suggest "in" in for statement

pkg/analysis_server/test/services/completion/keyword_contributor_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.services.completion.dart.keyword;
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
 import 'package:analysis_server/src/services/completion/keyword_contributor.dart';
 import 'package:analyzer/src/generated/scanner.dart';
@@ skipping 499 matching lines @@
     assertSuggestKeywords([Keyword.THIS]);
   }
 
   test_empty() {
     addTestSource('^');
     expect(computeFast(), isTrue);
     assertSuggestKeywords(DIRECTIVE_DECLARATION_AND_LIBRARY_KEYWORDS,
         relevance: DART_RELEVANCE_HIGH);
   }
 
+  test_for_expression_in() {
+    addTestSource('main() {for (int x i^)}');
+    expect(computeFast(), isTrue);
+    assertSuggestKeywords([Keyword.IN], relevance: DART_RELEVANCE_HIGH);
+  }
+
+  test_for_expression_in2() {
+    addTestSource('main() {for (int x in^)}');
+    expect(computeFast(), isTrue);
+    assertSuggestKeywords([Keyword.IN], relevance: DART_RELEVANCE_HIGH);
+  }
+
+  test_for_expression_init() {
+    addTestSource('main() {for (int x = i^)}');
+    expect(computeFast(), isTrue);
+    assertSuggestKeywords(
+        [Keyword.FALSE, Keyword.NEW, Keyword.NULL, Keyword.TRUE]);
+  }
+
+  test_for_expression_init2() {
+    addTestSource('main() {for (int x = in^)}');
+    expect(computeFast(), isTrue);
+    assertSuggestKeywords(
+        [Keyword.FALSE, Keyword.NEW, Keyword.NULL, Keyword.TRUE]);
+  }
+
   test_function_async() {
     addTestSource('main()^');
     expect(computeFast(), isTrue);
     assertSuggestKeywords(DECLARATION_KEYWORDS,
         pseudoKeywords: ['async'], relevance: DART_RELEVANCE_HIGH);
   }
 
   test_function_async2() {
     addTestSource('main()^{}');
     expect(computeFast(), isTrue);
@@ skipping 638 matching lines @@
         (c) => msg.writeln('  $c, ${other.contains(c) ? '' : '<<<<<<<<<<<'}'));
   }
 
   bool _equalSets(Iterable<String> iter1, Iterable<String> iter2) {
     if (iter1.length != iter2.length) return false;
     if (iter1.any((c) => !iter2.contains(c))) return false;
     if (iter2.any((c) => !iter1.contains(c))) return false;
     return true;
   }
 }