Implement type inference for asserts in constructor initializers.

pkg/analyzer/test/src/dart/analysis/base.dart

 // Copyright (c) 2016, 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.
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/visitor.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
@@ skipping 74 matching lines @@
         contentOverlay,
         null,
         new SourceFactory([
           new DartUriResolver(sdk),
           generatedUriResolver,
           new PackageMapUriResolver(provider, <String, List<Folder>>{
             'test': [provider.getFolder(testProject)]
           }),
           new ResourceUriResolver(provider)
         ], null, provider),
-        new AnalysisOptionsImpl()
-          ..strongMode = true
-          ..enableUriInPartOf = true,
+        createAnalysisOptions(),
         disableChangesAndCacheAllResults: disableChangesAndCacheAllResults,
         externalSummaries: externalSummaries);
   }
 
+  AnalysisOptionsImpl createAnalysisOptions() => new AnalysisOptionsImpl()
+    ..strongMode = true
+    ..enableUriInPartOf = true;
+
   int findOffset(String search) {
     int offset = testCode.indexOf(search);
     if (offset < 0) {
       fail("Did not find '$search' in\n$testCode");
     }
     return offset;
   }
 
   int getLeadingIdentifierLength(String search) {
     int length = 0;
@@ skipping 42 matching lines @@
 
   _ElementVisitorFunctionWrapper(this.function);
 
   visitElement(Element element) {
     function(element);
     super.visitElement(element);
   }
 }
 
 class _GeneratedUriResolverMock extends Mock implements UriResolver {}