private string Rename(string buffer, string renameTo)
        {
            var location = TestHelpers.GetLineAndColumnFromDollar(buffer);

            buffer = buffer.Replace("$", "");

            var solution = new FakeSolutionBuilder()
                           .AddFile(buffer)
                           .Build();

            var bufferParser  = new BufferParser(solution);
            var renameHandler = new RenameHandler(solution, bufferParser);
            var request       = new RenameRequest
            {
                Buffer   = buffer,
                Column   = location.Column - 1,
                Line     = location.Line,
                RenameTo = renameTo,
                FileName = "myfile"
            };

            var response = renameHandler.Rename(request);

            if (response.Changes.Any())
            {
                return(response.Changes.First().Buffer);
            }
            return(buffer);
        }
        private IEnumerable <ModifiedFileResponse> Rename(string renameTo, params Buffer[] buffers)
        {
            RenameRequest request         = null;
            var           solutionBuilder = new FakeSolutionBuilder();

            foreach (var buffer in buffers)
            {
                if (buffer.Text.Contains("$"))
                {
                    var location = TestHelpers.GetLineAndColumnFromDollar(buffer.Text);
                    buffer.Text = buffer.Text.Replace("$", "");
                    request     = new RenameRequest
                    {
                        Buffer   = buffer.Text,
                        Column   = location.Column - 1,
                        Line     = location.Line,
                        RenameTo = renameTo,
                        FileName = buffer.Filename
                    };
                }
                //solutionBuilder = solutionBuilder.AddProject();
                solutionBuilder = solutionBuilder.AddFile(buffer.Text, buffer.Filename);
            }
            var solution      = solutionBuilder.Build();
            var bufferParser  = new BufferParser(solution);
            var renameHandler = new RenameHandler(solution, bufferParser, new OmniSharpConfiguration(), new FindUsagesHandler(bufferParser, solution, new ProjectFinder(solution)));

            var response = renameHandler.Rename(request);

            return(response.Changes);
        }