pkg/polymer[_expressions] unittest fixes

pkg/polymer/lib/src/build/script_compactor.dart

 // Copyright (c) 2013, 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.
 
 /// Transfomer that combines multiple dart script tags into a single one.
 library polymer.src.build.script_compactor;
 
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:html5lib/dom.dart' show Document, Element, Text;
 import 'package:html5lib/dom_parsing.dart';
 import 'package:html5lib/parser.dart' show parseFragment;
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart' hide Element;
 import 'package:analyzer/src/generated/element.dart' as analyzer show Element;
 import 'package:barback/barback.dart';
-import 'package:code_transformers/assets.dart';
 import 'package:path/path.dart' as path;
 import 'package:source_maps/span.dart' show SourceFile;
 import 'package:smoke/codegen/generator.dart';
 import 'package:smoke/codegen/recorder.dart';
 import 'package:code_transformers/resolver.dart';
 import 'package:code_transformers/src/dart_sdk.dart';
 import 'package:template_binding/src/mustache_tokens.dart' show MustacheTokens;
 
 import 'package:polymer_expressions/expression.dart' as pe;
 import 'package:polymer_expressions/parser.dart' as pe;
@@ skipping 535 matching lines @@
     bool isWhole = length == 1 && tokens.getText(length) == '' &&
         tokens.getText(0) == '';
     var expressions = new List(length);
     for (int i = 0; i < length; i++) {
       expressions[i] = tokens.getPrepareBinding(i)();
     }
     return new _Mustaches(isWhole, expressions);
   }
 }
 
-/// Holds types that are used in queries 
+/// Holds types that are used in queries
 class _ResolvedTypes {
   /// Element representing `HtmlElement`.
   final ClassElement htmlElementElement;
 
   /// Element representing `String`.
   final InterfaceType stringType;
 
   /// Element representing `Polymer`.
   final ClassElement polymerClassElement;
 
@@ skipping 103 matching lines @@
   for (var c in combinators) {
     if (c is ShowElementCombinator) {
       var show = c.shownNames.toSet();
       elements.retainWhere((e) => show.contains(e.displayName));
     } else if (c is HideElementCombinator) {
       var hide = c.hiddenNames.toSet();
       elements.removeWhere((e) => hide.contains(e.displayName));
     }
   }
 }