Add fixes for two additional lints

pkg/analysis_server/test/services/correction/fix_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.
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/edit/fix/fix_core.dart';
 import 'package:analysis_server/plugin/edit/fix/fix_dart.dart';
 import 'package:analysis_server/src/services/correction/fix.dart';
 import 'package:analysis_server/src/services/correction/fix_internal.dart';
@@ skipping 5543 matching lines @@
   Future<Null> findLint(String src, String lintCode, {int length: 1}) async {
     int errorOffset = src.indexOf('/*LINT*/');
     await resolveTestUnit(src.replaceAll('/*LINT*/', ''));
     error = new AnalysisError(
         resolutionMap.elementDeclaredByCompilationUnit(testUnit).source,
         errorOffset,
         length,
         new LintCode(lintCode, '<ignored>'));
   }
 
+  test_addRequiredAnnotation() async {
+    String src = '''
+void function({String /*LINT*/param}) {
+  assert(param != null);
+}
+''';
+    await findLint(src, LintNames.always_require_non_null_named_parameters);
+    await applyFix(DartFixKind.LINT_ADD_REQUIRED);
+    verifyResult('''
+void function({@required String param}) {
+  assert(param != null);
+}
+''');
+  }
+
   test_lint_addMissingOverride_field() async {
     String src = '''
 class abstract Test {
   int get t;
 }
 class Sub extends Test {
   int /*LINT*/t = 42;
 }
 ''';
     await findLint(src, LintNames.annotate_overrides);
@@ skipping 214 matching lines @@
 
     await applyFix(DartFixKind.REMOVE_AWAIT);
 
     verifyResult('''
 bad() async {
   print('hola');
 }
 ''');
   }
 
+  test_removeEmptyElse_newLine() async {
+    String src = '''
+void foo(bool cond) {
+  if (cond) {
+    //
+  }
+  else /*LINT*/;
+}
+''';
+    await findLint(src, LintNames.avoid_empty_else);
+
+    await applyFix(DartFixKind.REMOVE_EMPTY_ELSE);
+
+    verifyResult('''
+void foo(bool cond) {
+  if (cond) {
+    //
+  }
+}
+''');
+  }
+
+  test_removeEmptyElse_sameLine() async {
+    String src = '''
+void foo(bool cond) {
+  if (cond) {
+    //
+  } else /*LINT*/;

[scheglov, 2017/08/29 17:05:22]

Is the lint reported for empty else blocks?

[Brian Wilkerson, 2017/08/29 17:16:46]

It isn't currently, but I think it should be.

+}
+''';
+    await findLint(src, LintNames.avoid_empty_else);
+
+    await applyFix(DartFixKind.REMOVE_EMPTY_ELSE);
+
+    verifyResult('''
+void foo(bool cond) {
+  if (cond) {
+    //
+  }
+}
+''');
+  }
+
   test_removeEmptyStatement_insideBlock() async {
     String src = '''
 void foo() {
   while(true) {
     /*LINT*/;
   }
 }
 ''';
     await findLint(src, LintNames.empty_statements);
 
@@ skipping 723 matching lines @@
   @override
   final AnalysisError error;
 
   _DartFixContextImpl(this.resourceProvider, this.analysisDriver,
       this.astProvider, this.unit, this.error);
 
   @override
   GetTopLevelDeclarations get getTopLevelDeclarations =>
       analysisDriver.getTopLevelNameDeclarations;
 }