// Copyright 2005-2009 Gallio Project - http://www.gallio.org/
// Portions Copyright 2000-2004 Jonathan de Halleux
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

using System;
using MbUnit.Framework;
using MbUnit.Framework.ContractVerifiers;

namespace MbUnit.Samples.ContractVerifiers.Equality
{
    public class SampleEquatable : IEquatable<SampleEquatable>
    {
        private int value;

        public SampleEquatable(int value)
        {
            this.value = value;
        }

        public override int GetHashCode()
        {
            return value.GetHashCode();
        }

        public override bool Equals(object obj)
        {
            return Equals(obj as SampleEquatable);
        }

        public bool Equals(SampleEquatable other)
        {
            return !Object.ReferenceEquals(other, null) &&
                (value == other.value);
        }

        public static bool operator ==(SampleEquatable left, SampleEquatable right)
        {
            return (Object.ReferenceEquals(left, null)
                && Object.ReferenceEquals(right, null))
                || (!Object.ReferenceEquals(left, null) &&
                left.Equals(right));
        }

        public static bool operator !=(SampleEquatable left, SampleEquatable right)
        {
            return !(left == right);
        }
    }
}