Serialize and resynthesize variable initializers.

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

 // Copyright (c) 2015, 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 test.src.serialization.elements_test;
 
 import 'dart:convert';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 847 matching lines @@
     compareElements(resynthesized, original, desc);
     expect(resynthesized.uri, original.uri);
     expect(resynthesized.uriOffset, original.uriOffset, reason: desc);
     expect(resynthesized.uriEnd, original.uriEnd, reason: desc);
   }
 
   void compareVariableElements(
       VariableElement resynthesized, VariableElement original, String desc) {
     compareElements(resynthesized, original, desc);
     compareTypes(resynthesized.type, original.type, desc);
+    if (original is! Member) {

[Paul Berry, 2016/02/17 21:15:30]

Again, why should we skip this code if original is Member?

[scheglov, 2016/02/17 21:27:51]

I've added the explanation comment.

+      compareVariableInitializers(
+          resynthesized.initializer, original.initializer, desc);
+    }
     VariableElementImpl originalActual = getActualElement(original, desc);
     if (originalActual is ConstVariableElement) {
       VariableElementImpl resynthesizedActual =
           getActualElement(resynthesized, desc);
       Expression initializer = resynthesizedActual.constantInitializer;
       if (constantInitializersAreInvalid) {
         _assertUnresolvedIdentifier(initializer, desc);
       } else {
         compareConstAsts(initializer, originalActual.constantInitializer,
             '$desc initializer');
       }
     }
     checkPossibleMember(resynthesized, original, desc);
     checkPossibleLocalElements(resynthesized, original);
   }
 
+  void compareVariableInitializers(
+      FunctionElement resynthesized, FunctionElement original, String desc) {
+    if (original == null && resynthesized == null) {
+      return;
+    }
+    expect(resynthesized, isNotNull, reason: desc);
+    expect(resynthesized.nameOffset, original.nameOffset, reason: desc);
+    expect(resynthesized.name, original.name, reason: desc);
+    // TODO(scheglov) replace this method with compareFunctionElements()
+    // once we resynthesize initializers return types.
+  }
+
   /**
    * Serialize the given [library] into a summary.  Then create a
    * [_TestSummaryResynthesizer] which can deserialize it, along with any
    * references it makes to `dart:core`.
    *
    * Errors will lead to a test failure unless [allowErrors] is `true`.
    */
   _TestSummaryResynthesizer encodeLibrary(LibraryElementImpl library,
       {bool allowErrors: false, bool dumpSummaries: false}) {
     if (!allowErrors) {
@@ skipping 2784 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }