potential fix the problem fspes131

Frends.AmazonS3.ListObjectVersions/Frends.AmazonS3.ListObjectVersions.Tests/ErrorHandlerTest.cs

@@ -13,8 +13,8 @@ public class ErrorHandlerTest : TestBase
     [Test]
     public void Should_Throw_Error_When_ThrowErrorOnFailure_Is_True()
     {
-        var ex = Assert.ThrowsAsync<Exception>(() =>
-            AmazonS3.ListObjectVersions(DefaultInput(), DefaultConnection(), DefaultOptions(), CancellationToken.None));
+        var ex = Assert.ThrowsAsync<Exception>((Func<Task>)(() =>
+            AmazonS3.ListObjectVersions(DefaultInput(), DefaultConnection(), DefaultOptions(), CancellationToken.None)));
         Assert.That(ex, Is.Not.Null);
     }
 
@@ -33,8 +33,8 @@ public void Should_Use_Custom_ErrorMessageOnFailure()
     {
         var options = DefaultOptions();
         options.ErrorMessageOnFailure = CustomErrorMessage;
-        var ex = Assert.ThrowsAsync<Exception>(() =>
-            AmazonS3.ListObjectVersions(DefaultInput(), DefaultConnection(), options, CancellationToken.None));
+        var ex = Assert.ThrowsAsync<Exception>((Func<Task>)(() =>
+            AmazonS3.ListObjectVersions(DefaultInput(), DefaultConnection(), options, CancellationToken.None)));
         Assert.That(ex, Is.Not.Null);
         Assert.That(ex.Message, Contains.Substring(CustomErrorMessage));
     }

Frends.AmazonS3.ListObjects/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## [2.2.0] - 2026-06-16		
+### Changed
+- Updated AWSSDK.Core nuget package from 4.0.3.5 to 4.0.8
+- Updated AWSSDK.S3 nuget package from 4.0.14.2 to 4.0.24.1
+- Introduce more null checks to avoid unexpected exceptions
+
 ## [2.1.0] - 2025-12-29		
 ### Changed		  
 - Updated AWS SDK version.		

Frends.AmazonS3.ListObjects/Frends.AmazonS3.ListObjects.Test/UnitTests.cs

@@ -33,7 +33,7 @@ public class ListObjectsTest
 
         Connection? _connection = null;
         Input? _input = null;
-        Options? _options = null;
+        Options? _options;
 
         public ListObjectsTest()
         {

Frends.AmazonS3.ListObjects/Frends.AmazonS3.ListObjects/Definitions/BucketObject.cs

@@ -35,7 +35,7 @@ public class BucketObject
         /// The date and time the object was last modified.
         /// </summary>
         /// <example>2022-04-22T00:16:40+02:00</example>
-        public DateTime LastModified { get; set; }
+        public DateTime? LastModified { get; set; }
 
     }
 }

Frends.AmazonS3.ListObjects/Frends.AmazonS3.ListObjects/Frends.AmazonS3.ListObjects.csproj

@@ -2,7 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
-    <Version>2.1.0</Version>
+    <Version>2.2.0</Version>
     <Authors>Frends</Authors>
     <Copyright>Frends</Copyright>
     <Company>Frends</Company>
@@ -20,12 +20,12 @@
     </None>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="AWSSDK.Core" Version="4.0.3.5" />
-    <PackageReference Include="AWSSDK.S3" Version="4.0.14.2" />
+    <PackageReference Include="AWSSDK.Core" Version="4.0.8" />
+    <PackageReference Include="AWSSDK.S3" Version="4.0.24.1" />
     <PackageReference Include="dotenv.net" Version="4.0.0" />
   </ItemGroup>
   <ItemGroup>
     <Content Include="migration.json" PackagePath="/" Pack="true" />
     <Content Include="../CHANGELOG.md" PackagePath="/" Pack="true" />
   </ItemGroup>
-</Project>
+</Project>

Frends.AmazonS3.ListObjects/Frends.AmazonS3.ListObjects/ListObjects.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
 using System.Threading;
 using System.Threading.Tasks;
 using Amazon;
@@ -14,7 +15,7 @@ namespace Frends.AmazonS3.ListObjects
     /// <summary>
     /// Amazon S3 task.
     /// </summary>
-    public class AmazonS3
+    public static class AmazonS3
     {
         /// <summary>
         /// Lists objects from specified AWS S3 Bucket.
@@ -25,18 +26,26 @@ public class AmazonS3
         /// <param name="options">Options for the task</param>
         /// <param name="cancellationToken">Token to stop ListObjects. This is generated by Frends.</param>
         /// <returns>Result { List (BucketObject) Objects, bool Success, Error Error } where BucketObject contains { string BucketName, string Key, string Etag, long Size, DateTime LastModified }</returns>
-        public static async Task<Result> ListObjects([PropertyTab] Connection connection, [PropertyTab] Input input, [PropertyTab] Options options, CancellationToken cancellationToken)
+        public static async Task<Result> ListObjects([PropertyTab] Connection connection, [PropertyTab] Input input,
+            [PropertyTab] Options options, CancellationToken cancellationToken)
         {
             try
             {
-                if (string.IsNullOrWhiteSpace(connection.AwsSecretAccessKey) || string.IsNullOrWhiteSpace(connection.AwsAccessKeyId))
+                if (string.IsNullOrWhiteSpace(connection.AwsSecretAccessKey) ||
+                    string.IsNullOrWhiteSpace(connection.AwsAccessKeyId))
                 {
                     return ErrorHandler.HandleCredentialsError("AWS credentials missing.", options);
                 }
 
+                if (string.IsNullOrWhiteSpace(input.BucketName))
+                {
+                    return ErrorHandler.HandleCredentialsError("Bucket name is missing.", options);
+                }
+
                 var region = RegionSelection(connection.Region);
                 var client = new AmazonS3Client(connection.AwsAccessKeyId, connection.AwsSecretAccessKey, region);
                 var response = await ListBucketContentsAsync(client, input, options, cancellationToken);
+
                 return new Result(response);
             }
             catch (Exception ex)
@@ -53,7 +62,8 @@ public static async Task<Result> ListObjects([PropertyTab] Connection connection
         /// <param name="options">Options for filtering and limiting results</param>
         /// <param name="cancellationToken">Token to cancel the operation</param>
         /// <returns>A list of BucketObject instances representing the objects in the bucket</returns>
-        private static async Task<List<BucketObject>> ListBucketContentsAsync(AmazonS3Client client, Input input, Options options, CancellationToken cancellationToken)
+        private static async Task<List<BucketObject>> ListBucketContentsAsync(AmazonS3Client client, Input input,
+            Options options, CancellationToken cancellationToken)
         {
             var data = new List<BucketObject>();
             var request = GetListObjectsV2Request(input, options);
@@ -62,25 +72,40 @@ private static async Task<List<BucketObject>> ListBucketContentsAsync(AmazonS3Cl
             {
                 var response = await client.ListObjectsV2Async(request, cancellationToken);
 
+                if (response is null)
+                    throw new Exception("Received null response from S3 ListObjectsV2Async call.");
+
+                if (response.HttpStatusCode != System.Net.HttpStatusCode.OK)
+                {
+                    throw new Exception($"Error listing objects: {response.HttpStatusCode}");
+                }
+
+                if (response.S3Objects is null)
+                {
+                    throw new Exception("S3Objects property was null in S3 ListObjectsV2Async response.");
+                }
+
                 foreach (var item in response.S3Objects)
                 {
                     cancellationToken.ThrowIfCancellationRequested();
                     data.Add(new BucketObject
                     {
                         BucketName = item.BucketName,
                         Key = item.Key,
-                        Size = (long)item.Size,
+                        Size = item.Size ?? 0,
                         Etag = item.ETag,
-                        LastModified = (DateTime)item.LastModified
+                        LastModified = item.LastModified,
                     });
                 }
 
+                if (response.IsTruncated is null)
+                    throw new Exception("IsTruncated flag was not set in S3 ListObjectsV2Async response.");
+
                 if ((bool)response.IsTruncated)
                     request.ContinuationToken = response.NextContinuationToken;
                 else
                     break;
-            }
-            while (true);
+            } while (true);
 
             return data;
         }
@@ -112,6 +137,7 @@ private static ListObjectsV2Request GetListObjectsV2Request(Input input, Options
         /// </summary>
         /// <param name="region">The region enum value to convert</param>
         /// <returns>The corresponding AWS RegionEndpoint instance</returns>
+        [ExcludeFromCodeCoverage]
         private static RegionEndpoint RegionSelection(Region region)
         {
             switch (region)