feat(core-realtime): channel-template matcher (placeholder extraction)

packages/core-realtime/src/channel-template.test.ts

@@ -0,0 +1,33 @@
+import { describe, it, expect } from "vitest";
+import { matchChannelTemplate } from "@/channel-template";
+
+describe("matchChannelTemplate", () => {
+  it("matches a plain channel name exactly", () => {
+    expect(matchChannelTemplate("blog.feed", "blog.feed")).toEqual({ params: {} });
+    expect(matchChannelTemplate("blog.feed", "blog.other")).toBeNull();
+  });
+
+  it("matches a templated channel and extracts params", () => {
+    expect(
+      matchChannelTemplate("notifications.user.{userId}", "notifications.user.user_42"),
+    ).toEqual({ params: { userId: "user_42" } });
+  });
+
+  it("returns null when a templated channel doesn't match the shape", () => {
+    expect(
+      matchChannelTemplate("notifications.user.{userId}", "notifications.user"),
+    ).toBeNull();
+    expect(
+      matchChannelTemplate("notifications.user.{userId}", "blog.feed"),
+    ).toBeNull();
+  });
+
+  it("supports multiple placeholders", () => {
+    expect(
+      matchChannelTemplate(
+        "rooms.{roomId}.user.{userId}",
+        "rooms.r1.user.u1",
+      ),
+    ).toEqual({ params: { roomId: "r1", userId: "u1" } });
+  });
+});