Add package root support to analysis server.

pkg/analysis_server/test/integration/analysis/package_root.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.integration.analysis.packageRoot;
+
+import 'package:analysis_server/src/protocol.dart';
+import 'package:path/path.dart';
+import 'package:unittest/unittest.dart';
+
+import '../../reflective_tests.dart';
+import '../integration_tests.dart';
+
+@ReflectiveTestCase()
+class Test extends AbstractAnalysisServerIntegrationTest {
+  test_package_root() {
+    String projPath = sourcePath('project');
+    String mainPath = join(projPath, 'main.dart');
+    String packagesPath = sourcePath('packages');
+    String fooBarPath = join(packagesPath, 'foo', 'bar.dart');
+    String mainText = """
+library main;
+
+import 'package:foo/bar.dart'
+
+main() {
+  f();
+}
+""";
+    String fooBarText = """
+library foo.bar;
+
+f() {}
+""";
+    writeFile(mainPath, mainText);
+    String normalizedFooBarPath = writeFile(fooBarPath, fooBarText);
+    sendServerSetSubscriptions([ServerService.STATUS]);
+    sendAnalysisSetSubscriptions({AnalysisService.NAVIGATION: [mainPath]});
+    List<NavigationRegion> navigationRegions;
+    onAnalysisNavigation.listen((AnalysisNavigationParams params) {
+      expect(params.file, equals(mainPath));
+      navigationRegions = params.regions;
+    });
+    sendAnalysisSetAnalysisRoots([projPath], [],
+        packageRoots: {projPath: packagesPath});
+    return analysisFinished.then((_) {
+      // Verify that fooBarPath was properly resolved by checking that f()
+      // refers to it.
+      bool found = false;
+      for (NavigationRegion region in navigationRegions) {
+        String navigationSource =
+            mainText.substring(region.offset, region.offset + region.length);
+        if (navigationSource == 'f') {
+          found = true;
+          expect(region.targets, hasLength(1));
+          Location location = region.targets[0].location;
+          expect(location.file, equals(normalizedFooBarPath));
+        }
+      }
+      expect(found, isTrue);
+    });
+  }
+}
+
+main() {
+  runReflectiveTests(Test);
+}