comparerstests.cs

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//******************************
// Written by Peter Golde
// Copyright (c) 2004-2005, Wintellect
//
// Use and restribution of this code is subject to the license agreement 
// contained in the file "License.txt" accompanying this file.
//******************************

#region Using directives

using System;
using System.Collections.Generic;
using System.Text;
using NUnit.Framework;

#endregion

namespace Wintellect.PowerCollections.Tests
{

    /// <summary>
    /// Class that doesn't implement any IComparable.
    /// </summary>
    class Unorderable
    {
    }

    /// <summary>
    /// Comparable that compares ints, sorting odds before evens.
    /// </summary>
    class OddEvenComparable : System.IComparable
    {
        public int val;

        public OddEvenComparable(int v)
        {
            val = v;
        }

        public int CompareTo(object other)
        {
            int e1 = val;
            int e2 = ((OddEvenComparable)other).val;
            if ((e1 & 1) == 1 && (e2 & 1) == 0)
                return -1;
            else if ((e1 & 1) == 0 && (e2 & 1) == 1)
                return 1;
            else if (e1 < e2)
                return -1;
            else if (e1 > e2)
                return 1;
            else
                return 0;
        }

        public override bool Equals(object obj)
        {
            if (obj is OddEvenComparable) 
                return CompareTo((OddEvenComparable) obj) == 0;
            else
                return false;
        }

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

    }

    /// <summary>
    /// Comparable that compares ints, sorting odds before evens.
    /// </summary>
    class GOddEvenComparable : System.IComparable<GOddEvenComparable>
    {
        public int val;

        public GOddEvenComparable(int v)
        {
            val = v;
        }

        public int CompareTo(GOddEvenComparable other)
        {
            int e1 = val;
            int e2 = other.val;
            if ((e1 & 1) == 1 && (e2 & 1) == 0)
                return -1;
            else if ((e1 & 1) == 0 && (e2 & 1) == 1)
                return 1;
            else if (e1 < e2)
                return -1;
            else if (e1 > e2)
                return 1;
            else
                return 0;
        }
    }

    /// <summary>
    /// Comparable that compares ints, equating odds with odds and evens with evrents..
    /// </summary>
    class GOddEvenEquatable : System.IEquatable<GOddEvenEquatable>
    {
        public int val;

        public GOddEvenEquatable(int v)
        {
            val = v;
        }

        public bool Equals(GOddEvenEquatable other)
        {
            return ((this.val & 1) == (other.val & 1));
        }

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

    /// <summary>
    /// Comparer that compares ints, sorting odds before evens.
    /// </summary>
    class OddEvenComparer : System.Collections.IComparer
    {
        public int Compare(object x, object y)
        {
            int e1 = (int)x;
            int e2 = (int)y;
            if ((e1 & 1) == 1 && (e2 & 1) == 0)
                return -1;
            else if ((e1 & 1) == 0 && (e2 & 1) == 1)
                return 1;
            else if (e1 < e2)
                return -1;
            else if (e1 > e2)
                return 1;
            else
                return 0;
        }
    }

    /// <summary>
    /// Comparer that compares ints, sorting odds before evens.
    /// </summary>
    class GOddEvenComparer : System.Collections.Generic.IComparer<int>
    {
        public int Compare(int e1, int e2)
        {
            if ((e1 & 1) == 1 && (e2 & 1) == 0)
                return -1;
            else if ((e1 & 1) == 0 && (e2 & 1) == 1)
                return 1;
            else if (e1 < e2)
                return -1;
            else if (e1 > e2)
                return 1;
            else
                return 0;
        }

        public override bool Equals(object obj)
        {
            return (obj is GOddEvenComparer);
        }

        public override int GetHashCode()
        {
            return 123569;
        }
    }

    /// <summary>
    /// Comparer that compares ints, sorting odds before evens.
    /// </summary>
    class GOddEvenEqualityComparer : System.Collections.Generic.IEqualityComparer<int>
    {
        public bool Equals(int e1, int e2)
        {
            return ((e1 & 1) == (e2 & 1));
        }

        public int GetHashCode(int i)
        {
            return i;
        }

        public override bool Equals(object obj)
        {
            return (obj is GOddEvenComparer);
        }

        public override int GetHashCode()
        {
            return 123569;
        }