Disable completion in comment text.

pkg/analysis_server/test/services/completion/local_reference_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.local;
 
 import 'package:analysis_server/plugin/protocol/protocol.dart' as protocol
     show Element, ElementKind;
 import 'package:analysis_server/plugin/protocol/protocol.dart'
     hide Element, ElementKind;
@@ skipping 585 matching lines @@
     expect(suggestion.hasNamedParameters, false);
   }
 
   test_ignore_symbol_being_completed() {
     addTestSource('class MyClass { } main(MC^) { }');
     expect(computeFast(), isTrue);
     assertSuggestLocalClass('MyClass');
     assertNotSuggested('MC');
   }
 
+  test_inComment_block_beforeNode() {
+    addTestSource('''
+main(aaa, bbb) {
+  /* text ^ */
+  print(42);
+}
+''');
+    expect(computeFast(), isTrue);
+    assertNoSuggestions();
+  }
+
+  test_inComment_endOfLine_beforeNode() {
+    addTestSource('''
+main(aaa, bbb) {
+  // text ^
+  print(42);
+}
+''');
+    expect(computeFast(), isTrue);
+    assertNoSuggestions();
+  }
+
+  test_inComment_endOfLine_beforeToken() {
+    addTestSource('''
+main(aaa, bbb) {
+  // text ^
+}
+''');
+    expect(computeFast(), isTrue);
+    assertNoSuggestions();
+  }
+
   test_InstanceCreationExpression() {
     addTestSource('''
 class A {foo(){var f; {var x;}}}
 class B {B(this.x, [String boo]) { } int x;}
 class C {C.bar({boo: 'hoo', int z: 0}) { } }
 main() {new ^ String x = "hello";}''');
     computeFast();
     return computeFull((bool result) {
       CompletionSuggestion suggestion;
 
@@ skipping 191 matching lines @@
     assertSuggestLocalVariable('ab', null);
     assertSuggestLocalVariable('_ab', null, relevance: DART_RELEVANCE_DEFAULT);
   }
 
   test_shadowed_name() {
     addTestSource('var a; class A { var a; m() { ^ } }');
     expect(computeFast(), isTrue);
     assertSuggestLocalField('a', null);
   }
 }