test(ai): cover Cursor usage registration

packages/ai/test/cursor-usage.test.ts

@@ -1,4 +1,5 @@
 import { describe, expect, it } from "bun:test";
+import { type AuthCredentialStore, AuthStorage } from "../src/auth-storage";
 import type { UsageFetchContext, UsageFetchParams } from "../src/usage";
 import { cursorUsageProvider, parseCursorUsage } from "../src/usage/cursor";
 
@@ -136,6 +137,41 @@ describe("cursor usage provider", () => {
 		});
 	});
 
+	describe("default registration", () => {
+		it("registers Cursor in AuthStorage's default usage resolver", async () => {
+			const store: AuthCredentialStore = {
+				close() {},
+				listAuthCredentials() {
+					return [];
+				},
+				updateAuthCredential() {},
+				deleteAuthCredential() {},
+				tryDisableAuthCredentialIfMatches() {
+					return false;
+				},
+				replaceAuthCredentialsForProvider() {
+					return [];
+				},
+				upsertAuthCredentialForProvider() {
+					return [];
+				},
+				deleteAuthCredentialsForProvider() {},
+				getCache() {
+					return null;
+				},
+				setCache() {},
+				cleanExpiredCache() {},
+			};
+			const storage = new AuthStorage(store);
+			await storage.reload();
+			try {
+				expect(storage.usageProviderFor("cursor")).toBe(cursorUsageProvider);
+			} finally {
+				storage.close();
+			}
+		});
+	});
+
 	describe("cursorUsageProvider", () => {
 		it("supports oauth credentials", () => {
 			const params: UsageFetchParams = {