/// <summary>
/// Verifies that specified source will produce compiler diagnostic.
/// </summary>
/// <param name="data"></param>
/// <param name="expected"></param>
/// <param name="options"></param>
/// <param name="cancellationToken"></param>
public async Task VerifyFixAsync(
CompilerDiagnosticFixTestData data,
ExpectedTestState expected,
TestOptions options = null,
CancellationToken cancellationToken = default)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
if (expected == null)
{
throw new ArgumentNullException(nameof(expected));
}
cancellationToken.ThrowIfCancellationRequested();
options ??= Options;
TFixProvider fixProvider = Activator.CreateInstance <TFixProvider>();
VerifyFixableDiagnostics(fixProvider, data.DiagnosticId);
using (Workspace workspace = new AdhocWorkspace())
{
(Document document, ImmutableArray <ExpectedDocument> expectedDocuments) = CreateDocument(workspace.CurrentSolution, data.Source, data.AdditionalFiles, options);
Project project = document.Project;
document = project.GetDocument(document.Id);
ImmutableArray <Diagnostic> previousDiagnostics = ImmutableArray <Diagnostic> .Empty;
var fixRegistered = false;
while (true)
{
cancellationToken.ThrowIfCancellationRequested();
Compilation compilation = await document.Project.GetCompilationAsync(cancellationToken);
ImmutableArray <Diagnostic> diagnostics = compilation.GetDiagnostics(cancellationToken: cancellationToken);
int length = diagnostics.Length;
if (length == 0)
{
if (!fixRegistered)
{
Fail("No compiler diagnostic found.");
}
break;
}
if (previousDiagnostics.Any())
{
VerifyNoNewCompilerDiagnostics(previousDiagnostics, diagnostics, options);
}
if (DiagnosticDeepEqualityComparer.Equals(diagnostics, previousDiagnostics))
{
Fail("Same diagnostics returned before and after the fix was applied.", diagnostics);
}
Diagnostic diagnostic = FindDiagnosticToFix(diagnostics);
if (diagnostic == null)
{
if (!fixRegistered)
{
Fail($"No compiler diagnostic with ID '{data.DiagnosticId}' found.", diagnostics);
}
break;
}
CodeAction action = null;
List <CodeAction> candidateActions = null;
var context = new CodeFixContext(
document,
diagnostic,
(a, d) =>
{
if ((data.EquivalenceKey == null ||
string.Equals(data.EquivalenceKey, a.EquivalenceKey, StringComparison.Ordinal)) &&
d.Contains(diagnostic))
{
if (action != null)
{
Fail($"Multiple fixes registered by '{fixProvider.GetType().Name}'.", new CodeAction[] { action, a });
}
action = a;
}
else
{
(candidateActions ??= new List <CodeAction>()).Add(a);
}
},
/// <summary>
/// Verifies that specified source will produce compiler diagnostic.
/// </summary>
/// <param name="state"></param>
/// <param name="expected"></param>
/// <param name="options"></param>
/// <param name="cancellationToken"></param>
public async Task VerifyFixAsync(
CompilerDiagnosticFixTestState state,
ExpectedTestState expected,
TestOptions options = null,
CancellationToken cancellationToken = default)
{
cancellationToken.ThrowIfCancellationRequested();
options ??= Options;
TFixProvider fixProvider = Activator.CreateInstance <TFixProvider>();
VerifyFixableDiagnostics(fixProvider, state.DiagnosticId);
using (Workspace workspace = new AdhocWorkspace())
{
(Document document, ImmutableArray <ExpectedDocument> expectedDocuments) = CreateDocument(workspace.CurrentSolution, state.Source, state.AdditionalFiles, options);
Project project = document.Project;
document = project.GetDocument(document.Id);
ImmutableArray <Diagnostic> previousDiagnostics = ImmutableArray <Diagnostic> .Empty;
var fixRegistered = false;
while (true)
{
cancellationToken.ThrowIfCancellationRequested();
Compilation compilation = await document.Project.GetCompilationAsync(cancellationToken);
ImmutableArray <Diagnostic> diagnostics = compilation.GetDiagnostics(cancellationToken: cancellationToken);
int length = diagnostics.Length;
if (length == 0)
{
break;
}
if (previousDiagnostics.Any())
{
VerifyNoNewCompilerDiagnostics(previousDiagnostics, diagnostics, options);
}
if (DiagnosticDeepEqualityComparer.Equals(diagnostics, previousDiagnostics))
{
Assert.True(false, "Same diagnostics returned before and after the fix was applied." + diagnostics.ToDebugString());
}
Diagnostic diagnostic = FindDiagnosticToFix(diagnostics);
if (diagnostic == null)
{
break;
}
CodeAction action = null;
var context = new CodeFixContext(
document,
diagnostic,
(a, d) =>
{
if ((state.EquivalenceKey == null ||
string.Equals(state.EquivalenceKey, a.EquivalenceKey, StringComparison.Ordinal)) &&
d.Contains(diagnostic))
{
if (action != null)
{
Assert.True(false, $"Multiple fixes registered by '{fixProvider.GetType().Name}'.");
}
action = a;
}
},
cancellationToken);
await fixProvider.RegisterCodeFixesAsync(context);
if (action == null)
{
break;
}
fixRegistered = true;
document = await VerifyAndApplyCodeActionAsync(document, action, expected.CodeActionTitle);
previousDiagnostics = diagnostics;
}
Assert.True(fixRegistered, "No code fix has been registered.");
await VerifyExpectedDocument(expected, document, cancellationToken);
if (expectedDocuments.Any())
{
await VerifyAdditionalDocumentsAsync(document.Project, expectedDocuments, cancellationToken);
}
}
Diagnostic FindDiagnosticToFix(ImmutableArray <Diagnostic> diagnostics)
{
Diagnostic match = null;
foreach (Diagnostic diagnostic in diagnostics)
{
if (string.Equals(diagnostic.Id, state.DiagnosticId, StringComparison.Ordinal))
{
if (match == null ||
diagnostic.Location.SourceSpan.Start > match.Location.SourceSpan.Start)
{
match = diagnostic;
}
}
}
return(match);
}
}