Split error code to ease future improvements

pkg/analyzer/test/generated/compile_time_error_code_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 analyzer.test.generated.compile_time_error_code_test;
 
 import 'dart:async';
 
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/src/error/codes.dart';
@@ skipping 2172 matching lines @@
   const A();
 }
 class B extends A {
   const B() : super(0);
 }''');
     await computeAnalysisResult(source);
     assertErrors(source, [CompileTimeErrorCode.EXTRA_POSITIONAL_ARGUMENTS]);
     verify([source]);
   }
 
+  test_extraPositionalArgumentsCouldBeNamed_const() async {
+    Source source = addSource(r'''
+class A {
+  const A({int x});
+}
+main() {
+  const A(0);
+}''');
+    await computeAnalysisResult(source);
+    assertErrors(source,
+        [CompileTimeErrorCode.EXTRA_POSITIONAL_ARGUMENTS_COULD_BE_NAMED]);
+    verify([source]);
+  }
+
+  test_extraPositionalArgumentsCouldBeNamed_const_super() async {
+    Source source = addSource(r'''
+class A {
+  const A({int x});
+}
+class B extends A {
+  const B() : super(0);
+}''');
+    await computeAnalysisResult(source);
+    assertErrors(source,
+        [CompileTimeErrorCode.EXTRA_POSITIONAL_ARGUMENTS_COULD_BE_NAMED]);
+    verify([source]);
+  }
+
   test_fieldFormalParameter_assignedInInitializer() async {
     Source source = addSource(r'''
 class A {
   int x;
   A(this.x) : x = 3 {}
 }''');
     await computeAnalysisResult(source);
     assertErrors(source,
         [CompileTimeErrorCode.FIELD_INITIALIZED_IN_PARAMETER_AND_INITIALIZER]);
     verify([source]);
@@ skipping 4389 matching lines @@
         source, [CompileTimeErrorCode.WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR]);
     verify([source]);
     reset();
   }
 
   Future<Null> _check_wrongNumberOfParametersForOperator1(String name) async {
     await _check_wrongNumberOfParametersForOperator(name, "");
     await _check_wrongNumberOfParametersForOperator(name, "a, b");
   }
 }