Add comment to mock-compiler.

tests/compiler/dart2js/mock_compiler.dart

 // Copyright (c) 2012, 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.
 
 #library('mock_compiler');
 
 #import("dart:uri");
 
 #import("../../../lib/compiler/implementation/elements/elements.dart");
 #import("../../../lib/compiler/implementation/leg.dart");
@@ skipping 78 matching lines @@
               enableConcreteTypeInference: enableConcreteTypeInference) {
     coreLibrary = createLibrary("core", coreSource);
     // We need to set the assert method to avoid calls with a 'null'
     // target being interpreted as a call to assert.
     jsHelperLibrary = createLibrary("helper", helperSource);
     assertMethod = jsHelperLibrary.find(buildSourceString('assert'));
     interceptorsLibrary = createLibrary("interceptors", interceptorsSource);
 
     mainApp = mockLibrary(this, "");
     initializeSpecialClasses();
+    // We need to make sure the Object class is resolved. When registering a
+    // dynamic invocation the ArgumentTypesRegistry eventually iterates over

[ahe, 2012/10/18 16:42:30]

In that case, the ArgumentTypesRegistry registry should really make sure that
objectClass is resolved.

[floitsch, 2012/10/18 17:16:50]

Should I file a bug?

[ahe, 2012/10/22 16:50:08]

Yes, that would be great!

+    // the interfaces of the Object class which would be 'null' if the class
+    // wasn't resolved.
     objectClass.ensureResolved(this);
   }
 
   /**
    * Used internally to create a library from a source text. The created library
    * is fixed to export its top-level declarations.
    */
   LibraryElement createLibrary(String name, String source) {
     Uri uri = new Uri.fromComponents(scheme: "source", path: name);
     var script = new Script(uri, new MockFile(source));
@@ skipping 117 matching lines @@
     });
   }
 }
 
 LibraryElement mockLibrary(Compiler compiler, String source) {
   Uri uri = new Uri.fromComponents(scheme: "source");
   var library = new LibraryElement(new Script(uri, new MockFile(source)));
   importLibrary(library, compiler.coreLibrary, compiler);
   return library;
 }