Add polyfill for File.AppendAllBytes(...)

PolyShim.Tests/Net90/FileTests.cs

@@ -1,26 +1,58 @@
 using System.IO;
 using System.Threading.Tasks;
+using FluentAssertions;
 using Xunit;
 
 namespace PolyShim.Tests.Net90;
 
 public class FileTests
 {
+    [Fact]
+    public void AppendAllBytes_Test()
+    {
+        // Arrange
+        var tempFilePath = Path.GetTempFileName();
+
+        try
+        {
+            File.WriteAllBytes(tempFilePath, [0x00, 0x01, 0x02]);
+
+            // Act
+            File.AppendAllBytes(tempFilePath, new byte[] { 0x0A, 0x0B, 0x0C, 0x0D, 0x0E });
+
+            // Assert
+            var readBytes = File.ReadAllBytes(tempFilePath);
+            readBytes.Should().Equal(0x00, 0x01, 0x02, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E);
+        }
+        finally
+        {
+            try
+            {
+                File.Delete(tempFilePath);
+            }
+            catch
+            {
+                // Ignore
+            }
+        }
+    }
+
     [Fact]
     public async Task AppendAllBytesAsync_Test()
     {
         // Arrange
-        var bytesToAppend = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05 };
         var tempFilePath = Path.GetTempFileName();
 
         try
         {
+            await File.WriteAllBytesAsync(tempFilePath, [0x00, 0x01, 0x02]);
+
             // Act
-            await File.AppendAllBytesAsync(tempFilePath, bytesToAppend);
+            await File.AppendAllBytesAsync(tempFilePath, [0x01, 0x02, 0x03, 0x04, 0x05]);
 
             // Assert
             var readBytes = await File.ReadAllBytesAsync(tempFilePath);
-            Assert.Equal(bytesToAppend, readBytes);
+            readBytes.Should().Equal(0x00, 0x01, 0x02, 0x01, 0x02, 0x03, 0x04, 0x05);
         }
         finally
         {

PolyShim.Tests/NetCore20/FileTests.cs

@@ -130,7 +130,7 @@ public async Task ReadAllLinesAsync_Test()
     public async Task ReadAllTextAsync_Test()
     {
         // Arrange
-        var textToWrite = "This is a sample text for testing ReadAllTextAsync.";
+        const string textToWrite = "This is a sample text for testing ReadAllTextAsync.";
         var tempFilePath = Path.GetTempFileName();
 
         try
@@ -218,7 +218,7 @@ public async Task WriteAllLinesAsync_Test()
     public async Task WriteAllTextAsync_Test()
     {
         // Arrange
-        var textToWrite = "Testing WriteAllTextAsync method.";
+        const string textToWrite = "Testing WriteAllTextAsync method.";
         var tempFilePath = Path.GetTempFileName();
 
         try

PolyShim/Net90/File.cs

@@ -15,8 +15,20 @@ internal static partial class PolyfillExtensions
 #if !NETSTANDARD || NETSTANDARD1_3_OR_GREATER
     extension(File)
     {
-#if FEATURE_TASK
+        // https://learn.microsoft.com/dotnet/api/system.io.file.appendallbytes#system-io-file-appendallbytes(system-string-system-byte())
+        public static void AppendAllBytes(string path, byte[] bytes)
+        {
+            using var stream = new FileStream(
+                path,
+                FileMode.Append,
+                FileAccess.Write,
+                FileShare.None
+            );
 
+            stream.Write(bytes, 0, bytes.Length);
+        }
+
+#if FEATURE_TASK
         // https://learn.microsoft.com/dotnet/api/system.io.file.appendallbytesasync#system-io-file-appendallbytesasync(system-string-system-byte()-system-threading-cancellationtoken)
         public static async Task AppendAllBytesAsync(
             string path,

PolyShim/Signatures.md

@@ -1,8 +1,8 @@
 # Signatures
 
-- **Total:** 237
+- **Total:** 238
 - **Types:** 62
-- **Members:** 175
+- **Members:** 176
 
 ___
 
@@ -71,6 +71,7 @@ ___
   - [`Task<string[]> ReadAllLinesAsync(string, Encoding, CancellationToken)`](https://learn.microsoft.com/dotnet/api/system.io.file.readalllinesasync#system-io-file-readalllinesasync(system-string-system-text-encoding-system-threading-cancellationtoken)) <sup><sub>.NET Core 2.0</sub></sup>
   - [`Task<string> ReadAllTextAsync(string, CancellationToken)`](https://learn.microsoft.com/dotnet/api/system.io.file.readalltextasync#system-io-file-readalltextasync(system-string-system-threading-cancellationtoken)) <sup><sub>.NET Core 2.0</sub></sup>
   - [`Task<string> ReadAllTextAsync(string, Encoding, CancellationToken)`](https://learn.microsoft.com/dotnet/api/system.io.file.readalltextasync#system-io-file-readalltextasync(system-string-system-text-encoding-system-threading-cancellationtoken)) <sup><sub>.NET Core 2.0</sub></sup>
+  - [`void AppendAllBytes(string, byte[])`](https://learn.microsoft.com/dotnet/api/system.io.file.appendallbytes#system-io-file-appendallbytes(system-string-system-byte())) <sup><sub>.NET 9.0</sub></sup>
   - [`void Move(string, string, bool)`](https://learn.microsoft.com/dotnet/api/system.io.file.move#system-io-file-move(system-string-system-string-system-boolean)) <sup><sub>.NET Core 3.0</sub></sup>
 - `HashCode`
   - [**[class]**](https://learn.microsoft.com/dotnet/api/system.hashcode) <sup><sub>.NET Core 2.1</sub></sup>