public void TryOrder_Unavailable_Returns_Empty()
{
// Execute
var maybeProduct = OrderBehavior.TryOrder(new Product {
AvailableUnits = 0
}, 1);
// Check
var result = maybeProduct.Match(p => p, null);
Assert.Null(result);
}
public async Task <IActionResult> Order(OrderCommand orderCommand)
{
return(await
// Try to generate an order
from maybeOrder in
from product in _repository.FindByIdAsync(orderCommand.ProductId)
select OrderBehavior.TryOrder(product, orderCommand.Quantity)
// Update the DB
from result in maybeOrder.AwaitSideEffect(_repository.UpdateAsync)
// Return results
select result.Match <IActionResult>(
Ok,
StatusCode(500, new { Error = "No available units." })));
}
public void TryOrder_Unavailable_Returns_Product()
{
// Prepare
var sourceProduct = new Product {
AvailableUnits = 1
};
// Execute
var maybeProduct = OrderBehavior.TryOrder(sourceProduct, 1);
// Check
var result = maybeProduct.Match(p => p, null);
Assert.NotNull(result);
Assert.NotEqual(sourceProduct, result);
Assert.Equal(0, result.AvailableUnits);
}