Files
fusion/packages/dashboard/app/api/__tests__/legacy-chat-stream.test.ts
Fusion b8a32f8765 feat(FN-3430): preserve and consume final assistant done payload
This merge adds done-payload snapshot handling across the chat system (FN-3430), normalizing how final assistant messages are preserved and consumed in the dashboard hooks, plus it normalizes dashboard mailbox and user identity for inter-agent messaging (FN-3484) and introduces plugin workflow step

Fusion-Task-Id: FN-3430
2026-05-05 06:42:18 -07:00

93 lines
2.9 KiB
TypeScript

import { afterEach, describe, expect, it, vi } from "vitest";
import { streamChatResponse } from "../legacy";
function createChunkedStream(chunks: string[]): ReadableStream<Uint8Array> {
const encoder = new TextEncoder();
return new ReadableStream<Uint8Array>({
start(controller) {
for (const chunk of chunks) {
controller.enqueue(encoder.encode(chunk));
}
controller.close();
},
});
}
describe("streamChatResponse SSE parser", () => {
afterEach(() => {
vi.restoreAllMocks();
});
it("reconstructs text/done events split across arbitrary chunks", async () => {
const fetchMock = vi.spyOn(globalThis, "fetch").mockResolvedValue(
new Response(
createChunkedStream([
"event: text\n",
"data: \"Hel",
"lo \"\n\n",
"event: text\n",
"data: \"world\"\n\n",
"event: done\n",
"data: {\"messageId\":\"msg-1\"}\n\n",
]),
{ status: 200 },
),
);
const textChunks: string[] = [];
const donePayloads: Array<{ messageId: string; message?: { content: string } }> = [];
streamChatResponse("s-1", "hi", {
onText: (data) => textChunks.push(data),
onDone: (data) => donePayloads.push(data),
onError: vi.fn(),
});
await vi.waitFor(() => {
expect(textChunks.join("")).toBe("Hello world");
expect(donePayloads).toEqual([{ messageId: "msg-1" }]);
});
expect(fetchMock).toHaveBeenCalledTimes(1);
});
it("parses done payload assistant snapshots when present", async () => {
vi.spyOn(globalThis, "fetch").mockResolvedValue(
new Response(
createChunkedStream([
"event: done\n",
"data: {\"messageId\":\"msg-1\",\"message\":{\"id\":\"msg-1\",\"sessionId\":\"s-1\",\"role\":\"assistant\",\"content\":\"Final reply\",\"thinkingOutput\":null,\"metadata\":null,\"createdAt\":\"2026-01-01T00:00:00.000Z\"}}\n\n",
]),
{ status: 200 },
),
);
const donePayloads: Array<{ messageId: string; message?: { content: string } }> = [];
streamChatResponse("s-1", "hi", {
onDone: (data) => donePayloads.push(data),
onError: vi.fn(),
});
await vi.waitFor(() => {
expect(donePayloads).toEqual([{ messageId: "msg-1", message: { id: "msg-1", sessionId: "s-1", role: "assistant", content: "Final reply", thinkingOutput: null, metadata: null, createdAt: "2026-01-01T00:00:00.000Z" } }]);
});
});
it("handles done events that have no data payload", async () => { vi.spyOn(globalThis, "fetch").mockResolvedValue(
new Response(createChunkedStream(["event: done\n\n"]), { status: 200 }),
);
const donePayloads: Array<{ messageId: string }> = [];
streamChatResponse("s-1", "hi", {
onDone: (data) => donePayloads.push(data),
onError: vi.fn(),
});
await vi.waitFor(() => {
expect(donePayloads).toEqual([{ messageId: "" }]);
});
});
});