message: fix /trackingcategories for my app
diff: @@ -35,7 +35,7 @@ describe('/trackingcategories', () => {
  const response = await xero.trackingCategories.get();
  expect(response).toBeDefined();
  expect(response.Id).toBeTruthy();
  - expect(response.TrackingCategories.length).toBe(1);
  + expect(response.TrackingCategories.length).toBeGreaterThan(0);
  expect(response.TrackingCategories[0].TrackingCategoryID).toBeTruthy();
  });
  