TestFileRewriter.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;

namespace ICSharpCode.CodeConverter.Tests.TestRunners;

public static class TestFileRewriter
{
    private static readonly Lazy<Dictionary<string, string>> FileContents = new(GetTestFileContents);

    private static Dictionary<string, string> GetTestFileContents()
    {
        return Directory.GetFiles(GetTestSourceDirectoryPath(), "*Tests.cs", SearchOption.AllDirectories)
            .ToDictionary(f => f, s => File.ReadAllText(s, Encoding.UTF8));
    }

    private static string GetTestSourceDirectoryPath()
    {
        string assemblyDir = Path.GetDirectoryName(new Uri(Assembly.GetExecutingAssembly().Location).AbsolutePath);
        string testSourceDirectoryPath = Path.Combine(assemblyDir, "..", "..", "..");
        return testSourceDirectoryPath;
    }

    public static void UpdateFiles(string expected, string actual)
    {
        lock (FileContents) {
            foreach (var fileContent in FileContents.Value) {
                var newFc = fileContent.Value.Replace(expected.Replace("\"", "\"\""), actual.Replace("\"", "\"\""));
                if (fileContent.Value != newFc) {
                    FileContents.Value[fileContent.Key] = newFc;
                    File.WriteAllText(fileContent.Key, newFc, Encoding.UTF8);
                    return;
                }
            }
        }
    }
}