Fixing ToUnixTime tests not using DateTimeKind.Utc (#1475)

* Fixing ToUnixTime tests not using DateTimeKind.Utc

* Fixing incorrect log in SIPTransactionEngine

Author: georgehazboun

src/core/SIPTransactions/SIPTransactionEngine.cs

@@ -427,7 +427,7 @@ private void ProcessPendingTransactions()
                                                         break;
 
                                                     default:
-                                                        logger.LogWarning("InviteServer Transaction entered an unexpected transaction state {TransactionState}.", transaction.TransactionState);
+                                                        logger.LogWarning("InviteClient Transaction entered an unexpected transaction state {TransactionState}.", transaction.TransactionState);
                                                         transaction.DeliveryFailed = true;
                                                         break;
                                                 }

test/unit/sys/TypeExtensionsUnitTest.cs

@@ -74,7 +74,7 @@ public void ToUnixTimeTest()
             logger.LogDebug("--> {MethodName}", System.Reflection.MethodBase.GetCurrentMethod().Name);
             logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name);
 
-            var dateTime = new DateTime(2025, 2, 12, 23, 39, 0);
+            var dateTime = new DateTime(2025, 2, 12, 23, 39, 0, DateTimeKind.Utc);
             var unixTime = dateTime.ToUnixTime();
 
             logger.LogDebug("Unix time: {unixTime}.", unixTime);
@@ -88,7 +88,7 @@ public void ToUnixTimeAfter2038Test()
             logger.LogDebug("--> {MethodName}", System.Reflection.MethodBase.GetCurrentMethod().Name);
             logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name);
 
-            var dateTime = new DateTime(2060, 2, 13, 22, 54, 54);
+            var dateTime = new DateTime(2060, 2, 13, 22, 54, 54, DateTimeKind.Utc);
             var unixTime = dateTime.ToUnixTime();
 
             logger.LogDebug("Unix time: {unixTime}.", unixTime);