The very first bits of resynthesizing elements from kernels.

pkg/analyzer/test/src/summary/resynthesize_common.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:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
@@ skipping 1344 matching lines @@
 abstract class ResynthesizeTest extends AbstractResynthesizeTest {
   Future<LibraryElementImpl> checkLibrary(String text,
       {bool allowErrors: false, bool dumpSummaries: false});
 
   /**
    * Return a [SummaryResynthesizer] to resynthesize the library with the
    * given [librarySource].
    */
   SummaryResynthesizer encodeDecodeLibrarySource(Source librarySource);
 
-  fail_library_hasExtUri() async {
-    var library = await checkLibrary('import "dart-ext:doesNotExist.dart";');
-    if (isStrongMode) {
-      checkElementText(
-          library,
-          r'''
-''');
-    } else {
-      checkElementText(
-          library,
-          r'''
-''');
-    }
-  }
-
   test_class_abstract() async {
     var library = await checkLibrary('abstract class C {}');
     if (isStrongMode) {
       checkElementText(
           library,
           r'''
 abstract class C {
 }
 ''');
     } else {
@@ skipping 7113 matching lines @@
           library,
           r'''
 import 'dart:async';
 const dynamic x =
         FutureOr/*location: dart:async;FutureOr*/;
 ''');
     }
     var variables = library.definingCompilationUnit.topLevelVariables;
     expect(variables, hasLength(1));
     var x = variables[0] as ConstTopLevelVariableElementImpl;
-    if (createOptions().strongMode) {
+    if (isStrongMode) {
       expect(x.type.toString(), 'Type');
     } else {
       expect(x.type.toString(), 'dynamic');
     }
     expect(x.constantInitializer.toString(), 'FutureOr');
   }
 
   test_futureOr_inferred() async {
     var library = await checkLibrary('''
 import "dart:async";
@@ skipping 6788 matching lines @@
       fail('Unexpectedly tried to get unlinked summary for $uri');
     }
     return serializedUnit;
   }
 
   @override
   bool hasLibrarySummary(String uri) {
     return true;
   }
 }