don't try to get user defined compilation arguments for the mocks

Author: WaynePhillipsEA

Rubberduck.Parsing/Preprocessing/VBAPreprocessor.cs

@@ -36,6 +36,9 @@ public void PreprocessTokenStream(IVBProject project, string moduleName, CommonT
 
         public Dictionary<string, short> GetUserDefinedCompilationArguments(IVBProject project)
         {
+            // for the mocks, just return an empty dictionary for now
+            if (project == null) return new Dictionary<string, short>();
+
             // use the TypeLib API to grab the user defined compilation arguments.  must be obtained on the main thread.
             var providerInst = UiContextProvider.Instance();
             var task = (new UiDispatcher(providerInst)).StartTask(delegate () {

RubberduckTests/Mocks/TestAttributeParser.cs

@@ -35,7 +35,7 @@ public TestAttributeParser(Func<IVBAPreprocessor> preprocessorFactory, IProjects
             var tokens = tokenStreamProvider.Tokens(code);
             var preprocessor = _preprocessorFactory();
             var preprocessingErrorListener = new PreprocessorExceptionErrorListener(module.ComponentName, ParsePass.AttributesPass);
-            preprocessor.PreprocessTokenStream(component.ParentProject, module.ComponentName, tokens, preprocessingErrorListener, cancellationToken);
+            preprocessor.PreprocessTokenStream(null, module.ComponentName, tokens, preprocessingErrorListener, cancellationToken);
             var listener = new AttributeListener(Tuple.Create(module.ComponentName, type));
             // parse tree isn't usable for declarations because
             // line numbers are offset due to module header and attributes