public async Task ReturnNull_When_NotCreated()
{
const string expectedError = "error";
_orderService
.Setup(o => o.Add(It.IsAny <List <Product> >()))
.ReturnsAsync(new Entity <Order>(default(Order), expectedError));
var response =
await _createOrderHandler.Create(new CreateOrderRequest(new List <CreateOrderProductsRequest>()));
Assert.Multiple(() =>
{
Assert.IsNull(response.Value);
Assert.AreEqual(expectedError, response.Error);
});
}
