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

pkg/analysis_server/test/services/completion/dart/type_member_contributor_test.dart

 // Copyright (c) 2015, 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.type_member;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/provisional/completion/dart/completion_dart.dart';
@@ skipping 4145 matching lines @@
     assertNotSuggested('f');
     assertNotSuggested('x');
     assertNotSuggested('e');
   }
 }
 
 @reflectiveTest
 class TypeMemberContributorTest_Driver extends TypeMemberContributorTest {
   @override
   bool get enableNewAnalysisDriver => true;
+
+  test_ArgDefaults_method() async {
+    addTestSource('''
+class A {
+  bool a(int b, bool c) => false;
 }
+
+void main() {new A().a^}''');
+    await computeSuggestions();
+
+    assertSuggestMethod('a', 'A', 'bool', defaultArgListString: 'b, c');
+  }
+
+  test_ArgDefaults_method_none() async {
+    addTestSource('''
+class A {
+  bool a() => false;
+}
+
+void main() {new A().a^}''');
+    await computeSuggestions();
+
+    assertSuggestMethod('a', 'A', 'bool', defaultArgListString: null);
+  }
+
+  test_ArgDefaults_method_with_optional_positional() async {
+    addMetaPackageSource();
+    addTestSource('''
+import 'package:meta/meta.dart';
+
+class A {
+  bool foo(int bar, [bool boo, int baz]) => false;
+}
+
+void main() {new A().f^}''');
+    await computeSuggestions();
+
+    assertSuggestMethod('foo', 'A', 'bool', defaultArgListString: 'bar');
+  }
+
+  test_ArgDefaults_method_with_required_named() async {
+    addMetaPackageSource();
+    addTestSource('''
+import 'package:meta/meta.dart';
+
+class A {
+  bool foo(int bar, {bool boo, @required int baz}) => false;
+}
+
+void main() {new A().f^}''');
+    await computeSuggestions();
+
+    assertSuggestMethod('foo', 'A', 'bool',
+        defaultArgListString: 'bar, baz: null');
+  }
+}