6eb49ed0d2
git-svn-id: file:///srv/devel/repo-conversion/nusu@111 d2e56fa2-650e-0410-a79f-9358c0239efd
119 lines
3.5 KiB
C#
119 lines
3.5 KiB
C#
#region CPL License
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/*
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Nuclex Framework
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Copyright (C) 2002-2009 Nuclex Development Labs
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This library is free software; you can redistribute it and/or
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modify it under the terms of the IBM Common Public License as
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published by the IBM Corporation; either version 1.0 of the
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License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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IBM Common Public License for more details.
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You should have received a copy of the IBM Common Public
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License along with this library
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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#if UNITTEST
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using NUnit.Framework;
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using NMock2;
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namespace Nuclex.Support.Collections {
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/// <summary>Unit Test for the ReverseComparer helper class</summary>
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[TestFixture]
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public class ReverseComparerTest {
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#region class FortyTwoComparer
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/// <summary>Special comparer in which 42 is larger than everything</summary>
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private class FortyTwoComparer : IComparer<int> {
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/// <summary>Compares the left value to the right value</summary>
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/// <param name="left">Value on the left side</param>
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/// <param name="right">Value on the right side</param>
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/// <returns>The relationship of the two values</returns>
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public int Compare(int left, int right) {
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// Is there a 42 in the arguments?
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if(left == 42) {
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if(right == 42) {
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return 0; // both are equal
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} else {
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return +1; // left is larger
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}
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} else if(right == 42) {
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return -1; // right is larger
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}
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// No 42 encountered, proceed as normal
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return Math.Sign(left - right);
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}
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}
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#endregion // class FortyTwoComparer
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/// <summary>
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/// Tests whether the default constructor of the reverse comparer works
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/// </summary>
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[Test]
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public void TestDefaultConstructor() {
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new ReverseComparer<int>();
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}
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/// <summary>
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/// Tests whether the full constructor of the reverse comparer works
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/// </summary>
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[Test]
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public void TestFullConstructor() {
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new ReverseComparer<int>(new FortyTwoComparer());
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}
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/// <summary>
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/// Tests whether the full constructor of the reverse comparer works
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/// </summary>
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[Test]
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public void TestReversedDefaultComparer() {
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Comparer<int> comparer = Comparer<int>.Default;
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ReverseComparer<int> reverseComparer = new ReverseComparer<int>(comparer);
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Assert.Greater(0, comparer.Compare(10, 20));
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Assert.Less(0, comparer.Compare(20, 10));
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Assert.Less(0, reverseComparer.Compare(10, 20));
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Assert.Greater(0, reverseComparer.Compare(20, 10));
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}
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/// <summary>
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/// Tests whether the full constructor of the reverse comparer works
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/// </summary>
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[Test]
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public void TestReversedCustomComparer() {
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FortyTwoComparer fortyTwoComparer = new FortyTwoComparer();
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ReverseComparer<int> reverseFortyTwoComparer = new ReverseComparer<int>(
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fortyTwoComparer
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);
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Assert.Less(0, fortyTwoComparer.Compare(42, 84));
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Assert.Greater(0, fortyTwoComparer.Compare(84, 42));
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Assert.Greater(0, reverseFortyTwoComparer.Compare(42, 84));
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Assert.Less(0, reverseFortyTwoComparer.Compare(84, 42));
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}
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}
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} // namespace Nuclex.Support.Collections
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#endif // UNITTEST
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