Extension point for AnalysisResultListener(s).

pkg/analysis_server/test/plugin/set_analysis_domain_test.dart

Index: pkg/analysis_server/test/plugin/set_analysis_domain_test.dart
diff --git a/pkg/analysis_server/test/plugin/set_analysis_domain_test.dart b/pkg/analysis_server/test/plugin/set_analysis_domain_test.dart
new file mode 100644
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+++ b/pkg/analysis_server/test/plugin/set_analysis_domain_test.dart
@@ -0,0 +1,146 @@
+// 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.plugin.analysis_contributor;
+
+import 'dart:async';
+
+import 'package:analysis_server/analysis/analysis_domain.dart';
+import 'package:analysis_server/analysis/navigation/navigation_core.dart';
+import 'package:analysis_server/plugin/navigation.dart';
+import 'package:analysis_server/src/constants.dart';
+import 'package:analysis_server/src/protocol.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/task/dart.dart';
+import 'package:plugin/plugin.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+import 'package:unittest/unittest.dart';
+
+import '../analysis_abstract.dart';
+import '../utils.dart';
+
+main() {
+  initializeTestEnvironment();
+  if (AnalysisEngine.instance.useTaskModel) {
+    defineReflectiveTests(SetAnalysisDomainTest);
+  }
+}
+
+/**
+ * This test uses [SET_ANALYSIS_DOMAIN_EXTENSION_POINT_ID] and
+ * [NAVIGATION_CONTRIBUTOR_EXTENSION_POINT_ID] extension points to validate
+ * that plugins can listen for analysis and force sending navigation
+ * notifications.
+ */
+@reflectiveTest
+class SetAnalysisDomainTest extends AbstractAnalysisTest {
+  final Set<String> parsedUnitFiles = new Set<String>();
+  bool contributorMayAddRegion = false;
+
+  List<NavigationRegion> regions;
+  List<NavigationTarget> targets;
+  List<String> targetFiles;
+
+  @override
+  void addServerPlugins(List<Plugin> plugins) {
+    var plugin = new TestSetAnalysisDomainPlugin(this);
+    plugins.add(plugin);
+  }
+
+  @override
+  void processNotification(Notification notification) {
+    if (notification.event == ANALYSIS_NAVIGATION) {
+      var params = new AnalysisNavigationParams.fromNotification(notification);
+      // TODO(scheglov) we check for "params.regions.isNotEmpty" because
+      // normal, Dart only, navigation notifications are scheduled as
+      // operations, but plugins use "notificationSite.scheduleNavigation"
+      // which is not scheduled yet. So, it comes *before* the Dart one, and
+      // gets lost.
+      if (params.file == testFile && params.regions.isNotEmpty) {
+        regions = params.regions;
+        targets = params.targets;
+        targetFiles = params.files;
+      }
+    }
+  }
+
+  Future test_contributorIsInvoked() async {
+    createProject();
+    addAnalysisSubscription(AnalysisService.NAVIGATION, testFile);
+    addTestFile('// usually no navigation');
+    await server.onAnalysisComplete;
+    // we have PARSED_UNIT
+    expect(parsedUnitFiles, contains(testFile));
+    // we have an additional navigation region/target
+    expect(regions, hasLength(1));
+    {
+      NavigationRegion region = regions.single;
+      expect(region.offset, 1);
+      expect(region.length, 5);
+      expect(region.targets.single, 0);
+    }
+    {
+      NavigationTarget target = targets.single;
+      expect(target.fileIndex, 0);
+      expect(target.offset, 1);
+      expect(target.length, 2);
+      expect(target.startLine, 3);
+      expect(target.startColumn, 4);
+    }
+    expect(targetFiles.single, '/testLocation.dart');
+  }
+}
+
+class TestNavigationContributor implements NavigationContributor {
+  final SetAnalysisDomainTest test;
+
+  TestNavigationContributor(this.test);
+
+  @override
+  void computeNavigation(NavigationHolder holder, AnalysisContext context,
+      Source source, int offset, int length) {
+    if (test.contributorMayAddRegion) {
+      holder.addRegion(1, 5, ElementKind.CLASS,
+          new Location('/testLocation.dart', 1, 2, 3, 4));
+    }
+  }
+}
+
+class TestSetAnalysisDomainPlugin implements Plugin {
+  final SetAnalysisDomainTest test;
+
+  TestSetAnalysisDomainPlugin(this.test);
+
+  @override
+  String get uniqueIdentifier => 'test';
+
+  @override
+  void registerExtensionPoints(RegisterExtensionPoint register) {}
+
+  @override
+  void registerExtensions(RegisterExtension register) {
+    register(SET_ANALYSIS_DOMAIN_EXTENSION_POINT_ID, _setAnalysisDomain);
+    register(NAVIGATION_CONTRIBUTOR_EXTENSION_POINT_ID,
+        new TestNavigationContributor(test));
+  }
+
+  void _setAnalysisDomain(AnalysisDomain domain) {
+    domain.onResultComputed(PARSED_UNIT).listen((result) {
+      expect(result.context, isNotNull);
+      expect(result.target, isNotNull);
+      expect(result.value, isNotNull);
+      Source source = result.target.source;
+      test.parsedUnitFiles.add(source.fullName);
+      // let the navigation contributor to work
+      test.contributorMayAddRegion = true;
+      try {
+        domain.scheduleNotification(
+            result.context, source, AnalysisService.NAVIGATION);
+      } finally {
+        test.contributorMayAddRegion = false;
+      }
+    });
+  }
+}