Use "pub list-package-dirs" to resolve package URIs in analysis server.

pkg/analysis_server/test/domain_analysis_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.domain.analysis;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
@@ skipping 14 matching lines @@
   runReflectiveTests(AnalysisDomainTest);
 
   MockServerChannel serverChannel;
   MemoryResourceProvider resourceProvider;
   AnalysisServer server;
   AnalysisDomainHandler handler;
 
   setUp(() {
     serverChannel = new MockServerChannel();
     resourceProvider = new MemoryResourceProvider();
-    server = new AnalysisServer(serverChannel, resourceProvider);
+    server = new AnalysisServer(
+        serverChannel, resourceProvider, new MockPackageMapProvider());
     server.defaultSdk = new MockSdk();
     handler = new AnalysisDomainHandler(server);
   });
 
   group('notification.errors', testNotificationErrors);
   group('updateContent', testUpdateContent);
   group('setSubscriptions', test_setSubscriptions);
 
   group('AnalysisDomainHandler', () {
     group('setAnalysisRoots', () {
@@ skipping 156 matching lines @@
   Map<String, List<AnalysisError>> filesErrors = {};
   Map<String, List<Map<String, Object>>> filesHighlights = {};
   Map<String, List<Map<String, Object>>> filesNavigation = {};
 
   String testFile = '/project/bin/test.dart';
   String testCode;
 
   AnalysisTestHelper() {
     serverChannel = new MockServerChannel();
     resourceProvider = new MemoryResourceProvider();
-    server = new AnalysisServer(serverChannel, resourceProvider);
+    server = new AnalysisServer(
+        serverChannel, resourceProvider, new MockPackageMapProvider());
     server.defaultSdk = new MockSdk();
     handler = new AnalysisDomainHandler(server);
     // listen for notifications
     Stream<Notification> notificationStream = serverChannel.notificationController.stream;
     notificationStream.listen((Notification notification) {
       if (notification.event == ANALYSIS_ERRORS) {
         String file = notification.getParameter(FILE);
         List<Map<String, Object>> errorMaps = notification.getParameter(ERRORS);
         filesErrors[file] = errorMaps.map(jsonToAnalysisError).toList();
       }
@@ skipping 339 matching lines @@
 
   void processNotification(Notification notification) {
     if (notification.event == ANALYSIS_ERRORS) {
       String file = notification.getParameter(FILE);
       List<Map<String, Object>> errorMaps = notification.getParameter(ERRORS);
       filesErrors[file] = errorMaps.map(jsonToAnalysisError).toList();
     }
   }
 
   test_setRoots_packages() {
-    // prepare project with 'packages' folder
-    String pkgFile = '/project/packages/pkgA/libA.dart';
+    // prepare package
+    String pkgFile = '/packages/pkgA/libA.dart';
     resourceProvider.newFile(pkgFile, '''
 library lib_a;
 class A {}
 ''');
+    packageMapProvider.packageMap['pkgA'] =
+        resourceProvider.getResource('/packages/pkgA');
     addTestFile('''
 import 'package:pkgA/libA.dart';
 main(A a) {
 }
 ''');
     // create project and wait for analysis
     createProject();
     return waitForTasksFinished().then((_) {
       // if 'package:pkgA/libA.dart' was resolved, then there are no errors
       expect(filesErrors[testFile], isEmpty);
       // packages file also was resolved
       expect(filesErrors[pkgFile], isEmpty);
     });
   }
 }