Issue 25538. Fix for 'analysis.implemented' notification and private members.

pkg/analysis_server/test/analysis/notification_implemented_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.notification.implemented;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/constants.dart';
@@ skipping 258 matching lines @@
 class B extends A {
 }
 class C extends A {
   m() {}
 }
 ''');
     await prepareImplementedElements();
     assertHasImplementedMember('m() {} // A');
   }
 
+  test_method_withMethod_private_differentLib() async {
+    addFile(
+        '$testFolder/lib.dart',
+        r'''
+import 'test.dart';
+class B extends A {
+  void _m() {}
+}
+''');
+    addTestFile('''
+class A {
+  _m() {} // A
+}
+''');
+    await prepareImplementedElements();
+    assertNoImplementedMember('_m() {} // A');
+  }
+
+  test_method_withMethod_private_sameLibrary() async {
+    addTestFile('''
+class A {
+  _m() {} // A
+}
+class B extends A {
+  _m() {} // B
+}
+''');
+    await prepareImplementedElements();
+    assertHasImplementedMember('_m() {} // A');
+    assertNoImplementedMember('_m() {} // B');
+  }
+
   test_method_withMethod_wasAbstract() async {
     addTestFile('''
 abstract class A {
   m(); // A
 }
 class B extends A {
   m() {}
 }
 ''');
     await prepareImplementedElements();
@@ skipping 108 matching lines @@
     Future waitForNotification(int times) {
       if (times == 0 || implementedClasses != null) {
         return new Future.value();
       }
       return new Future.delayed(
           new Duration(milliseconds: 1), () => waitForNotification(times - 1));
     }
     return waitForNotification(30000);
   }
 }