/// <summary>
/// Given an analyzer and a document to apply it to, run the analyzer and gather an array of diagnostics found in it.
/// The returned diagnostics are then ordered by location in the source document.
/// </summary>
/// <param name="analyzer">The analyzer to run on the documents</param>
/// <param name="documents">The Documents that the analyzer will be run on</param>
/// <param name="spans">Optional TextSpan indicating where a Diagnostic will be found</param>
/// <returns>An IEnumerable of Diagnostics that surfaced in teh source code, sorted by Location</returns>
protected static Diagnostic[] GetSortedDiagnosticsFromDocuments(DiagnosticAnalyzer analyzer, Document[] documents)
{
var projects = new HashSet <Project>();
foreach (var document in documents)
{
projects.Add(document.Project);
}
var diagnostics = new List <Diagnostic>();
foreach (var project in projects)
{
var compilation = project.GetCompilationAsync().Result;
var diags = AnalyzerDriver.GetAnalyzerDiagnosticsAsync(compilation, ImmutableArray.Create(analyzer)).Result;
foreach (var diag in diags)
{
if (diag.Location == Location.None || diag.Location.IsInMetadata)
{
diagnostics.Add(diag);
}
else
{
for (int i = 0; i < documents.Length; i++)
{
var document = documents[i];
var tree = document.GetSyntaxTreeAsync().Result;
if (tree == diag.Location.SourceTree)
{
diagnostics.Add(diag);
}
}
}
}
}
var results = SortDiagnostics(diagnostics);
diagnostics.Clear();
return(results);
}
