Add test for default currency of PaymentRequestAppService

modules/payment/src/Payment.Domain/PaymentOptions.cs

@@ -2,6 +2,6 @@
 {
     public class PaymentOptions
     {
-        public string DefaultCurrency { get; set; }
+        public string DefaultCurrency { get; set; } = "USD"
     }
 }

modules/payment/test/Payment.Application.Tests/PaymentRequests/PaymentRequestAppService_Tests.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Threading.Tasks;
+using Microsoft.Extensions.Options;
 using Shouldly;
 using Xunit;
 
@@ -24,10 +25,24 @@ namespace Payment.PaymentRequests
                     Price = 99.99m
                 }
             );
-            
+
             result.Id.ShouldNotBe(Guid.Empty);
             result.Price.ShouldBe(99.99m);
             result.ProductName.ShouldBe("My product 1");
         }
+
+        [Fact]
+        public async Task Should_Create_Payment_Request_With_Default_Currency()
+        {
+            var result = await _paymentRequestAppService.CreateAsync(new PaymentRequestCreationDto
+            {
+                Price = 4.95m,
+                ProductName = "Donation"
+            });
+
+            var options = GetRequiredService<IOptions<PaymentOptions>>();
+
+            result.Currency.ShouldBe(options.Value.DefaultCurrency);
+        }
     }
 }