Code clean-up

pkg/analyzer/test/generated/source_factory_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 analyzer.test.generated.test.generated.source_factory;
 
 import 'dart:convert';
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/physical_file_system.dart';
@@ skipping 128 matching lines @@
           String uri = resolvePackageUri(config: '', uri: 'package:foo');
           expect(uri, isNull);
         });
         test('Invalid URI', () {
           // TODO(pquitslund): fix clients to handle errors appropriately
           //   CLI: print message 'invalid package file format'
           //   SERVER: best case tell user somehow and recover...
           expect(
               () => resolvePackageUri(
                   config: 'foo:<:&%>', uri: 'package:foo/bar.dart'),
-              throwsA(new isInstanceOf('FormatException')));
+              throwsA(new isInstanceOf<FormatException>()));
         });
         test('Valid URI that cannot be further resolved', () {
           String uri = resolvePackageUri(
               config: 'foo:http://www.google.com', uri: 'package:foo/bar.dart');
           expect(uri, isNull);
         });
         test('Relative URIs', () {
           Source containingSource = createSource(
               path: '/foo/bar/baz/foo.dart', uri: 'package:foo/foo.dart');
           String uri = resolvePackageUri(
@@ skipping 200 matching lines @@
   UriResolver_SourceFactoryTest_test_fromEncoding_valid(this.encoding);
 
   @override
   Source resolveAbsolute(Uri uri, [Uri actualUri]) {
     if (uri.toString() == encoding) {
       return new TestSource();
     }
     return null;
   }
 }