Code transformers fixes for latest analyzer update

pkg/code_transformers/test/resolver_test.dart

 // Copyright (c) 2014, 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 code_transformers.test.resolver_test;
 
 import 'dart:async';
 
 import 'package:barback/barback.dart';
 import 'package:code_transformers/resolver.dart';
 import 'package:code_transformers/tests.dart';
 import 'package:unittest/compact_vm_config.dart';
 import 'package:unittest/unittest.dart';
 
 main() {
   useCompactVMConfiguration();
   var entryPoint = new AssetId('a', 'web/main.dart');
   var resolvers = new Resolvers(testingDartSdkDirectory);
 
-  Future validateResolver({Map<String, String> inputs, void validator(Resolver),
+  Future validateResolver({Map<String, String> inputs, validator(Resolver),
       List<String> messages: const[]}) {
     return applyTransformers(
           [[new TestTransformer(resolvers, entryPoint, validator)]],
           inputs: inputs,
           messages: messages);
   }
 
   group('Resolver', () {
 
     test('should handle empty files', () {
@@ skipping 80 matching lines @@
               ''',
           },
           validator: (resolver) {
             var lib = resolver.getLibrary(entryPoint);
             expect(lib.importedLibraries.length, 2);
             var libB = lib.importedLibraries.where((l) => l.name == 'b').single;
             expect(libB.getType('Foo'), isNull);
           });
     });
 
+    test('handles missing files', () {
+      return validateResolver(
+          inputs: {
+            'a|web/main.dart': '''
+              import 'package:b/missing.dart';
+
+              main() {
+              } ''',
+          },
+          validator: (resolver) {
+            var lib = resolver.getLibrary(entryPoint);
+            expect(lib.importedLibraries.length, 1);
+          });
+    });
+
     test('should update on changed package imports', () {
       return validateResolver(
           inputs: {
             'a|web/main.dart': '''
-              import 'package:b/b.dart';
+              import 'package:b/missing.dart';
 
               main() {
               } ''',
-            'b|lib/b.dart': '''
+            'b|lib/missing.dart': '''
               library b;
               class Bar {}
               ''',
           },
           validator: (resolver) {
             var lib = resolver.getLibrary(entryPoint);
             expect(lib.importedLibraries.length, 2);
             var libB = lib.importedLibraries.where((l) => l.name == 'b').single;
             expect(libB.getType('Bar'), isNotNull);
           });
     });
 
     test('should handle deleted files', () {
       return validateResolver(
           inputs: {
             'a|web/main.dart': '''
-              import 'package:b/b.dart';
+              import 'package:b/missing.dart';
 
               main() {
               } ''',
           },
-          messages: [
-            'error: Unable to find asset for "package:b/b.dart"',
-          ],
           validator: (resolver) {
             var lib = resolver.getLibrary(entryPoint);
             expect(lib.importedLibraries.length, 1);
           });
     });
 
     test('should fail on absolute URIs', () {
       return validateResolver(
           inputs: {
             'a|web/main.dart': '''
               import '/b.dart';
 
               main() {
               } ''',
           },
           messages: [
             // First from the AST walker
             'error: absolute paths not allowed: "/b.dart" (web/main.dart 0 14)',
-            // Then two from the resolver.
             'error: absolute paths not allowed: "/b.dart"',
+            // TODO: remove this when analyzer is updated.
             'error: absolute paths not allowed: "/b.dart"',
           ],
           validator: (resolver) {
             var lib = resolver.getLibrary(entryPoint);
             expect(lib.importedLibraries.length, 1);
           });
     });
 
     test('should list all libraries', () {
       return validateResolver(
@@ skipping 155 matching lines @@
   final AssetId primary;
   final Function validator;
 
   TestTransformer(Resolvers resolvers, this.primary, this.validator) {
     this.resolvers = resolvers;
   }
 
   Future<bool> isPrimary(Asset input) =>
       new Future.value(input.id == primary);
 
-  applyResolver(Transform transform, Resolver resolver) {
-    return validator(resolver);
-  }
+  applyResolver(Transform transform, Resolver resolver) => validator(resolver);
 }