private static string GetDiagnosticDescription(DiagnosticDescription d, int indentDepth)
{
return(new string(' ', 4 * indentDepth) + d.ToString());
}
public static string GetAssertText(DiagnosticDescription[] expected, IEnumerable <Diagnostic> actual)
{
const int CSharp = 1;
const int VisualBasic = 2;
var language = actual.Any() && actual.First().Id.StartsWith("CS", StringComparison.Ordinal) ? CSharp : VisualBasic;
var includeDiagnosticMessagesAsComments = (language == CSharp);
int indentDepth = (language == CSharp) ? 4 : 1;
if (IsSortedOrEmpty(expected))
{
// If this is a new test (empty expectations) or a test that's already sorted,
// we sort the actual diagnostics to minimize diff noise as diagnostics change.
actual = Sort(actual);
}
var assertText = new StringBuilder();
assertText.AppendLine();
// write out the error baseline as method calls
int i;
assertText.AppendLine("Expected:");
var expectedText = ArrayBuilder <string> .GetInstance();
foreach (var d in expected)
{
expectedText.Add(GetDiagnosticDescription(d, indentDepth));
}
GetCommaSeparatedLines(assertText, expectedText);
// write out the actual results as method calls (copy/paste this to update baseline)
assertText.AppendLine("Actual:");
var actualText = ArrayBuilder <string> .GetInstance();
var e = actual.GetEnumerator();
for (i = 0; e.MoveNext(); i++)
{
Diagnostic d = e.Current;
string message = d.ToString();
if (Regex.Match(message, @"{\d+}").Success)
{
Assert.True(false, "Diagnostic messages should never contain unsubstituted placeholders.\n " + message);
}
if (i > 0)
{
assertText.AppendLine(",");
}
if (includeDiagnosticMessagesAsComments)
{
Indent(assertText, indentDepth);
assertText.Append("// ");
assertText.AppendLine(d.ToString());
var l = d.Location;
if (l.IsInSource)
{
Indent(assertText, indentDepth);
assertText.Append("// ");
assertText.AppendLine(l.SourceTree.GetText().Lines.GetLineFromPosition(l.SourceSpan.Start).ToString());
}
}
var description = new DiagnosticDescription(d, errorCodeOnly: false);
var diffDescription = description;
var idx = Array.IndexOf(expected, description);
if (idx != -1)
{
diffDescription = expected[idx];
}
assertText.Append(GetDiagnosticDescription(description, indentDepth));
actualText.Add(GetDiagnosticDescription(diffDescription, indentDepth));
}
if (i > 0)
{
assertText.AppendLine();
}
assertText.AppendLine("Diff:");
assertText.Append(DiffUtil.DiffReport(expectedText, actualText, separator: Environment.NewLine));
actualText.Free();
expectedText.Free();
return(assertText.ToString());
}
