private async static Task VerifyFixAllAsync(string language, DiagnosticAnalyzer analyzer, CodeFixProvider codeFixProvider, string[] oldSources, string[] newSources, bool allowNewCompilerDiagnostics, LanguageVersion languageVersionCSharp, string equivalenceKey = null)
{
var project = CreateProject(oldSources, language, languageVersionCSharp);
var compilerDiagnostics = (await Task.WhenAll(project.Documents.Select(d => GetCompilerDiagnosticsAsync(d))).ConfigureAwait(true)).SelectMany(d => d);
var fixAllProvider = codeFixProvider.GetFixAllProvider();
if (equivalenceKey == null)
{
equivalenceKey = codeFixProvider.GetType().Name;
}
FixAllContext fixAllContext;
if (analyzer != null)
{
var analyzerDiagnostics = await GetSortedDiagnosticsFromDocumentsAsync(analyzer, project.Documents.ToArray()).ConfigureAwait(true);
Func <Document, ImmutableHashSet <string>, CancellationToken, Task <IEnumerable <Diagnostic> > > getDocumentDiagnosticsAsync = (doc, ids, ct) =>
Task.FromResult(analyzerDiagnostics.Where(d => d.Location.SourceTree.FilePath == doc.Name));
Func <Project, bool, ImmutableHashSet <string>, CancellationToken, Task <IEnumerable <Diagnostic> > > getProjectDiagnosticsAsync = (proj, b, ids, ct) =>
Task.FromResult((IEnumerable <Diagnostic>)analyzerDiagnostics); //todo: verify, probably wrong
var fixAllDiagnosticProvider = new FixAllDiagnosticProvider(codeFixProvider.FixableDiagnosticIds.ToImmutableHashSet(), getDocumentDiagnosticsAsync, getProjectDiagnosticsAsync);
fixAllContext = new FixAllContext(project.Documents.First(), codeFixProvider, FixAllScope.Solution,
equivalenceKey,
codeFixProvider.FixableDiagnosticIds,
fixAllDiagnosticProvider,
CancellationToken.None);
}
else
{
Func <Document, ImmutableHashSet <string>, CancellationToken, Task <IEnumerable <Diagnostic> > > getDocumentDiagnosticsAsync = async(doc, ids, ct) =>
{
var compilerDiags = await GetCompilerDiagnosticsAsync(doc).ConfigureAwait(true);
return(compilerDiags.Where(d => codeFixProvider.FixableDiagnosticIds.Contains(d.Id)));
};
Func <Project, bool, ImmutableHashSet <string>, CancellationToken, Task <IEnumerable <Diagnostic> > > getProjectDiagnosticsAsync = async(proj, b, ids, ct) =>
{
var theDocs = proj.Documents;
var diags = await Task.WhenAll(theDocs.Select(d => getDocumentDiagnosticsAsync(d, ids, ct))).ConfigureAwait(true);
return(diags.SelectMany(d => d));
};
var fixAllDiagnosticProvider = new FixAllDiagnosticProvider(codeFixProvider.FixableDiagnosticIds.ToImmutableHashSet(), getDocumentDiagnosticsAsync, getProjectDiagnosticsAsync);
fixAllContext = new FixAllContext(project.Documents.First(), codeFixProvider, FixAllScope.Solution,
equivalenceKey,
codeFixProvider.FixableDiagnosticIds,
fixAllDiagnosticProvider,
CancellationToken.None);
}
var action = await fixAllProvider.GetFixAsync(fixAllContext).ConfigureAwait(true);
if (action == null)
{
throw new Exception("No action supplied for the code fix.");
}
project = await ApplyFixAsync(project, action).ConfigureAwait(true);
//check if applying the code fix introduced any new compiler diagnostics
var newCompilerDiagnostics = GetNewDiagnostics(compilerDiagnostics, (await Task.WhenAll(project.Documents.Select(d => GetCompilerDiagnosticsAsync(d))).ConfigureAwait(true)).SelectMany(d => d));
if (!allowNewCompilerDiagnostics && newCompilerDiagnostics.Any())
{
Assert.True(false, $"Fix introduced new compiler diagnostics:\r\n{string.Join("\r\n", newCompilerDiagnostics.Select(d => d.ToString()))}\r\n");
}
var docs = project.Documents.ToArray();
for (int i = 0; i < docs.Length; i++)
{
var document = docs[i];
var actual = await GetStringFromDocumentAsync(document).ConfigureAwait(true);
newSources[i].Should().Be(actual);
}
}