Add constructor to DlocalSignature and integrate it into ForwardIntegrationTest

Author: armando-rodriguez-cko

src/CheckoutSdk/Forward/Requests/Signatures/DlocalSignature.cs

@@ -1,7 +1,10 @@
 namespace Checkout.Forward.Requests.Signatures
 {
-    public class DlocalSignature
+    public class DlocalSignature : AbstractSignature
     {
+        /// <summary> Initializes a new instance of the DlocalSignature class. </summary>
+        public DlocalSignature() : base(SignatureType.Dlocal) { }
+        
         /// <summary>
         ///     The parameters required to generate an HMAC signature for the dLocal API. See their documentation for
         ///     details.

test/CheckoutSdkTest/Forward/ForwardIntegrationTest.cs

@@ -1,4 +1,5 @@
 using Checkout.Forward.Requests;
+using Checkout.Forward.Requests.Signatures;
 using Checkout.Forward.Requests.Sources;
 using Shouldly;
 using System.Collections.Generic;
@@ -67,7 +68,14 @@ private ForwardRequest CreateForwardRequest()
                                 }
                         },
                     Body =
-                        "{\"amount\": 1000, \"currency\": \"USD\", \"reference\": \"some_reference\", \"source\": {\"type\": \"card\", \"number\": \"{{card_number}}\", \"expiry_month\": \"{{card_expiry_month}}\", \"expiry_year\": \"{{card_expiry_year_yyyy}}\", \"name\": \"Ali Farid\"}, \"payment_type\": \"Regular\", \"authorization_type\": \"Final\", \"capture\": true, \"processing_channel_id\": \"pc_xxxxxxxxxxx\", \"risk\": {\"enabled\": false}, \"merchant_initiated\": true}"
+                        "{\"amount\": 1000, \"currency\": \"USD\", \"reference\": \"some_reference\", \"source\": {\"type\": \"card\", \"number\": \"{{card_number}}\", \"expiry_month\": \"{{card_expiry_month}}\", \"expiry_year\": \"{{card_expiry_year_yyyy}}\", \"name\": \"Ali Farid\"}, \"payment_type\": \"Regular\", \"authorization_type\": \"Final\", \"capture\": true, \"processing_channel_id\": \"pc_xxxxxxxxxxx\", \"risk\": {\"enabled\": false}, \"merchant_initiated\": true}",
+                    Signature = new DlocalSignature
+                    {
+                        DlocalParameters = new DlocalParameters
+                        {
+                            SecretKey = "9f439fe1a9f96e67b047d3c1a28c33a2e"
+                        }
+                    }
                 }
             };
         }