public async Task CreateSkuTest() { // Arrange var args = new SkuCreateArguments(); _stripe.Post(Arg.Is <StripeRequest <SkuCreateArguments, Sku> >(a => a.UrlPath == "skus" && a.Model == args), _cancellationToken).Returns(Task.FromResult(new StripeResponse <Sku>())); // Act var response = await _client.CreateSku(args, _cancellationToken); // Assert response.Should().NotBeNull(); }