tests: verify correctness on big-endian systems

Author: unsafePtr

src/Base58Encoding.Tests/BigEndianTests.cs

@@ -0,0 +1,62 @@
+using System.Diagnostics;
+
+namespace Base58Encoding.Tests;
+
+public class BigEndianTests
+{
+    private readonly ITestOutputHelper _output;
+
+    public BigEndianTests(ITestOutputHelper output)
+    {
+        _output = output;
+    }
+
+    /// <summary>
+    /// Alternatively can be run manually to verify compatibility on big-endian systems using below command
+    /// docker run -it --rm --platform linux/s390x -v ProjectPath/src:/src registry.access.redhat.com/dotnet/sdk:10.0 sh -c "cd /src/Base58Encoding.Tests && dotnet run"
+    /// </summary>
+    [Fact(Skip = "For local usage only")]
+    public void Base58Encoding_Works_On_BigEndian_ViaProcess()
+    {
+        if (!BitConverter.IsLittleEndian)
+        {
+            _output.WriteLine("Skipping big-endian verification as already running on big-endian environment.");
+            return;
+        }
+
+        var path = FindSrcPath();
+
+        var process = new Process
+        {
+            StartInfo = new ProcessStartInfo
+            {
+                FileName = "docker",
+                Arguments = $"run --rm --platform linux/s390x -v {path}:/src registry.access.redhat.com/dotnet/sdk:10.0 sh -c \"cd /src/Base58Encoding.Tests && dotnet run --no-restore --no-build\"",
+                RedirectStandardOutput = true,
+                RedirectStandardError = true,
+                UseShellExecute = false
+            }
+        };
+
+        process.Start();
+        string output = process.StandardOutput.ReadToEnd();
+        process.WaitForExit();
+
+        Assert.Equal(0, process.ExitCode);
+        Assert.Contains("Passed!", output);
+
+        _output.Write(output);
+    }
+
+    private static string FindSrcPath()
+    {
+        var dir = new DirectoryInfo(Directory.GetCurrentDirectory());
+        while (dir != null && dir.Name != "src" && !dir.GetFiles("*.slnx").Any())
+        {
+            dir = dir.Parent;
+        }
+
+        if (dir == null) throw new Exception("Src path not found.");
+        return Path.GetFullPath(dir.FullName);
+    }
+}