public void Test_SolutionSize_Update()
{
var expected = 12345;
var solution = CreateSolution(expected);
var analyzer = new SolutionSizeTracker.IncrementalAnalyzer();
// initialize
analyzer.NewSolutionSnapshotAsync(solution, CancellationToken.None).Wait();
AddSolution(analyzer, solution);
// update document
var document = solution.Projects.First().Documents.First();
var length = document.GetSyntaxTreeAsync().Result.Length;
var text = SourceText.From(new string('2', 1000));
var newDocument = document.WithText(text);
analyzer.AnalyzeSyntaxAsync(newDocument, CancellationToken.None).Wait();
var size = analyzer.GetSolutionSize(solution.Id);
Assert.Equal(expected - length + text.Length, size);
}