private static string CreateCompilationErrorMessage([NotNull] EmitResult emitResult, [NotNull] SyntaxTree syntaxTree)
{
if (emitResult == null)
{
throw new ArgumentNullException(nameof(emitResult));
}
if (syntaxTree == null)
{
throw new ArgumentNullException(nameof(syntaxTree));
}
if (emitResult.Success)
{
throw new ArgumentException("EmitResult should contain failed compilation result.", nameof(emitResult));
}
var message = new StringBuilder()
.AppendLine("Compilation failed:");
foreach (var diagnostic in emitResult.Diagnostics.Where(item => item.Severity == DiagnosticSeverity.Error))
{
message
.Append(diagnostic.Id)
.Append(": ")
.AppendLine(diagnostic.GetMessage(CultureInfo.InvariantCulture));
}
var code = Formatter.Format(syntaxTree.GetRoot(), new AdhocWorkspace()).ToString();
message.AppendLine()
.AppendLine("Generated code:")
.AppendLine()
.AppendLine(code);
return(message.ToString());
}
/// <summary>
/// Save generated code as a string.
/// </summary>
/// <param name="cu">Generated code.</param>
/// <returns>Generated code as a string.</returns>
public string SaveCodeAsString(CompilationUnitSyntax cu)
{
if (cu == null)
{
throw new ArgumentNullException(nameof(cu));
}
var workspace = CreateWorkspace();
var formattedCode = Formatter.Format(cu, workspace);
return(formattedCode.ToFullString());
}
/// <summary>
/// Save generated code to a file.
/// </summary>
/// <param name="cu">Generated code.</param>
/// <param name="path">Full output path.</param>
public void SaveCodeToFile(CompilationUnitSyntax cu, string path)
{
if (cu == null)
{
throw new ArgumentNullException(nameof(cu));
}
if (string.IsNullOrEmpty(path))
{
throw new ArgumentException("Value cannot be null or empty.", nameof(path));
}
var workspace = CreateWorkspace();
var formattedCode = Formatter.Format(cu, workspace);
using (var sourceWriter = new StreamWriter(path))
{
formattedCode.WriteTo(sourceWriter);
}
}
protected override async Task <Solution> ProcessAsync(Document document, SyntaxNode syntaxNode, CancellationToken cancellationToken)
{
var root = syntaxNode as CompilationUnitSyntax;
if (root == null)
{
return(document.Project.Solution);
}
if (!LoadMSTestNamespaces())
{
return(document.Project.Solution);
}
var originalRoot = root;
SemanticModel semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
List <UsingDirectiveSyntax> newUsings = new List <UsingDirectiveSyntax>();
bool needsChanges = false;
foreach (var usingSyntax in root.Usings)
{
var symbolInfo = semanticModel.GetSymbolInfo(usingSyntax.Name);
if (symbolInfo.Symbol != null)
{
string namespaceDocID = symbolInfo.Symbol.GetDocumentationCommentId();
if (s_mstestNamespaces.Contains(namespaceDocID))
{
needsChanges = true;
}
else
{
newUsings.Add(RemoveLeadingAndTrailingCompilerDirectives(usingSyntax));
}
}
else
{
newUsings.Add(RemoveLeadingAndTrailingCompilerDirectives(usingSyntax));
}
}
if (!needsChanges)
{
return(document.Project.Solution);
}
TransformationTracker transformationTracker = new TransformationTracker();
RemoveTestClassAttributes(root, semanticModel, transformationTracker);
RemoveContractsRequiredAttributes(root, semanticModel, transformationTracker);
ChangeTestInitializeAttributesToCtor(root, semanticModel, transformationTracker);
ChangeTestCleanupAttributesToDispose(root, semanticModel, transformationTracker);
ChangeTestMethodAttributesToFact(root, semanticModel, transformationTracker);
ChangeAssertCalls(root, semanticModel, transformationTracker);
root = transformationTracker.TransformRoot(root);
// Remove compiler directives before the first member of the file (e.g. an #endif after the using statements)
var firstMember = root.Members.FirstOrDefault();
if (firstMember != null)
{
if (firstMember.HasLeadingTrivia)
{
var newLeadingTrivia = RemoveCompilerDirectives(firstMember.GetLeadingTrivia());
root = root.ReplaceNode(firstMember, firstMember.WithLeadingTrivia(newLeadingTrivia));
}
}
var xUnitUsing = SyntaxFactory.UsingDirective(SyntaxFactory.ParseName("Xunit")).NormalizeWhitespace();
newUsings.Add(xUnitUsing);
// Apply trailing trivia from original last using statement to new last using statement
SyntaxTriviaList usingTrailingTrivia = RemoveCompilerDirectives(originalRoot.Usings.Last().GetTrailingTrivia());
newUsings[newUsings.Count - 1] = newUsings.Last().WithTrailingTrivia(usingTrailingTrivia);
root = root.WithUsings(SyntaxFactory.List <UsingDirectiveSyntax>(newUsings));
document = document.WithSyntaxRoot(root);
document = await Formatter.FormatAsync(document, cancellationToken : cancellationToken);
var solution = document.Project.Solution;
return(solution);
}