// 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.

@MirrorsUsed(targets: "Foo")
import "dart:mirrors";

import 'package:expect/expect.dart';

class ParameterAnnotation {
  final String value;
  const ParameterAnnotation(this.value);
}

class Foo {
  f1(@ParameterAnnotation("hest") p) {}
  f2(@ParameterAnnotation("hest") @ParameterAnnotation("fisk") p) {}
  f3(a, @ParameterAnnotation("fugl") p) {}
  f4(@ParameterAnnotation("fisk") a,
     {@ParameterAnnotation("hval") p}) {}
  f5(@ParameterAnnotation("fisk") a,
     [@ParameterAnnotation("hval") p]) {}
  f6({@ParameterAnnotation("fisk") z,
      @ParameterAnnotation("hval") p}) {}
}

expectAnnotations(Type type, Symbol method, int parameterIndex,
                  List<String> expectedValues) {
  MethodMirror mirror = reflectClass(type).declarations[method];
  ParameterMirror parameter = mirror.parameters[parameterIndex];
  List<InstanceMirror> annotations = parameter.metadata;
  Expect.equals(annotations.length, expectedValues.length,
                "wrong number of parameter annotations");
  for (int i = 0; i < annotations.length; i++) {
    Expect.equals(expectedValues[i], annotations[i].reflectee.value,
                  "annotation #$i of parameter #$parameterIndex "
                  "of $type.$method.");
  }
}

main() {
  expectAnnotations(Foo, #f1, 0, ["hest"]);
  expectAnnotations(Foo, #f2, 0, ["hest", "fisk"]);
  expectAnnotations(Foo, #f3, 0, []);
  expectAnnotations(Foo, #f3, 1, ["fugl"]);
  expectAnnotations(Foo, #f4, 0, ["fisk"]);
  expectAnnotations(Foo, #f4, 1, ["hval"]);
  expectAnnotations(Foo, #f5, 0, ["fisk"]);
  expectAnnotations(Foo, #f5, 1, ["hval"]);
  expectAnnotations(Foo, #f6, 0, ["fisk"]);
  expectAnnotations(Foo, #f6, 1, ["hval"]);
}