise.resolve(Ok(model)),
    getStreamInfo: () => streamInfo,
  };
}

/** Fake textStream that emits a fixed sequence of chunks. */
function fakeTextStream(chunks: readonly string[]) {