Default arg support continued (flutter-intellij#553).

pkg/analysis_server/test/services/completion/dart/local_constructor_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.contributor.dart.constructor;
 
 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 4135 matching lines @@
     assertNotSuggested('x');
     assertNotSuggested('e');
   }
 }
 
 @reflectiveTest
 class LocalConstructorContributorTest_Driver
     extends LocalConstructorContributorTest {
   @override
   bool get enableNewAnalysisDriver => true;
+
+  /// Sanity check.  Permutations tested in local_ref_contributor.
+  test_ArgDefaults_cons_with_required_named() async {
+    addMetaPackageSource();
+    addTestSource('''
+import 'package:meta/meta.dart';
+
+class A {
+  A(int bar, {bool boo, @required int baz});
+  baz() {
+    new A^
+  }
+}''');
+    await computeSuggestions();
+
+    assertSuggestConstructor('A',
+        defaultArgListString: 'bar, baz: null');
+  }
 }