release: WRNexusJS 0.8.0

packages/realtime/test/history.test.ts

@@ -0,0 +1,48 @@
+import { describe, expect, test } from "bun:test";
+import {
+  createAcknowledgement,
+  createRealtimeHistory,
+  createRealtimeMessage,
+  realtimeSseResponse,
+} from "../src/index.ts";
+
+describe("realtime replay and acknowledgements", () => {
+  test("bounds room history and resumes after a client acknowledgement", () => {
+    const history = createRealtimeHistory({ limitPerRoom: 2 });
+    const entries = [1, 2, 3].map((value) =>
+      history.publish(
+        "chat",
+        createRealtimeMessage({ type: "message", room: "chat", data: { value } }),
+      ),
+    );
+    expect(history.replay("chat").map((entry) => entry.message.data)).toEqual([
+      { value: 2 },
+      { value: 3 },
+    ]);
+    history.acknowledge("chat", "client-1", entries[1]!.sequence);
+    expect(history.resume("chat", "client-1")).toHaveLength(1);
+    expect(history.snapshot()).toMatchObject({ rooms: 1, messages: 2, acknowledgements: 1 });
+  });
+  test("acknowledgements are monotonic and reject impossible values", () => {
+    const history = createRealtimeHistory();
+    const entry = history.publish("chat", createRealtimeMessage({ type: "message", data: {} }));
+    history.acknowledge("chat", "client", entry.sequence);
+    history.acknowledge("chat", "client", 0);
+    expect(history.acknowledged("chat", "client")).toBe(entry.sequence);
+    expect(() => history.acknowledge("chat", "client", entry.sequence + 1)).toThrow();
+    expect(createAcknowledgement("chat", entry.sequence, "client").type).toBe("ack");
+  });
+  test("encodes sequenced events as SSE", async () => {
+    const message = createRealtimeMessage({ type: "notice", room: "chat", data: { ok: true } });
+    const response = realtimeSseResponse(
+      new ReadableStream({
+        start(controller) {
+          controller.enqueue({ sequence: 7, message });
+          controller.close();
+        },
+      }),
+    );
+    expect(response.headers.get("content-type")).toContain("text/event-stream");
+    expect(await response.text()).toContain("id: 7\nevent: notice\ndata:");
+  });
+});