Serialize erroneous element and more

tests/compiler/dart2js/serialization/test_helper.dart

Index: tests/compiler/dart2js/serialization/test_helper.dart
diff --git a/tests/compiler/dart2js/serialization/test_helper.dart b/tests/compiler/dart2js/serialization/test_helper.dart
index a6dddf9069ac5b48367379cf54cf08f932aca978..9d3115f51e35ca794c3b51d5132d6968d835b442 100644
--- a/tests/compiler/dart2js/serialization/test_helper.dart
+++ b/tests/compiler/dart2js/serialization/test_helper.dart
@@ -553,3 +553,39 @@ void checkMaps(
     print(message);
   }
 }
+
+void checkAllResolvedAsts(
+    Compiler compiler1,
+    Compiler compiler2,
+    {bool verbose: false}) {
+  checkLoadedLibraryMembers(
+      compiler1,
+      compiler2,
+      (Element member1) {
+        return member1 is ExecutableElement &&
+            compiler1.resolution.hasResolvedAst(member1);
+      },
+      checkResolvedAsts,
+      verbose: verbose);
+}
+
+
+/// Check equivalence of [impact1] and [impact2].
+void checkResolvedAsts(Compiler compiler1, Element member1,
+    Compiler compiler2, Element member2,
+    {bool verbose: false}) {
+  if (!compiler2.serialization.isDeserialized(member2)) {
+    return;
+  }
+  ResolvedAst resolvedAst1 = compiler1.resolution.getResolvedAst(member1);
+  ResolvedAst resolvedAst2 = compiler2.serialization.getResolvedAst(member2);
+
+  if (resolvedAst1 == null || resolvedAst2 == null) return;
+
+  if (verbose) {
+    print('Checking resolved asts for $member1 vs $member2');
+  }
+
+  testResolvedAstEquivalence(
+      resolvedAst1, resolvedAst2, const CheckStrategy());
+}