Add a test for import-aware paste

pkg/analysis_server/test/src/computer/import_elements_computer_test.dart

 // Copyright (c) 2017, 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.
 
 import 'dart:async';
 
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/computer/import_elements_computer.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
@@ skipping 157 matching lines @@
     Source fooSource = addPackageSource('pkg', 'foo.dart', '');
     await createBuilder('''
 import 'package:pkg/foo.dart' show A;
 ''');
     await computeChanges(<ImportedElements>[
       new ImportedElements(fooSource.fullName, '', <String>['A'])
     ]);
     assertNoChanges();
   }
 
+  test_createEdits_importSelf() async {
+    await createBuilder('''
+class A {
+  A parent;
+}
+''');
+    await computeChanges(<ImportedElements>[
+      new ImportedElements(path, '', <String>['A'])
+    ]);
+    assertNoChanges();
+  }
+
   test_createEdits_noElements() async {
     await createBuilder('');
     await computeChanges(<ImportedElements>[]);
     assertNoChanges();
   }
 
   test_createEdits_removeHide_firstInCombinator() async {
     Source fooSource = addPackageSource('pkg', 'foo.dart', '');
     await createBuilder('''
 import 'package:pkg/foo.dart' hide A, B, C;
@@ skipping 116 matching lines @@
 import 'package:pkg/foo.dart' hide A, B;
 ''');
     await computeChanges(<ImportedElements>[
       new ImportedElements(fooSource.fullName, '', <String>['A', 'B'])
     ]);
     assertChanges('''
 import 'package:pkg/foo.dart';
 ''');
   }
 }