// 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 disable
 
using System.Collections.Generic;
using Microsoft.CodeAnalysis.Test.Utilities;
using Microsoft.CodeAnalysis.Text;
using Roslyn.Test.Utilities;
 
namespace Microsoft.CodeAnalysis.UnitTests.LinkedFileDiffMerging;
 
[UseExportProvider]
public partial class LinkedFileDiffMergingTests
{
    private static void TestLinkedFileSet(string startText, List<string> updatedTexts, string expectedMergedText, string languageName)
    {
        using var workspace = new AdhocWorkspace();
        var solution = workspace.CurrentSolution;
        var startSourceText = SourceText.From(startText);
        var documentIds = new List<DocumentId>();
 
        for (var i = 0; i < updatedTexts.Count; i++)
        {
            var projectId = ProjectId.CreateNewId();
            var documentId = DocumentId.CreateNewId(projectId);
            documentIds.Add(documentId);
 
            var projectInfo = ProjectInfo.Create(projectId, VersionStamp.Create(), "ProjectName" + i, "AssemblyName" + i, languageName);
 
            solution = solution
                .AddProject(projectInfo)
                .AddDocument(documentId, "DocumentName", startSourceText, filePath: "FilePath");
        }
 
        var startingSolution = solution;
        var updatedSolution = solution;
 
        for (var i = 0; i < updatedTexts.Count; i++)
        {
            var text = updatedTexts[i];
            if (text != startText)
            {
                updatedSolution = updatedSolution
                    .WithDocumentText(documentIds[i], SourceText.From(text));
            }
        }
 
        var mergedSolution = updatedSolution.WithMergedLinkedFileChangesAsync(startingSolution).Result;
        for (var i = 0; i < updatedTexts.Count; i++)
        {
            AssertEx.EqualOrDiff(expectedMergedText, mergedSolution.GetDocument(documentIds[i]).GetTextAsync().Result.ToString());
        }
    }
}