LibTest/mirrors/before_param_t03.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.

// @dart = 2.9

/// @assertion Metadata can appear before  ...  parameter ...
/// @description Check that metadata is allowed before class factory constructor
/// parameter
/// @author a.semenov@unipro.ru

import 'dart:mirrors';
import '../../Utils/expect.dart';

class A {
  const A();
}

class B {
  factory B(@A() int b)   => throw "This is a test";
  factory B.b(@A() int b) => throw "This is a test";
}

main() {
  Symbol ctorName1 = MirrorSystem.getSymbol('B');
  DeclarationMirror ctorMirror1 =
    reflectClass(B).declarations[ctorName1] as DeclarationMirror;
  ParameterMirror paramMirror1 = (ctorMirror1 as MethodMirror).parameters[0];
  InstanceMirror aMirror1 = paramMirror1.metadata[0];
  Expect.equals('.A', MirrorSystem.getName(aMirror1.type.qualifiedName));

  Symbol ctorName2 = MirrorSystem.getSymbol('B.b');
  DeclarationMirror ctorMirror2 =
    reflectClass(B).declarations[ctorName2] as DeclarationMirror;
  ParameterMirror paramMirror2 = (ctorMirror2 as MethodMirror).parameters[0];
  InstanceMirror aMirror2 = paramMirror2.metadata[0];
  Expect.equals('.A', MirrorSystem.getName(aMirror2.type.qualifiedName));
}