Resynthesize some more types lazily.

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/constant/value.dart';
@@ skipping 204 matching lines @@
       ClassElement resynthesized, ClassElement original, String desc) {
     ClassElementImpl r = ClassElementImpl.getImpl(resynthesized);
     ClassElementImpl o = ClassElementImpl.getImpl(original);
     compareElements(r, o, desc);
     expect(r.fields.length, o.fields.length, reason: '$desc fields.length');
     for (int i = 0; i < r.fields.length; i++) {
       String name = o.fields[i].name;
       compareFieldElements(r.fields[i], o.fields[i], '$desc.field $name');
     }
     compareTypes(r.supertype, o.supertype, '$desc supertype');
-    expect(r.interfaces.length, o.interfaces.length);
+    expect(r.interfaces.length, o.interfaces.length,
+        reason: '$desc interfaces.length');
     for (int i = 0; i < r.interfaces.length; i++) {
       compareTypes(r.interfaces[i], o.interfaces[i],
           '$desc interface ${o.interfaces[i].name}');
     }
-    expect(r.mixins.length, o.mixins.length);
+    expect(r.mixins.length, o.mixins.length, reason: '$desc mixins.length');
     for (int i = 0; i < r.mixins.length; i++) {
       compareTypes(r.mixins[i], o.mixins[i], '$desc mixin ${o.mixins[i].name}');
     }
-    expect(r.typeParameters.length, o.typeParameters.length);
+    expect(r.typeParameters.length, o.typeParameters.length,
+        reason: '$desc typeParameters.length');
     for (int i = 0; i < r.typeParameters.length; i++) {
       compareTypeParameterElements(r.typeParameters[i], o.typeParameters[i],
           '$desc type parameter ${o.typeParameters[i].name}');
     }
     expect(r.constructors.length, o.constructors.length,
         reason: '$desc constructors.length');
     for (int i = 0; i < r.constructors.length; i++) {
       compareConstructorElements(r.constructors[i], o.constructors[i],
           '$desc constructor ${o.constructors[i].name}');
     }
-    expect(r.accessors.length, o.accessors.length);
+    expect(r.accessors.length, o.accessors.length,
+        reason: '$desc accessors.length');
     for (int i = 0; i < r.accessors.length; i++) {
       comparePropertyAccessorElements(r.accessors[i], o.accessors[i],
           '$desc accessor ${o.accessors[i].name}');
     }
-    expect(r.methods.length, o.methods.length);
+    expect(r.methods.length, o.methods.length, reason: '$desc methods.length');
     for (int i = 0; i < r.methods.length; i++) {
       compareMethodElements(
           r.methods[i], o.methods[i], '$desc.${o.methods[i].name}');
     }
     compareTypes(r.type, o.type, desc);
     expect(r.hasBeenInferred, o.hasBeenInferred, reason: desc);
   }
 
   void compareCompilationUnitElements(CompilationUnitElementImpl resynthesized,
       CompilationUnitElementImpl original) {
@@ skipping 4351 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }