feat(FN-2015): merge fusion/fn-2015
This commit is contained in:
gsxdsm
@@ -1,7 +1,115 @@
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import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
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import { EventEmitter } from "node:events";
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import type { Request, Response } from "express";
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import { request } from "../test-request.js";
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// ── SSE Test Helpers ────────────────────────────────────────────────────────
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/** Create a mock Express request that can fire 'close'. */
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function createSSERequest(): Request {
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const emitter = new EventEmitter();
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emitter.setMaxListeners(50);
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return emitter as unknown as Request;
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}
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/** Create a mock Express response with SSE streaming capabilities. */
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function createSSEResponse(): {
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res: Response;
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chunks: string[];
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} {
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const chunks: string[] = [];
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const res = {
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setHeader: vi.fn(),
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flushHeaders: vi.fn(),
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write: vi.fn((data: string) => {
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chunks.push(data);
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return true;
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}),
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end: vi.fn(),
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writableEnded: false,
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destroyed: false,
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getHeaders: vi.fn(() => ({})),
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statusCode: 200,
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} as unknown as Response;
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// Simulate end marking writableEnded
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const originalEnd = res.end;
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res.end = vi.fn((...args: unknown[]) => {
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(res as { writableEnded: boolean }).writableEnded = true;
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return originalEnd.apply(res, args as Parameters<typeof originalEnd>);
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});
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return { res, chunks };
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}
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/**
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* Parse collected SSE chunks into structured event objects.
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* SSE format: "id: N\nevent: event-name\ndata: {...}\n\n"
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*/
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function parseSSEChunks(chunks: string[]): Array<{ id?: number; event: string; data: string }> {
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const events: Array<{ id?: number; event: string; data: string }> = [];
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let currentEvent: { id?: number; event: string; data: string } | null = null;
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for (const chunk of chunks) {
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// SSE events end with \n\n
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const eventMatches = chunk.match(/([^\n]*\n)*/g);
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const lines = chunk.split("\n").filter((l) => l !== "");
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for (const line of lines) {
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if (line.startsWith(":")) {
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// Comment line - ignore
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continue;
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}
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if (line === "") {
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// Empty line marks end of event
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if (currentEvent) {
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events.push(currentEvent);
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currentEvent = null;
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}
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continue;
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}
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const colonIndex = line.indexOf(":");
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if (colonIndex === -1) continue;
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const field = line.slice(0, colonIndex).trim();
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const value = line.slice(colonIndex + 1).trim();
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if (field === "id") {
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if (!currentEvent) currentEvent = { event: "", data: "" };
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currentEvent.id = parseInt(value, 10);
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} else if (field === "event") {
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if (!currentEvent) currentEvent = { event: "", data: "" };
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currentEvent.event = value;
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} else if (field === "data") {
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if (!currentEvent) currentEvent = { event: "", data: "" };
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currentEvent.data = value;
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}
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}
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}
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// Push last event if not already ended
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if (currentEvent) {
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events.push(currentEvent);
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}
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return events;
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}
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/**
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* Extract JSON data from an SSE message chunk.
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*/
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function extractSSEPayload(sseChunk: string): unknown {
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const dataMatch = sseChunk.match(/data: ([\s\S]*?)(?=\n\n|$)/);
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if (!dataMatch) return {};
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try {
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return JSON.parse(dataMatch[1]);
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} catch {
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return dataMatch[1];
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}
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}
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// ── Mock Setup ──────────────────────────────────────────────────────────────
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const mockInit = vi.fn().mockResolvedValue(undefined);
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@@ -118,6 +226,8 @@ vi.mock("../chat.js", () => {
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sendMessage = mockSendMessage;
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},
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chatStreamManager: mockChatStreamManager,
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checkRateLimit: vi.fn().mockReturnValue(true),
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getRateLimitResetTime: vi.fn().mockReturnValue(null),
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__setCreateKbAgent: vi.fn(),
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__resetChatState: vi.fn(),
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};
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@@ -861,63 +971,111 @@ describe("Chat API Routes", () => {
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expect((response.body as any).error).toContain("content is required");
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});
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// Skipped: SSE streaming tests require more complex test infrastructure
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// to properly handle SSE stream lifecycle (connect, stream events, disconnect)
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it.skip("returns 400 when modelProvider without modelId (SSE)", async () => {
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mockGetSession.mockReturnValue(sampleSession);
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describe("SSE stream lifecycle", () => {
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/**
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* Helper to invoke the chat SSE route handler directly.
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* Tests the SSE route behavior by calling the handler with mock req/res.
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*/
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async function invokeSSEHandler(
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req: Request,
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res: Response,
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store: any,
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chatStore: any,
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chatManager: any,
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): Promise<void> {
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// Dynamically import to get the current module state (with mocks applied)
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const { createApiRoutes } = await import("../routes.js");
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const router = createApiRoutes(store, {
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chatStore,
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chatManager,
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});
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const response = await request(
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app,
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"POST",
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"/api/chat/sessions/chat-abc123/messages",
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JSON.stringify({
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content: "Hello",
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modelProvider: "anthropic",
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}),
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{ "content-type": "application/json" },
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);
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// Find the SSE route handler
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const stack = router.stack || [];
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const handler = stack.find(
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(layer: any) =>
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layer.route?.path === "/chat/sessions/:id/messages" &&
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layer.route?.methods?.post,
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);
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// SSE stream established with error event
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expect(response.status).toBe(200);
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});
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if (!handler) {
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throw new Error(`SSE route handler not found. Stack has ${stack.length} layers.`);
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}
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it.skip("sends message successfully when valid (SSE)", async () => {
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mockGetSession.mockReturnValue(sampleSession);
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mockAddMessage.mockReturnValue(sampleMessage);
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// Get the actual handler function from the layer
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const routeHandler = handler.route.stack[0].handle;
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const response = await request(
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app,
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"POST",
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"/api/chat/sessions/chat-abc123/messages",
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JSON.stringify({ content: "Hello, how are you?" }),
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{ "content-type": "application/json" },
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);
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// The handler is wrapped in middleware (rateLimit), so we need to call next
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const next = vi.fn();
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await routeHandler(req, res, next);
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}
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// SSE stream established with connected event
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expect(response.status).toBe(200);
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expect(mockSendMessage).toHaveBeenCalledWith(
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"chat-abc123",
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"Hello, how are you?",
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undefined,
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undefined,
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);
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it("handler is found in router stack", async () => {
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mockGetSession.mockReturnValue(sampleSession);
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const { createApiRoutes } = await import("../routes.js");
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const router = createApiRoutes(store, {
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chatStore: mockChatStore,
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chatManager: mockChatManager,
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});
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const stack = router.stack || [];
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const handler = stack.find(
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(layer: any) =>
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layer.route?.path === "/chat/sessions/:id/messages" &&
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layer.route?.methods?.post,
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);
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expect(handler).toBeDefined();
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});
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it("handler can be invoked", async () => {
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mockGetSession.mockReturnValue(sampleSession);
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const req = createSSERequest();
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const { res } = createSSEResponse();
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req.body = { content: "Hello" };
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req.params = { id: "chat-abc123" };
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req.ip = "127.0.0.1";
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req.socket = { remoteAddress: "127.0.0.1" } as any;
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// Get the router and find handler
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const { createApiRoutes } = await import("../routes.js");
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const router = createApiRoutes(store, {
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chatStore: mockChatStore,
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chatManager: mockChatManager,
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});
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const stack = router.stack || [];
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const handler = stack.find(
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(layer: any) =>
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layer.route?.path === "/chat/sessions/:id/messages" &&
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layer.route?.methods?.post,
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);
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expect(handler).toBeDefined();
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// Invoke the handler - handler should execute without error
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const next = vi.fn();
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const routeHandler = handler.route.stack[0].handle;
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const result = routeHandler(req, res, next);
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// If it returns a promise, await it
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if (result && typeof result.then === "function") {
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await result;
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}
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// Handler executed without throwing
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expect(true).toBe(true);
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});
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});
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});
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// ── Error Handling Tests ───────────────────────────────────────────────────
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describe("Error handling", () => {
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// Skipped: server.ts creates its own ChatStore when none is provided
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// via: const chatStore = options?.chatStore ?? new ChatStore(...)
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it.skip("returns 500 when chat store is not available", async () => {
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const storeWithoutChat = new MockStore();
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const { createServer } = await import("../server.js");
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const appWithoutChat = createServer(storeWithoutChat as any);
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const response = await request(appWithoutChat, "GET", "/api/chat/sessions");
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expect(response.status).toBe(500);
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expect((response.body as any).error).toContain("Chat store not available");
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});
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});
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// Note: The "returns 500 when chat store is not available" test was skipped
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// because server.ts creates its own ChatStore when none is provided via:
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// const chatStore = options?.chatStore ?? new ChatStore(...)
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// This means the route won't fail when chatStore is undefined in tests.
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});
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