Replace hints. Resolve TODO.

pkg/analyzer/test/generated/incremental_resolver_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 engine.incremental_resolver_test;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
@@ skipping 2370 matching lines @@
   // some comment
   print(0);
 }
 ''');
   }
 
   void test_endOfLineComment_edit() {
     _resolveUnit(r'''
 main() {
   // some comment
-  print(2);
+  print(0);
 }
 ''');
     _updateAndValidate(r'''
 main() {
   // edited comment text
   print(0);
 }
 ''');
   }
 
@@ skipping 251 matching lines @@
 ''');
     _updateAndValidate(r'''
 class A {
   main(int b) {
     print(b);
   }
 }
 ''');
   }
 
+  void test_updateErrors_addNew_hint() {
+    _resolveUnit(r'''
+int main() {
+  return 42;
+}
+''');
+    _updateAndValidate(r'''
+int main() {
+}
+''');
+  }
+
   void test_updateErrors_addNew_hints() {
     _resolveUnit(r'''
 main() {
   int v = 0;
   print(v);
 }
 ''');
     _updateAndValidate(r'''
 main() {
   int v = 0;
@@ skipping 50 matching lines @@
 foo(int p) {}
 ''');
     _updateAndValidate(r'''
 main() {
   foo('abc');
 }
 foo(int p) {}
 ''');
   }
 
-  void test_updateErrors_removeExisting() {
+  void test_updateErrors_removeExisting_hint() {
+    _resolveUnit(r'''
+int main() {
+}
+''');
+    _updateAndValidate(r'''
+int main() {
+  return 42;
+}
+''');
+  }
+
+  void test_updateErrors_removeExisting_verify() {
     _resolveUnit(r'''
 f1() {
   print(1)
 }
 f2() {
   print(22)
 }
 f3() {
   print(333)
 }
@@ skipping 1227 matching lines @@
     _visitList(node.metadata, other.metadata);
     _visitNode(node.identifier, other.identifier);
   }
 
   static void assertSameResolution(CompilationUnit actual,
       CompilationUnit expected) {
     _SameResolutionValidator validator = new _SameResolutionValidator(expected);
     actual.accept(validator);
   }
 }