Support for excluded files/folders.

pkg/analyzer/test/file_system/memory_file_system_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 test.memory_file_system;
 
 import 'dart:async';
 
 import 'package:analyzer/src/generated/engine.dart' show TimestampedData;
 import 'package:analyzer/src/generated/source.dart';
@@ skipping 242 matching lines @@
       });
 
       test('hashCode', () {
         String path = '/foo/bar/file.txt';
         File file1 = provider.getResource(path);
         provider.newFile(path, 'contents');
         File file2 = provider.getResource(path);
         expect(file1.hashCode, equals(file2.hashCode));
       });
 
+      test('isOrContains', () {
+        String path = '/foo/bar/file.txt';
+        File file = provider.getResource(path);
+        expect(file.isOrContains(path), isTrue);
+        expect(file.isOrContains('/foo/bar'), isFalse);
+      });
+
       test('shortName', () {
         File file = provider.getResource('/foo/bar/file.txt');
         expect(file.shortName, 'file.txt');
       });
 
       test('toString', () {
         File file = provider.getResource('/foo/bar/file.txt');
         expect(file.toString(), '/foo/bar/file.txt');
       });
 
@@ skipping 30 matching lines @@
         expect(folder == folder2, isFalse);
       });
 
       test('contains', () {
         expect(folder.contains('/foo/bar/aaa.txt'), isTrue);
         expect(folder.contains('/foo/bar/aaa/bbb.txt'), isTrue);
         expect(folder.contains('/baz.txt'), isFalse);
         expect(folder.contains('/foo/bar'), isFalse);
       });
 
+      test('isOrContains', () {
+        expect(folder.isOrContains('/foo/bar'), isTrue);
+        expect(folder.isOrContains('/foo/bar/aaa.txt'), isTrue);
+        expect(folder.isOrContains('/foo/bar/aaa/bbb.txt'), isTrue);
+        expect(folder.isOrContains('/baz.txt'), isFalse);
+      });
+
       group('getChild', () {
         test('does not exist', () {
           File file = folder.getChild('file.txt');
           expect(file, isNotNull);
           expect(file.exists, isFalse);
         });
 
         test('file', () {
           provider.newFile('/foo/bar/file.txt', 'content');
           File child = folder.getChild('file.txt');
@@ skipping 153 matching lines @@
         });
 
         test('resolveRelative', () {
           Uri relative = source.resolveRelativeUri(new Uri.file('bar/baz.dart'));
           expect(relative.path, '/foo/bar/baz.dart');
         });
       });
     });
   });
 }