Extend testing of metadata.

dart/tests/compiler/dart2js/compiler_helper.dart

Index: dart/tests/compiler/dart2js/compiler_helper.dart
diff --git a/dart/tests/compiler/dart2js/compiler_helper.dart b/dart/tests/compiler/dart2js/compiler_helper.dart
index 02d38465a3abad01d99ec15e92c13d20aa77e055..1c8751821ba5fd6a559dbfda518a09d19474193e 100644
--- a/dart/tests/compiler/dart2js/compiler_helper.dart
+++ b/dart/tests/compiler/dart2js/compiler_helper.dart
@@ -6,13 +6,16 @@
 #library("compiler_helper");
 
 #import("dart:uri");
-#import("../../../lib/compiler/implementation/leg.dart", prefix: "leg");
-#import("../../../lib/compiler/implementation/js_backend/js_backend.dart", prefix: "js");
+
 #import("../../../lib/compiler/implementation/elements/elements.dart", prefix: "lego");
-#import('../../../lib/compiler/implementation/source_file.dart');
+#import("../../../lib/compiler/implementation/js_backend/js_backend.dart", prefix: "js");
+#import("../../../lib/compiler/implementation/leg.dart", prefix: "leg");
 #import("../../../lib/compiler/implementation/ssa/ssa.dart", prefix: "ssa");
-#import("parser_helper.dart");
+#import("../../../lib/compiler/implementation/util/util.dart");
+#import('../../../lib/compiler/implementation/source_file.dart');
+
 #import("mock_compiler.dart");
+#import("parser_helper.dart");
 
 String compile(String code, [String entry = 'main']) {
   MockCompiler compiler = new MockCompiler();
@@ -86,3 +89,5 @@ void compileAndDoNotMatch(String code, String entry, RegExp regexp) {
   Expect.isFalse(regexp.hasMatch(generated),
                  '"$generated" has a match in /$regexp/');
 }
+
+int length(Link link) => link.isEmpty() ? 0 : length(link.tail) + 1;