reactive/Rx.NET/Source/tests/Tests.System.Reactive.ApiApprovals/DiffPlexReporter.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT License.
// See the LICENSE file in the project root for more information. 

#nullable enable

using System;
using System.IO;
using System.Threading.Tasks;
using DiffPlex;
using DiffPlex.DiffBuilder;
using DiffPlex.DiffBuilder.Model;

namespace ReactiveTests.Tests
{
    public static class DiffPlexReporter
    {
        public static Task Report(string receivedFile, string verifiedFile, string? message)
        {
#if (!DEBUG)
            var receivedText = File.ReadAllText(receivedFile);
            var verifiedText = File.ReadAllText(verifiedFile);
            var diffBuilder = new InlineDiffBuilder(new Differ());
            var diff = diffBuilder.BuildDiffModel(verifiedText, receivedText);

            foreach (var line in diff.Lines)
            {
                if (line.Type == ChangeType.Unchanged) continue;

                var prefix = "  ";
                switch (line.Type)
                {
                    case ChangeType.Inserted:
                        prefix = "+ ";
                        break;
                    case ChangeType.Deleted:
                        prefix = "- ";
                        break;
                }

                Console.WriteLine("{0}{1}", prefix, line.Text);
            }
#endif

            return Task.CompletedTask;
        }
    }
}