Enable unit tests to build and pass on .NET Framework

dotnet/Directory.Packages.props

@@ -34,7 +34,7 @@
     <PackageVersion Include="System.Linq.Async" Version="6.0.1" />
     <PackageVersion Include="System.Memory.Data" Version="8.0.0" />
     <PackageVersion Include="System.Numerics.Tensors" Version="8.0.0" />
-    <PackageVersion Include="System.Text.Json" Version="8.0.2" />
+    <PackageVersion Include="System.Text.Json" Version="8.0.3" />
     <PackageVersion Include="System.Threading.Tasks.Extensions" Version="4.5.4" />
     <PackageVersion Include="System.ValueTuple" Version="4.5.0" />
     <!-- Tokenizers -->

dotnet/src/Connectors/Connectors.AzureAISearch.UnitTests/Connectors.AzureAISearch.UnitTests.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <AssemblyName>SemanticKernel.Connectors.AzureAISearch.UnitTests</AssemblyName>
     <RootNamespace>SemanticKernel.Connectors.AzureAISearch.UnitTests</RootNamespace>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;net462</TargetFrameworks>
     <IsTestProject>true</IsTestProject>
     <Nullable>enable</Nullable>
     <ImplicitUsings>disable</ImplicitUsings>

dotnet/src/Connectors/Connectors.Google.UnitTests/Connectors.Google.UnitTests.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <AssemblyName>SemanticKernel.Connectors.GoogleVertexAI.UnitTests</AssemblyName>
     <RootNamespace>SemanticKernel.Connectors.GoogleVertexAI.UnitTests</RootNamespace>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;net462</TargetFrameworks>
     <IsTestProject>true</IsTestProject>
     <Nullable>enable</Nullable>
     <ImplicitUsings>disable</ImplicitUsings>

dotnet/src/Connectors/Connectors.Google.UnitTests/Core/Gemini/AuthorRoleConverterTests.cs

@@ -2,6 +2,7 @@
 
 using System;
 using System.Buffers;
+using System.IO;
 using System.Text.Json;
 using Microsoft.SemanticKernel.ChatCompletion;
 using Microsoft.SemanticKernel.Connectors.Google.Core;
@@ -94,67 +95,72 @@ public void WriteWhenRoleIsUserReturnsUser()
     {
         // Arrange
         var converter = new AuthorRoleConverter();
-        var bufferWriter = new ArrayBufferWriter<byte>();
-        using var writer = new Utf8JsonWriter(bufferWriter);
+        var stream = new MemoryStream();
+        using var writer = new Utf8JsonWriter(stream);
 
         // Act
         converter.Write(writer, AuthorRole.User, JsonSerializerOptions.Default);
+        writer.Flush();
 
         // Assert
-        Assert.Equal("\"user\""u8, bufferWriter.GetSpan().Trim((byte)'\0'));
+        Assert.Equal("\"user\""u8.ToArray(), stream.ToArray());
     }
 
     [Fact]
     public void WriteWhenRoleIsAssistantReturnsModel()
     {
         // Arrange
         var converter = new AuthorRoleConverter();
-        var bufferWriter = new ArrayBufferWriter<byte>();
-        using var writer = new Utf8JsonWriter(bufferWriter);
+        var stream = new MemoryStream();
+        using var writer = new Utf8JsonWriter(stream);
 
         // Act
         converter.Write(writer, AuthorRole.Assistant, JsonSerializerOptions.Default);
+        writer.Flush();
 
         // Assert
-        Assert.Equal("\"model\""u8, bufferWriter.GetSpan().Trim((byte)'\0'));
+        Assert.Equal("\"model\""u8.ToArray(), stream.ToArray());
     }
 
     [Fact]
     public void WriteWhenRoleIsToolReturnsFunction()
     {
         // Arrange
         var converter = new AuthorRoleConverter();
-        var bufferWriter = new ArrayBufferWriter<byte>();
-        using var writer = new Utf8JsonWriter(bufferWriter);
+        var stream = new MemoryStream();
+        using var writer = new Utf8JsonWriter(stream);
 
         // Act
         converter.Write(writer, AuthorRole.Tool, JsonSerializerOptions.Default);
+        writer.Flush();
 
         // Assert
-        Assert.Equal("\"function\""u8, bufferWriter.GetSpan().Trim((byte)'\0'));
+        Assert.Equal("\"function\""u8.ToArray(), stream.ToArray());
     }
 
     [Fact]
     public void WriteWhenRoleIsNullReturnsNull()
     {
         // Arrange
         var converter = new AuthorRoleConverter();
-        var bufferWriter = new ArrayBufferWriter<byte>();
-        using var writer = new Utf8JsonWriter(bufferWriter);
+        var stream = new MemoryStream();
+        using var writer = new Utf8JsonWriter(stream);
 
         // Act
         converter.Write(writer, null, JsonSerializerOptions.Default);
+        writer.Flush();
 
         // Assert
-        Assert.Equal("null"u8, bufferWriter.GetSpan().Trim((byte)'\0'));
+        Assert.Equal("null"u8.ToArray(), stream.ToArray());
     }
 
     [Fact]
     public void WriteWhenRoleIsNotUserOrAssistantOrToolThrows()
     {
         // Arrange
         var converter = new AuthorRoleConverter();
-        using var writer = new Utf8JsonWriter(new ArrayBufferWriter<byte>());
+        var stream = new MemoryStream();
+        using var writer = new Utf8JsonWriter(stream);
 
         // Act
         void Act()

dotnet/src/Connectors/Connectors.Google.UnitTests/Core/Gemini/Clients/GeminiChatGenerationFunctionCallingTests.cs

@@ -32,7 +32,7 @@ public GeminiChatGenerationFunctionCallingTests()
     {
         this._responseContent = File.ReadAllText(ChatTestDataFilePath);
         this._responseContentWithFunction = File.ReadAllText(ChatTestDataWithFunctionFilePath)
-            .Replace("%nameSeparator%", GeminiFunction.NameSeparator, StringComparison.Ordinal);
+            .Replace("%nameSeparator%", GeminiFunction.NameSeparator);
         this._messageHandlerStub = new HttpMessageHandlerStub();
         this._messageHandlerStub.ResponseToReturn.Content = new StringContent(
             this._responseContent);

dotnet/src/Connectors/Connectors.Google.UnitTests/Core/Gemini/Clients/GeminiChatGenerationTests.cs

@@ -71,7 +71,7 @@ public async Task ShouldContainRolesInRequestAsync()
     {
         // Arrange
         this._messageHandlerStub.ResponseToReturn.Content = new StringContent(
-            await File.ReadAllTextAsync(ChatTestDataFilePath));
+            File.ReadAllText(ChatTestDataFilePath));
         var client = this.CreateChatCompletionClient();
         var chatHistory = CreateSampleChatHistory();
 
@@ -115,7 +115,7 @@ public async Task ShouldReturnValidGeminiMetadataAsync()
 
         // Assert
         GeminiResponse testDataResponse = JsonSerializer.Deserialize<GeminiResponse>(
-            await File.ReadAllTextAsync(ChatTestDataFilePath))!;
+            File.ReadAllText(ChatTestDataFilePath))!;
         var testDataCandidate = testDataResponse.Candidates![0];
         var textContent = chatMessageContents.SingleOrDefault();
         Assert.NotNull(textContent);
@@ -160,7 +160,7 @@ public async Task ShouldReturnValidDictionaryMetadataAsync()
 
         // Assert
         GeminiResponse testDataResponse = JsonSerializer.Deserialize<GeminiResponse>(
-            await File.ReadAllTextAsync(ChatTestDataFilePath))!;
+            File.ReadAllText(ChatTestDataFilePath))!;
         var testDataCandidate = testDataResponse.Candidates![0];
         var textContent = chatMessageContents.SingleOrDefault();
         Assert.NotNull(textContent);

dotnet/src/Connectors/Connectors.Google.UnitTests/Core/Gemini/Clients/GeminiChatStreamingFunctionCallingTests.cs

@@ -32,7 +32,7 @@ public GeminiChatStreamingFunctionCallingTests()
     {
         this._responseContent = File.ReadAllText(ChatTestDataFilePath);
         this._responseContentWithFunction = File.ReadAllText(ChatTestDataWithFunctionFilePath)
-            .Replace("%nameSeparator%", GeminiFunction.NameSeparator, StringComparison.Ordinal);
+            .Replace("%nameSeparator%", GeminiFunction.NameSeparator);
         this._messageHandlerStub = new HttpMessageHandlerStub();
         this._messageHandlerStub.ResponseToReturn.Content = new StringContent(
             this._responseContent);

dotnet/src/Connectors/Connectors.Google.UnitTests/Core/Gemini/Clients/GeminiChatStreamingTests.cs

@@ -100,7 +100,7 @@ public async Task ShouldReturnValidChatResponseAsync()
 
         // Assert
         List<GeminiResponse> testDataResponse = JsonSerializer.Deserialize<List<GeminiResponse>>(
-            await File.ReadAllTextAsync(StreamTestDataFilePath))!;
+            File.ReadAllText(StreamTestDataFilePath))!;
 
         Assert.NotEmpty(chatMessageContents);
         Assert.Equal(testDataResponse.Count, chatMessageContents.Count);
@@ -128,7 +128,7 @@ public async Task ShouldReturnValidGeminiMetadataAsync()
 
         // Assert
         GeminiResponse testDataResponse = JsonSerializer.Deserialize<List<GeminiResponse>>(
-            await File.ReadAllTextAsync(StreamTestDataFilePath))![0];
+            File.ReadAllText(StreamTestDataFilePath))![0];
         var testDataCandidate = testDataResponse.Candidates![0];
         var textContent = chatMessageContents.FirstOrDefault();
         Assert.NotNull(textContent);
@@ -174,7 +174,7 @@ public async Task ShouldReturnValidDictionaryMetadataAsync()
 
         // Assert
         GeminiResponse testDataResponse = JsonSerializer.Deserialize<List<GeminiResponse>>(
-            await File.ReadAllTextAsync(StreamTestDataFilePath))![0];
+            File.ReadAllText(StreamTestDataFilePath))![0];
         var testDataCandidate = testDataResponse.Candidates![0];
         var textContent = chatMessageContents.FirstOrDefault();
         Assert.NotNull(textContent);

dotnet/src/Connectors/Connectors.Google.UnitTests/Core/Gemini/GeminiRequestTests.cs

@@ -215,7 +215,7 @@ public void FromChatHistoryCalledToolNotNullAddsFunctionResponse()
     {
         // Arrange
         ChatHistory chatHistory = [];
-        var kvp = KeyValuePair.Create("sampleKey", "sampleValue");
+        var kvp = new KeyValuePair<string, string>("sampleKey", "sampleValue");
         var expectedArgs = new JsonObject { [kvp.Key] = kvp.Value };
         var kernelFunction = KernelFunctionFactory.CreateFromMethod(() => "");
         var toolCall = new GeminiFunctionToolCall(new GeminiPart.FunctionCallPart { FunctionName = "function-name" });
@@ -242,7 +242,7 @@ public void FromChatHistoryToolCallsNotNullAddsFunctionCalls()
     {
         // Arrange
         ChatHistory chatHistory = [];
-        var kvp = KeyValuePair.Create("sampleKey", "sampleValue");
+        var kvp = new KeyValuePair<string, string>("sampleKey", "sampleValue");
         var expectedArgs = new JsonObject { [kvp.Key] = kvp.Value };
         var toolCallPart = new GeminiPart.FunctionCallPart
         { FunctionName = "function-name", Arguments = expectedArgs };

dotnet/src/Connectors/Connectors.Google.UnitTests/Core/Gemini/GeminiStreamResponseTests.cs

@@ -3,6 +3,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Text;
 using System.Text.Json;
 using System.Threading.Tasks;
 using Microsoft.SemanticKernel.Connectors.Google.Core;
@@ -27,7 +28,7 @@ public async Task SerializationShouldPopulateAllPropertiesAsync()
         // Arrange
         var parser = new StreamJsonParser();
         var stream = new MemoryStream();
-        var streamExample = await File.ReadAllTextAsync(StreamTestDataFilePath);
+        var streamExample = File.ReadAllText(StreamTestDataFilePath);
         var sampleResponses = JsonSerializer.Deserialize<List<GeminiResponse>>(streamExample)!;
 
         WriteToStream(stream, streamExample);
@@ -43,7 +44,7 @@ public async Task SerializationShouldPopulateAllPropertiesAsync()
 
     private static void WriteToStream(Stream stream, string input)
     {
-        using var writer = new StreamWriter(stream, leaveOpen: true);
+        using var writer = new StreamWriter(stream, Encoding.UTF8, bufferSize: 0x1000, leaveOpen: true);
         writer.Write(input);
         writer.Flush();
         stream.Position = 0;

dotnet/src/Connectors/Connectors.Google.UnitTests/Core/GoogleAI/GoogleAIClientEmbeddingsGenerationTests.cs

@@ -87,12 +87,11 @@ public async Task ShouldReturnValidEmbeddingsResponseAsync()
         var embeddings = await client.GenerateEmbeddingsAsync(dataToEmbed);
 
         // Assert
-        GoogleAIEmbeddingResponse testDataResponse = JsonSerializer.Deserialize<GoogleAIEmbeddingResponse>(
-            await File.ReadAllTextAsync(TestDataFilePath))!;
+        GoogleAIEmbeddingResponse testDataResponse = JsonSerializer.Deserialize<GoogleAIEmbeddingResponse>(File.ReadAllText(TestDataFilePath))!;
         Assert.NotNull(embeddings);
         Assert.Collection(embeddings,
-            values => Assert.Equal(testDataResponse.Embeddings[0].Values, values),
-            values => Assert.Equal(testDataResponse.Embeddings[1].Values, values));
+            values => Assert.Equal(testDataResponse.Embeddings[0].Values.ToArray(), values.ToArray()),
+            values => Assert.Equal(testDataResponse.Embeddings[1].Values.ToArray(), values.ToArray()));
     }
 
     [Fact]

dotnet/src/Connectors/Connectors.Google.UnitTests/Core/VertexAI/VertexAIClientEmbeddingsGenerationTests.cs

@@ -64,12 +64,11 @@ public async Task ShouldReturnValidEmbeddingsResponseAsync()
         var embeddings = await client.GenerateEmbeddingsAsync(dataToEmbed);
 
         // Assert
-        VertexAIEmbeddingResponse testDataResponse = JsonSerializer.Deserialize<VertexAIEmbeddingResponse>(
-            await File.ReadAllTextAsync(TestDataFilePath))!;
+        VertexAIEmbeddingResponse testDataResponse = JsonSerializer.Deserialize<VertexAIEmbeddingResponse>(File.ReadAllText(TestDataFilePath))!;
         Assert.NotNull(embeddings);
         Assert.Collection(embeddings,
-            values => Assert.Equal(testDataResponse.Predictions[0].Embeddings.Values, values),
-            values => Assert.Equal(testDataResponse.Predictions[1].Embeddings.Values, values));
+            values => Assert.Equal(testDataResponse.Predictions[0].Embeddings.Values.ToArray(), values.ToArray()),
+            values => Assert.Equal(testDataResponse.Predictions[1].Embeddings.Values.ToArray(), values.ToArray()));
     }
 
     [Fact]

dotnet/src/Connectors/Connectors.HuggingFace.UnitTests/Connectors.HuggingFace.UnitTests.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <AssemblyName>SemanticKernel.Connectors.HuggingFace.UnitTests</AssemblyName>
     <RootNamespace>SemanticKernel.Connectors.HuggingFace.UnitTests</RootNamespace>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;net462</TargetFrameworks>
     <IsTestProject>true</IsTestProject>
     <Nullable>enable</Nullable>
     <ImplicitUsings>disable</ImplicitUsings>

dotnet/src/Connectors/Connectors.HuggingFace.UnitTests/MultipleHttpMessageHandlerStub.cs

@@ -9,7 +9,7 @@
 
 namespace SemanticKernel.Connectors.HuggingFace.UnitTests;
 
-#pragma warning disable CA1812
+#pragma warning disable CA1812, CA2016
 
 internal sealed class MultipleHttpMessageHandlerStub : DelegatingHandler
 {
@@ -36,7 +36,7 @@ protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage
         this.RequestHeaders.Add(request.Headers);
         this.ContentHeaders.Add(request.Content?.Headers);
 
-        var content = request.Content is null ? null : await request.Content.ReadAsByteArrayAsync(cancellationToken);
+        var content = request.Content is null ? null : await request.Content.ReadAsByteArrayAsync();
 
         this.RequestContents.Add(content);
 

dotnet/src/Connectors/Connectors.HuggingFace.UnitTests/Services/HuggingFaceImageToTextTests.cs

@@ -163,7 +163,7 @@ public async Task ShouldSendPromptToServiceAsync()
         var requestPayload = this._messageHandlerStub.RequestContent;
 
         Assert.NotNull(requestPayload);
-        Assert.Equal(this._imageContentInput.Data!.Value.Span, requestPayload);
+        Assert.Equal(this._imageContentInput.Data!.Value.ToArray(), requestPayload);
     }
 
     [Fact]

dotnet/src/Connectors/Connectors.HuggingFace.UnitTests/TextGeneration/TextGenerationStreamResponseTests.cs

@@ -2,6 +2,7 @@
 
 using System.Collections.Generic;
 using System.IO;
+using System.Text;
 using System.Text.Json;
 using System.Threading.Tasks;
 using Microsoft.SemanticKernel.Connectors.HuggingFace.Core;
@@ -75,7 +76,7 @@ public async Task SerializationShouldPopulateAllPropertiesAsync()
 
     private static void WriteToStream(Stream stream, string input)
     {
-        using var writer = new StreamWriter(stream, leaveOpen: true);
+        using var writer = new StreamWriter(stream, Encoding.UTF8, 0x1000, leaveOpen: true);
         writer.Write(input);
         writer.Flush();
         stream.Position = 0;

dotnet/src/Connectors/Connectors.MistralAI.UnitTests/Client/MistralClientTests.cs

@@ -477,7 +477,7 @@ public class WidgetFactory
         [Description("Creates a new widget of the specified type and colors")]
         public string CreateWidget([Description("The colors of the widget to be created")] WidgetColor[] widgetColors)
         {
-            var colors = string.Join('-', widgetColors.Select(c => c.GetDisplayName()).ToArray());
+            var colors = string.Join("-", widgetColors.Select(c => c.GetDisplayName()).ToArray());
             return $"Widget created with colors: {colors}";
         }
     }

dotnet/src/Connectors/Connectors.MistralAI.UnitTests/Connectors.MistralAI.UnitTests.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <AssemblyName>SemanticKernel.Connectors.MistralAI.UnitTests</AssemblyName>
     <RootNamespace>SemanticKernel.Connectors.MistralAI.UnitTests</RootNamespace>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;net462</TargetFrameworks>
     <LangVersion>12</LangVersion>
     <RollForward>LatestMajor</RollForward>
     <IsTestProject>true</IsTestProject>

dotnet/src/Connectors/Connectors.MistralAI.UnitTests/MistralTestBase.cs

@@ -11,6 +11,9 @@
 using Xunit;
 
 namespace SemanticKernel.Connectors.MistralAI.UnitTests;
+
+#pragma warning disable CA2016
+
 public abstract class MistralTestBase : IDisposable
 {
     protected AssertingDelegatingHandler? DelegatingHandler { get; set; }
@@ -94,7 +97,7 @@ protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage
             Assert.Equal(this.Method, request.Method);
             Assert.Equal(this.RequestHeaders, request.Headers);
 
-            this.RequestContent = await request.Content!.ReadAsStringAsync(cancellationToken);
+            this.RequestContent = await request.Content!.ReadAsStringAsync();
 
             if (this._responseStringArray is not null)
             {

dotnet/src/Connectors/Connectors.Onnx.UnitTests/Connectors.Onnx.UnitTests.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <AssemblyName>SemanticKernel.Connectors.Onnx.UnitTests</AssemblyName>
     <RootNamespace>SemanticKernel.Connectors.Onnx.UnitTests</RootNamespace>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;net462</TargetFrameworks>
     <IsTestProject>true</IsTestProject>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>

dotnet/src/Connectors/Connectors.UnitTests/Connectors.UnitTests.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <AssemblyName>SemanticKernel.Connectors.UnitTests</AssemblyName>
     <RootNamespace>SemanticKernel.Connectors.UnitTests</RootNamespace>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFrameworks>net8.0;net462</TargetFrameworks>
     <IsTestProject>true</IsTestProject>
     <Nullable>enable</Nullable>
     <ImplicitUsings>disable</ImplicitUsings>