public static void VerifyFix(
string source,
string newSource,
DiagnosticAnalyzer analyzer,
CodeFixProvider fixProvider,
string language,
bool allowNewCompilerDiagnostics = false)
{
Assert.True(fixProvider.CanFixAny(analyzer.SupportedDiagnostics), $"Code fix provider '{fixProvider.GetType().Name}' cannot fix any diagnostic supported by analyzer '{analyzer}'.");
Document document = WorkspaceFactory.CreateDocument(source, language);
ImmutableArray <Diagnostic> compilerDiagnostics = document.GetCompilerDiagnostics();
DiagnosticVerifier.VerifyNoCompilerError(compilerDiagnostics);
Diagnostic[] analyzerDiagnostics = DiagnosticUtility.GetSortedDiagnostics(document, analyzer);
while (analyzerDiagnostics.Length > 0)
{
Diagnostic diagnostic = null;
foreach (Diagnostic analyzerDiagnostic in analyzerDiagnostics)
{
if (fixProvider.FixableDiagnosticIds.Contains(analyzerDiagnostic.Id))
{
diagnostic = analyzerDiagnostic;
break;
}
}
if (diagnostic == null)
{
break;
}
List <CodeAction> actions = null;
var context = new CodeFixContext(
document,
diagnostic,
(a, _) => (actions ?? (actions = new List <CodeAction>())).Add(a),
CancellationToken.None);
fixProvider.RegisterCodeFixesAsync(context).Wait();
if (actions == null)
{
break;
}
document = document.ApplyCodeAction(actions[0]);
if (!allowNewCompilerDiagnostics)
{
DiagnosticVerifier.VerifyNoNewCompilerDiagnostics(document, compilerDiagnostics);
}
analyzerDiagnostics = DiagnosticUtility.GetSortedDiagnostics(document, analyzer);
}
string actual = document.ToSimplifiedAndFormattedFullString();
Assert.Equal(newSource, actual);
}