Replace 'length' with more generic 'extractProperty' operation.

pkg/analyzer/test/src/summary/resynthesize_test.dart

Index: pkg/analyzer/test/src/summary/resynthesize_test.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_test.dart b/pkg/analyzer/test/src/summary/resynthesize_test.dart
index dc8fd6d7f06efddcb450402dcba5449da3e48734..3c8d284fda9cbd4d8eb034d1cd4e84808876abdc 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_test.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_test.dart
@@ -480,6 +480,15 @@ abstract class ResynthesizeTest extends AbstractSingleUnitTest {
           fail('Prefix of type ${o.prefix.staticElement.runtimeType} should not'
               ' have been elided');
         }
+      } else if (o is SimpleIdentifier && r is PrefixedIdentifier) {
+        // In 'class C {static const a = 0; static const b = a;}' the reference
+        // to 'a' in 'b' is serialized as a fully qualified 'C.a' reference.
+        if (r.prefix.staticElement is ClassElement) {
+          compareConstAsts(r.identifier, o, desc);

[Paul Berry, 2016/04/04 15:51:25]

Please add a check to verify that r.prefix.staticElement points to the correct
class.

+        } else {
+          fail('Prefix of type ${r.prefix.staticElement.runtimeType} should not'
+              ' have been elided');
+        }
       } else if (o is PropertyAccess &&
           o.target is PrefixedIdentifier &&
           r is PrefixedIdentifier) {