Make int and double nullable by default

lib/src/testing.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 ddc.src.testing;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart' show TimestampedData;
 import 'package:analyzer/src/generated/source.dart';
 import 'package:logging/logging.dart';
 import 'package:path/path.dart' as path;
 import 'package:source_span/source_span.dart';
 import 'package:unittest/unittest.dart';
 
 import 'package:dev_compiler/src/checker/dart_sdk.dart'
     show mockSdkSources, dartSdkDirectory;
 import 'package:dev_compiler/src/checker/resolver.dart' show TypeResolver;
 import 'package:dev_compiler/src/utils.dart';
 import 'package:dev_compiler/src/info.dart';
 import 'package:dev_compiler/src/options.dart';
 import 'package:dev_compiler/src/report.dart';
+import 'package:dev_compiler/config.dart';
 import 'package:dev_compiler/devc.dart' show compile;
 
 /// Run the checker on a program with files contents as indicated in
 /// [testFiles].
 ///
 /// This function makes several assumptions to make it easier to describe error
 /// expectations:
 ///
 ///   * a file named `/main.dart` exists in [testFiles].
 ///   * all expected failures are listed in the source code using comments
 ///   immediately in front of the AST node that should contain the error.
 ///   * errors are formatted as a token `level:Type`, where `level` is the
 ///   logging level were the error would be reported at, and `Type` is the
 ///   concrete subclass of [StaticInfo] that denotes the error.
 ///
 /// For example, to check that an assignment produces a warning about a boxing
 /// conversion, you can describe the test as follows:
 ///
 ///     testChecker({
 ///       '/main.dart': '''
 ///           testMethod() {
 ///             dynamic x = /*warning:Box*/3;
 ///           }
 ///       '''
 ///     });
 ///
 CheckerResults testChecker(Map<String, String> testFiles,
     {bool allowConstCasts: true, String sdkDir, CheckerReporter reporter,
     covariantGenerics: true, relaxedCasts: true, inferFromOverrides: true,
-    inferStaticsFromIdentifiers: false, inferInNonStableOrder: false}) {
+    inferStaticsFromIdentifiers: false, inferInNonStableOrder: false,
+    nonnullableTypes: TypeOptions.NONNULLABLE_TYPES}) {
   expect(testFiles.containsKey('/main.dart'), isTrue,
       reason: '`/main.dart` is missing in testFiles');
 
   // Create a resolver that can load test files from memory.
   var testUriResolver = new _TestUriResolver(testFiles);
   var options = new CompilerOptions(
       allowConstCasts: allowConstCasts,
       covariantGenerics: covariantGenerics,
       relaxedCasts: relaxedCasts,
       inferFromOverrides: inferFromOverrides,
       inferStaticsFromIdentifiers: inferStaticsFromIdentifiers,
-      inferInNonStableOrder: inferInNonStableOrder);
+      inferInNonStableOrder: inferInNonStableOrder,
+      nonnullableTypes: nonnullableTypes);
   var resolver = sdkDir == null
       ? new TypeResolver.fromMock(mockSdkSources, options,
           otherResolvers: [testUriResolver])
       : new TypeResolver.fromDir(sdkDir, options,
           otherResolvers: [testUriResolver]);
 
   // Run the checker on /main.dart.
   var mainFile = new Uri.file('/main.dart');
   var checkExpectations = reporter == null;
   if (reporter == null) reporter = new TestReporter();
@@ skipping 230 matching lines @@
 
   SourceSpan spanFor(AstNode node) {
     final begin = node is AnnotatedNode
         ? node.firstTokenAfterCommentAndMetadata.offset
         : node.offset;
     return _file.span(begin, node.end);
   }
 
   String toString() => '[$runtimeType: $uri]';
 }