public async Task ListCardsAsync_Success() { CustomerRequest request = BuildCreateRequest(); Customer customer = await client.CreateAsync(request); await Task.Delay(1000); try { CustomerCardCreateRequest cardRequest = await BuildCardCreateRequestAsync(); CustomerCard createdCard = await client.CreateCardAsync(customer.Id, cardRequest); ResourcesList <CustomerCard> results = await client.ListCardsAsync(customer.Id); Assert.NotNull(results); Assert.Equal(createdCard.Id, results.First().Id); } finally { await client.DeleteAsync(customer.Id); } }