fix: enforce Nextcloud Talk allowlist by user id

extensions/nextcloud-talk/src/policy.test.ts

@@ -0,0 +1,34 @@
+import { describe, expect, it } from "vitest";
+
+import { resolveNextcloudTalkAllowlistMatch } from "./policy.js";
+
+describe("nextcloud-talk policy", () => {
+  describe("resolveNextcloudTalkAllowlistMatch", () => {
+    it("allows wildcard", () => {
+      expect(
+        resolveNextcloudTalkAllowlistMatch({
+          allowFrom: ["*"],
+          senderId: "user-id",
+        }).allowed,
+      ).toBe(true);
+    });
+
+    it("allows sender id match with normalization", () => {
+      expect(
+        resolveNextcloudTalkAllowlistMatch({
+          allowFrom: ["nc:User-Id"],
+          senderId: "user-id",
+        }),
+      ).toEqual({ allowed: true, matchKey: "user-id", matchSource: "id" });
+    });
+
+    it("blocks when sender id does not match", () => {
+      expect(
+        resolveNextcloudTalkAllowlistMatch({
+          allowFrom: ["allowed"],
+          senderId: "other",
+        }).allowed,
+      ).toBe(false);
+    });
+  });
+});