🤖 codex: handle discord gateway error events (#504)

src/discord/monitor.gateway.test.ts

@@ -0,0 +1,49 @@
+import { EventEmitter } from "node:events";
+
+import { describe, expect, it, vi } from "vitest";
+
+import { waitForDiscordGatewayStop } from "./monitor.js";
+
+describe("waitForDiscordGatewayStop", () => {
+  it("resolves on abort and disconnects gateway", async () => {
+    const emitter = new EventEmitter();
+    const disconnect = vi.fn();
+    const abort = new AbortController();
+
+    const promise = waitForDiscordGatewayStop({
+      gateway: { emitter, disconnect },
+      abortSignal: abort.signal,
+    });
+
+    expect(emitter.listenerCount("error")).toBe(1);
+    abort.abort();
+
+    await expect(promise).resolves.toBeUndefined();
+    expect(disconnect).toHaveBeenCalledTimes(1);
+    expect(emitter.listenerCount("error")).toBe(0);
+  });
+
+  it("rejects on gateway error and disconnects", async () => {
+    const emitter = new EventEmitter();
+    const disconnect = vi.fn();
+    const onGatewayError = vi.fn();
+    const abort = new AbortController();
+    const err = new Error("boom");
+
+    const promise = waitForDiscordGatewayStop({
+      gateway: { emitter, disconnect },
+      abortSignal: abort.signal,
+      onGatewayError,
+    });
+
+    emitter.emit("error", err);
+
+    await expect(promise).rejects.toThrow("boom");
+    expect(onGatewayError).toHaveBeenCalledWith(err);
+    expect(disconnect).toHaveBeenCalledTimes(1);
+    expect(emitter.listenerCount("error")).toBe(0);
+
+    abort.abort();
+    expect(disconnect).toHaveBeenCalledTimes(1);
+  });
+});