refactor(new merge) (#369)

Co-authored-by: paisley <8197966+su8su@users.noreply.github.com>
Co-authored-by: zuolingxuan <zuolingxuan@bytedance.com>

tests/unit/usage-routes.test.ts

@@ -0,0 +1,53 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import type { IncomingMessage, ServerResponse } from 'http';
+
+const getRecentTokenUsageHistoryMock = vi.fn();
+const sendJsonMock = vi.fn();
+
+vi.mock('@electron/utils/token-usage', () => ({
+  getRecentTokenUsageHistory: (...args: unknown[]) => getRecentTokenUsageHistoryMock(...args),
+}));
+
+vi.mock('@electron/api/route-utils', () => ({
+  sendJson: (...args: unknown[]) => sendJsonMock(...args),
+}));
+
+describe('handleUsageRoutes', () => {
+  beforeEach(() => {
+    vi.resetAllMocks();
+  });
+
+  it('passes undefined limit when query param is missing', async () => {
+    getRecentTokenUsageHistoryMock.mockResolvedValueOnce([{ totalTokens: 1 }]);
+    const { handleUsageRoutes } = await import('@electron/api/routes/usage');
+
+    const handled = await handleUsageRoutes(
+      { method: 'GET' } as IncomingMessage,
+      {} as ServerResponse,
+      new URL('http://127.0.0.1:3210/api/usage/recent-token-history'),
+      {} as never,
+    );
+
+    expect(handled).toBe(true);
+    expect(getRecentTokenUsageHistoryMock).toHaveBeenCalledWith(undefined);
+    expect(sendJsonMock).toHaveBeenCalledWith(
+      expect.anything(),
+      200,
+      [{ totalTokens: 1 }],
+    );
+  });
+
+  it('passes sanitized numeric limit when provided', async () => {
+    getRecentTokenUsageHistoryMock.mockResolvedValueOnce([]);
+    const { handleUsageRoutes } = await import('@electron/api/routes/usage');
+
+    await handleUsageRoutes(
+      { method: 'GET' } as IncomingMessage,
+      {} as ServerResponse,
+      new URL('http://127.0.0.1:3210/api/usage/recent-token-history?limit=50.9'),
+      {} as never,
+    );
+
+    expect(getRecentTokenUsageHistoryMock).toHaveBeenCalledWith(50);
+  });
+});