Discord: add presence cache tests (#2266) (thanks @kentaro)

src/discord/monitor/presence-cache.test.ts

@@ -0,0 +1,39 @@
+import { beforeEach, describe, expect, it } from "vitest";
+import type { GatewayPresenceUpdate } from "discord-api-types/v10";
+import {
+  clearPresences,
+  getPresence,
+  presenceCacheSize,
+  setPresence,
+} from "./presence-cache.js";
+
+describe("presence-cache", () => {
+  beforeEach(() => {
+    clearPresences();
+  });
+
+  it("scopes presence entries by account", () => {
+    const presenceA = { status: "online" } as GatewayPresenceUpdate;
+    const presenceB = { status: "idle" } as GatewayPresenceUpdate;
+
+    setPresence("account-a", "user-1", presenceA);
+    setPresence("account-b", "user-1", presenceB);
+
+    expect(getPresence("account-a", "user-1")).toBe(presenceA);
+    expect(getPresence("account-b", "user-1")).toBe(presenceB);
+    expect(getPresence("account-a", "user-2")).toBeUndefined();
+  });
+
+  it("clears presence per account", () => {
+    const presence = { status: "dnd" } as GatewayPresenceUpdate;
+
+    setPresence("account-a", "user-1", presence);
+    setPresence("account-b", "user-2", presence);
+
+    clearPresences("account-a");
+
+    expect(getPresence("account-a", "user-1")).toBeUndefined();
+    expect(getPresence("account-b", "user-2")).toBe(presence);
+    expect(presenceCacheSize()).toBe(1);
+  });
+});