public void NpmError()
{
const String npmWarnMessage = "npm ERR! 404 Not Found\r\n";
var span = Utils.CreateSpan(npmWarnMessage);
var classifier = CreateClassifier();
var result = classifier.GetClassificationSpans(span);
Assert.AreEqual(1, result.Count);
var classificationSpan = result.Single();
Assert.AreEqual(new SnapshotSpan(span.Snapshot, 9, 13), classificationSpan.Span);
Assert.AreEqual(ClassificationType.NpmMessageError, classificationSpan.ClassificationType.Classification);
}