fix: verify stored sessions from a Reddit page

tests/browser-client.test.ts

@@ -42,7 +42,11 @@ describe('BrowserClient', () => {
       json: async () => ({ kind: 't2', data: { name: 'bot-account', id: 'abc123' } }),
     });
     vi.stubGlobal('fetch', fetchMock);
+    let pageUrl = 'about:blank';
+    const goto = vi.fn(async (url: string) => { pageUrl = url; });
     const page = {
+      url: () => pageUrl,
+      goto,
       evaluate: async (pageFunction: () => Promise<string | null>) => pageFunction(),
     } as unknown as Page;
     const context = { pages: () => [page] } as unknown as BrowserContext;
@@ -54,6 +58,11 @@ describe('BrowserClient', () => {
       username: 'bot-account',
       accountId: 't2_abc123',
     });
+    expect(goto).toHaveBeenCalledTimes(1);
+    expect(goto).toHaveBeenCalledWith('https://www.reddit.com', {
+      waitUntil: 'domcontentloaded',
+      timeout: 30000,
+    });
     expect(fetchMock).toHaveBeenCalledWith(
       'https://www.reddit.com/api/me.json',
       { credentials: 'include' },