bulk fix for prefer_null_aware_operators

Change-Id: I12b0f8bded48cf17550b6d7203e7b45576953574
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/161340
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Phil Quitslund <pquitslund@google.com>

Author: pq

pkg/analysis_server/lib/src/services/correction/bulk_fix_processor.dart

@@ -19,6 +19,7 @@ import 'package:analysis_server/src/services/correction/dart/convert_to_contains
 import 'package:analysis_server/src/services/correction/dart/convert_to_generic_function_syntax.dart';
 import 'package:analysis_server/src/services/correction/dart/convert_to_if_null.dart';
 import 'package:analysis_server/src/services/correction/dart/convert_to_int_literal.dart';
+import 'package:analysis_server/src/services/correction/dart/convert_to_null_aware.dart';
 import 'package:analysis_server/src/services/correction/dart/convert_to_where_type.dart';
 import 'package:analysis_server/src/services/correction/dart/create_method.dart';
 import 'package:analysis_server/src/services/correction/dart/make_final.dart';
@@ -99,6 +100,7 @@ class BulkFixProcessor {
     LintNames.prefer_is_empty: ReplaceWithIsEmpty.newInstance,
     LintNames.prefer_is_not_empty: UesIsNotEmpty.newInstance,
     LintNames.prefer_iterable_whereType: ConvertToWhereType.newInstance,
+    LintNames.prefer_null_aware_operators: ConvertToNullAware.newInstance,
     LintNames.prefer_single_quotes: ConvertToSingleQuotes.newInstance,
     LintNames.prefer_spread_collections: ConvertAddAllToSpread.newInstance,
     LintNames.slash_for_doc_comments: ConvertDocumentationIntoLine.newInstance,

pkg/analysis_server/test/src/services/correction/fix/bulk/convert_to_null_aware_test.dart

@@ -0,0 +1,37 @@
+// Copyright (c) 2020, 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.
+
+import 'package:analysis_server/src/services/linter/lint_names.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import 'bulk_fix_processor.dart';
+
+void main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(ConvertToNullAwareTest);
+  });
+}
+
+@reflectiveTest
+class ConvertToNullAwareTest extends BulkFixProcessorTest {
+  @override
+  String get lintCode => LintNames.prefer_null_aware_operators;
+
+  Future<void> test_singleFile() async {
+    await resolveTestUnit('''
+abstract class A {
+  int m();
+}
+int f(A a) => null == a ? null : a.m();
+int g(A a) => a == null ? null : a.m();
+''');
+    await assertHasFix('''
+abstract class A {
+  int m();
+}
+int f(A a) => a?.m();
+int g(A a) => a?.m();
+''');
+  }
+}

pkg/analysis_server/test/src/services/correction/fix/bulk/test_all.dart

@@ -16,6 +16,7 @@ import 'convert_to_generic_function_syntax_test.dart'
 import 'convert_to_if_element_test.dart' as convert_to_if_element;
 import 'convert_to_if_null_test.dart' as convert_to_if_null;
 import 'convert_to_int_literal_test.dart' as convert_to_int_literal;
+import 'convert_to_null_aware_test.dart' as convert_to_null_aware;
 import 'convert_to_single_quoted_strings_test.dart'
     as convert_to_single_quoted_strings;
 import 'convert_to_spread_test.dart' as convert_to_spread;
@@ -60,6 +61,7 @@ void main() {
     convert_to_if_element.main();
     convert_to_if_null.main();
     convert_to_int_literal.main();
+    convert_to_null_aware.main();
     convert_to_single_quoted_strings.main();
     convert_to_spread.main();
     convert_to_where_type.main();