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packages/plugins/atproto/tests/atproto.test.ts

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+import { describe, it, expect } from "vitest";
+
+import { rkeyFromUri } from "../src/atproto.js";
+
+describe("rkeyFromUri", () => {
+	it("extracts rkey from a standard AT-URI", () => {
+		const rkey = rkeyFromUri("at://did:plc:abc123/site.standard.document/3lwafzkjqm25s");
+		expect(rkey).toBe("3lwafzkjqm25s");
+	});
+
+	it("extracts rkey from a Bluesky post URI", () => {
+		const rkey = rkeyFromUri("at://did:plc:abc123/app.bsky.feed.post/3k4duaz5vfs2b");
+		expect(rkey).toBe("3k4duaz5vfs2b");
+	});
+
+	it("throws on empty URI", () => {
+		expect(() => rkeyFromUri("")).toThrow("Invalid AT-URI");
+	});
+});