Issue 24599. Fix for requesting navigation for directives.

pkg/analysis_server/test/analysis/get_navigation_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.analysis.get_navigation;
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/domain_analysis.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
@@ skipping 40 matching lines @@
     addFile(
         file,
         '''
 main() {
   print(42);
 }
 ''');
     return _checkInvalid(file, -1, -1);
   }
 
+  test_issue24599_importDirective() async {
+    addTestFile('''
+import 'dart:math';
+
+main() {
+}''');
+    await waitForTasksFinished();
+    await _getNavigation(testFile, 0, 17);
+    expect(regions, hasLength(1));
+    assertHasRegionString("'dart:math'");
+    expect(testTargets, hasLength(1));
+    expect(testTargets[0].kind, ElementKind.LIBRARY);
+  }
+
+  test_issue24599_importKeyword() async {
+    addTestFile('''
+import 'dart:math';
+
+main() {
+}''');
+    await waitForTasksFinished();
+    await _getNavigation(testFile, 0, 1);
+    expect(regions, hasLength(1));
+    assertHasRegionString("'dart:math'");
+    expect(testTargets, hasLength(1));
+    expect(testTargets[0].kind, ElementKind.LIBRARY);
+  }
+
+  test_issue24599_importUri() async {
+    addTestFile('''
+import 'dart:math';
+
+main() {
+}''');
+    await waitForTasksFinished();
+    await _getNavigation(testFile, 7, 11);
+    expect(regions, hasLength(1));
+    assertHasRegionString("'dart:math'");
+    expect(testTargets, hasLength(1));
+    expect(testTargets[0].kind, ElementKind.LIBRARY);
+  }
+
   test_multipleRegions() async {
     addTestFile('''
 main() {
   var aaa = 1;
   var bbb = 2;
   var ccc = 3;
   var ddd = 4;
   print(aaa + bbb + ccc + ddd);
 }
 ''');
@@ skipping 80 matching lines @@
   _getNavigation(String file, int offset, int length) async {
     Request request = _createGetNavigationRequest(file, offset, length);
     Response response = await serverChannel.sendRequest(request);
     AnalysisGetNavigationResult result =
         new AnalysisGetNavigationResult.fromResponse(response);
     targetFiles = result.files;
     targets = result.targets;
     regions = result.regions;
   }
 }