Handle relative paths in the output of "pub list-package-dirs".

pkg/analysis_server/test/resource_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.resource;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/resource.dart';
 import 'package:analyzer/src/generated/engine.dart' show TimestampedData;
@@ skipping 311 matching lines @@
 
       test('parent', () {
         Resource parent1 = folder.parent;
         expect(parent1, new isInstanceOf<Folder>());
         expect(parent1.path, equals('/foo'));
         Resource parent2 = parent1.parent;
         expect(parent2, new isInstanceOf<Folder>());
         expect(parent2.path, equals('/'));
         expect(parent2.parent, isNull);
       });
+
+      test('canonicalizePath', () {
+        expect(folder.canonicalizePath('baz'), equals('/foo/bar/baz'));
+        expect(folder.canonicalizePath('/baz'), equals('/baz'));
+        expect(folder.canonicalizePath('../baz'), equals('/foo/baz'));
+        expect(folder.canonicalizePath('/a/b/../c'), equals('/a/c'));
+        expect(folder.canonicalizePath('./baz'), equals('/foo/bar/baz'));
+        expect(folder.canonicalizePath('/a/b/./c'), equals('/a/b/c'));
+      });
     });
 
     group('_MemoryFileSource', () {
       Source source;
 
       group('existent', () {
         setUp(() {
           File file = provider.newFile('/foo/test.dart', 'library test;');
           source = file.createSource(UriKind.FILE_URI);
         });
@@ skipping 144 matching lines @@
       expect(source, isNull);
     });
 
     test('not a file URI', () {
       var uri = new Uri(scheme: 'https', path: '127.0.0.1/test.dart');
       Source source = resolver.resolveAbsolute(uri);
       expect(source, isNull);
     });
   });
 }