Fix for issue 24555: import/export/part completion improvement.

pkg/analysis_server/test/domain_completion_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.domain.completion;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/domain_completion.dart';
@@ skipping 122 matching lines @@
     await waitForTasksFinished();
     server.updateContent('uc1', {testFile: new AddContentOverlay(testCode)});
     server.updateContent('uc2', {
       testFile:
           new ChangeContentOverlay([new SourceEdit(completionOffset, 0, 'xp')])
     });
     completionOffset += 2;
     await getSuggestions();
     expect(replacementOffset, completionOffset - 3);
     expect(replacementLength, 3);
-    assertHasResult(CompletionSuggestionKind.KEYWORD, 'export',
-        relevance: DART_RELEVANCE_HIGH);
-    assertHasResult(CompletionSuggestionKind.KEYWORD, 'import',
-        relevance: DART_RELEVANCE_HIGH);
+    assertHasResult(CompletionSuggestionKind.KEYWORD, 'export \'\';',
+        selectionOffset: 8, relevance: DART_RELEVANCE_HIGH);
+    assertHasResult(CompletionSuggestionKind.KEYWORD, 'import \'\';',
+        selectionOffset: 8, relevance: DART_RELEVANCE_HIGH);
     assertNoResult('extends');
     assertNoResult('library');
   }
 
   test_imports_partial() async {
     addTestFile('''^
       import "package:foo/foo.dart";
       import "package:bar/bar.dart";
       class Baz { }''');
 
@@ skipping 10 matching lines @@
     Response response = handleSuccessfulRequest(
         new CompletionGetSuggestionsParams(testFile, completionOffset)
             .toRequest('0'));
     completionId = response.id;
     assertValidId(completionId);
     await waitForTasksFinished();
     expect(replacementOffset, completionOffset - 1);
     expect(replacementLength, 1);
     assertHasResult(CompletionSuggestionKind.KEYWORD, 'library',
         relevance: DART_RELEVANCE_HIGH);
-    assertHasResult(CompletionSuggestionKind.KEYWORD, 'import',
-        relevance: DART_RELEVANCE_HIGH);
-    assertHasResult(CompletionSuggestionKind.KEYWORD, 'export',
-        relevance: DART_RELEVANCE_HIGH);
-    assertHasResult(CompletionSuggestionKind.KEYWORD, 'part',
-        relevance: DART_RELEVANCE_HIGH);
+    assertHasResult(CompletionSuggestionKind.KEYWORD, 'import \'\';',
+        selectionOffset: 8, relevance: DART_RELEVANCE_HIGH);
+    assertHasResult(CompletionSuggestionKind.KEYWORD, 'export \'\';',
+        selectionOffset: 8, relevance: DART_RELEVANCE_HIGH);
+    assertHasResult(CompletionSuggestionKind.KEYWORD, 'part \'\';',
+        selectionOffset: 6, relevance: DART_RELEVANCE_HIGH);
     assertNoResult('extends');
   }
 
   test_imports_prefixed() {
     addTestFile('''
       import 'dart:html' as foo;
       main() {^}
     ''');
     return getSuggestions().then((_) {
       expect(replacementOffset, equals(completionOffset));
@@ skipping 153 matching lines @@
       expect(replacementLength, equals(0));
       assertHasResult(CompletionSuggestionKind.INVOCATION, 'b');
     });
   }
 
   test_keyword() {
     addTestFile('library A; cl^');
     return getSuggestions().then((_) {
       expect(replacementOffset, equals(completionOffset - 2));
       expect(replacementLength, equals(2));
-      assertHasResult(CompletionSuggestionKind.KEYWORD, 'export',
-          relevance: DART_RELEVANCE_HIGH);
+      assertHasResult(CompletionSuggestionKind.KEYWORD, 'export \'\';',
+          selectionOffset: 8, relevance: DART_RELEVANCE_HIGH);
       assertHasResult(CompletionSuggestionKind.KEYWORD, 'class',
           relevance: DART_RELEVANCE_HIGH);
     });
   }
 
   test_local_named_constructor() {
     addTestFile('class A {A.c(); x() {new A.^}}');
     return getSuggestions().then((_) {
       expect(replacementOffset, equals(completionOffset));
       expect(replacementLength, equals(0));
@@ skipping 189 matching lines @@
 }
     ''');
     await waitForTasksFinished();
     Request request =
         new CompletionGetSuggestionsParams(testFile, 0).toRequest('0');
     Response response = handler.handleRequest(request);
     expect(response.error, isNotNull);
     expect(response.error.code, RequestErrorCode.NO_INDEX_GENERATED);
   }
 }