More tests for 'Organize Directives'.

pkg/analysis_server/test/edit/organize_directives_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.edit.organize_directives;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/edit/edit_domain.dart';
 import 'package:analysis_server/src/protocol.dart';
@@ skipping 47 matching lines @@
 
   Future test_BAD_notDartFile() async {
     await waitForTasksFinished();
     Request request =
         new EditOrganizeDirectivesParams('/not-a-Dart-file.txt').toRequest('0');
     Response response = handler.handleRequest(request);
     expect(
         response, isResponseFailure('0', RequestErrorCode.FILE_NOT_ANALYZED));
   }
 
+  Future test_OK_remove_duplicateImports_withSamePrefix() {
+    addTestFile('''
+library lib;
+
+import 'dart:async' as async;
+import 'dart:async' as async;
+
+main() {
+  async.Future f;
+}
+''');
+    return _assertOrganized(r'''
+library lib;
+
+import 'dart:async' as async;
+
+main() {
+  async.Future f;
+}
+''');
+  }
+
   Future test_OK_remove_unresolvedDirectives() {
     addFile('$testFolder/existing_part1.dart', 'part of lib;');
     addFile('$testFolder/existing_part2.dart', 'part of lib;');
     addTestFile('''
 library lib;
 
 export 'dart:noSuchExportSdkLibrary';
 export 'dart:async';
 export 'package:noSuchExportPackage/andLib.dart';
 export 'dart:math';
@@ skipping 63 matching lines @@
     expect(resultCode, expectedCode);
   }
 
   void _requestOrganize() {
     Request request = new EditOrganizeDirectivesParams(testFile).toRequest('0');
     Response response = handleSuccessfulRequest(request);
     var result = new EditOrganizeDirectivesResult.fromResponse(response);
     fileEdit = result.edit;
   }
 }