cleanup test status

frog/world.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /** The one true [World]. */
 World world;
 
 /**
  * Should be called exactly once to setup singleton world.
  * Can use world.reset() to reinitialize.
@@ skipping 307 matching lines @@
       return new SourceFile(filename, '');
     }
   }
 
   Library getOrAddLibrary(String filename) {
     Library library = libraries[filename];
 
     if (library == null) {
       library = new Library(readFile(filename));
       info('read library ${filename}');
-      if (!library.isCore) {
+      if (!library.isCore &&
+          !library.imports.some((li) => li.library.isCore)) {
         library.imports.add(new LibraryImport(corelib));
       }
       libraries[filename] = library;
       _todo.add(library);
     }
     return library;
   }
 
   process() {
     while (_todo.length > 0) {
       final todo = _todo;
       _todo = [];
       for (var lib in todo) {
-        // TODO(jimhug): I don't like such active constructors.
-        new LibraryVisitor(lib);
+        lib.visitSources();
       }
     }
   }
 
   Library processScript(String filename) {
     Library library = getOrAddLibrary(filename);
     process();
     return library;
   }
 
@@ skipping 75 matching lines @@
 
   withTiming(String name, f()) {
     final sw = new StopWatch();
     sw.start();
     var result = f();
     sw.stop();
     info('$name in ${sw.elapsedInMs()}msec');
     return result;
   }
 }