Discord: harden gateway resilience

src/discord/monitor.gateway.test.ts

@@ -47,6 +47,31 @@ describe("waitForDiscordGatewayStop", () => {
     expect(disconnect).toHaveBeenCalledTimes(1);
   });
 
+  it("ignores gateway errors when instructed", async () => {
+    const emitter = new EventEmitter();
+    const disconnect = vi.fn();
+    const onGatewayError = vi.fn();
+    const abort = new AbortController();
+    const err = new Error("transient");
+
+    const promise = waitForDiscordGatewayStop({
+      gateway: { emitter, disconnect },
+      abortSignal: abort.signal,
+      onGatewayError,
+      shouldStopOnError: () => false,
+    });
+
+    emitter.emit("error", err);
+    expect(onGatewayError).toHaveBeenCalledWith(err);
+    expect(disconnect).toHaveBeenCalledTimes(0);
+    expect(emitter.listenerCount("error")).toBe(1);
+
+    abort.abort();
+    await expect(promise).resolves.toBeUndefined();
+    expect(disconnect).toHaveBeenCalledTimes(1);
+    expect(emitter.listenerCount("error")).toBe(0);
+  });
+
   it("resolves on abort without a gateway", async () => {
     const abort = new AbortController();