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src/UnitTests/SortingTests - Copy.cs

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+//Test commiting
+// <copyright file="SortingTests.cs" company="Math.NET">
+// Math.NET Numerics, part of the Math.NET Project
+// http://numerics.mathdotnet.com
+// http://github.com/mathnet/mathnet-numerics
+// http://mathnetnumerics.codeplex.com
+//
+// Copyright (c) 2009-2010 Math.NET
+//
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+// </copyright>
+
+namespace MathNet.Numerics.UnitTests
+{
+    using System;
+    using System.Collections.Generic;
+    using MbUnit.Framework;
+    using Numerics;
+
+    [TestFixture]
+    public class SortingTests
+    {
+        [Test]
+        public void TestRandomTupleArraySorting()
+        {
+            const int Len = 0x1 << 10;
+            var random = new Random();
+
+            int[] keys = new int[Len];
+            int[] items = new int[Len];
+            int[] keysCopy = new int[Len];
+
+            for(int i = 0; i < keys.Length; i++)
+            {
+                keys[i] = random.Next();
+                keysCopy[i] = keys[i];
+                items[i] = -keys[i];
+            }
+
+            Sorting.Sort(keys, items);
+
+            for(int i = 1; i < keys.Length; i++)
+            {
+                Assert.IsTrue(keys[i] >= keys[i - 1], "Sort Order - " + i.ToString());
+                Assert.AreEqual(items[i], -keys[i], "Items Permutation - " + i.ToString());
+            }
+
+            for(int i = 0; i < keysCopy.Length; i++)
+            {
+                Assert.IsTrue(Array.IndexOf(keys, keysCopy[i]) >= 0, "All keys still there - " + i.ToString());
+            }
+        }
+
+        [Test]
+        public void TestRandomTupleListSorting()
+        {
+            const int Len = 0x1 << 10;
+            var random = new Random();
+
+            List<int> keys = new List<int>(Len);
+            List<int> items = new List<int>(Len);
+            int[] keysCopy = new int[Len];
+
+            for(int i = 0; i < Len; i++)
+            {
+                int value = random.Next();
+                keys.Add(value);
+                keysCopy[i] = value;
+                items.Add(-value);
+            }
+
+            Sorting.Sort(keys, items);
+
+            for(int i = 1; i < Len; i++)
+            {
+                Assert.IsTrue(keys[i] >= keys[i - 1], "Sort Order - " + i.ToString());
+                Assert.AreEqual(items[i], -keys[i], "Items Permutation - " + i.ToString());
+            }
+
+            for(int i = 0; i < keysCopy.Length; i++)
+            {
+                Assert.IsTrue(keys.IndexOf(keysCopy[i]) >= 0, "All keys still there - " + i.ToString());
+            }
+        }
+
+        [Test]
+        public void TestRandomTripleArraySorting()
+        {
+            const int Len = 0x1 << 10;
+            var random = new Random();
+
+            int[] keys = new int[Len];
+            int[] items1 = new int[Len];
+            int[] items2 = new int[Len];
+            int[] keysCopy = new int[Len];
+
+            for(int i = 0; i < keys.Length; i++)
+            {
+                keys[i] = random.Next();
+                keysCopy[i] = keys[i];
+                items1[i] = -keys[i];
+                items2[i] = keys[i] >> 2;
+            }
+
+            Sorting.Sort(keys, items1, items2);
+
+            for(int i = 1; i < keys.Length; i++)
+            {
+                Assert.IsTrue(keys[i] >= keys[i - 1], "Sort Order - " + i.ToString());
+                Assert.AreEqual(items1[i], -keys[i], "Items1 Permutation - " + i.ToString());
+                Assert.AreEqual(items2[i], keys[i] >> 2, "Items2 Permutation - " + i.ToString());
+            }
+
+            for(int i = 0; i < keysCopy.Length; i++)
+            {
+                Assert.IsTrue(Array.IndexOf(keys, keysCopy[i]) >= 0, "All keys still there - " + i.ToString());
+            }
+        }
+
+        [Test]
+        public void TestAppliedListSorting()
+        {
+            const int Len = 0x1 << 10;
+            var random = new Random();
+
+            List<int> list = new List<int>();
+
+            for(int i = 0; i < Len; i++)
+            {
+                list.Add(random.Next());
+            }
+
+            // default sorting (Ascending)
+            list.Sort();
+
+            // just check that the order is as expected, not that the items are correct
+            for(int i = 1; i < list.Count; i++)
+            {
+                Assert.IsTrue(list[i] >= list[i - 1], "Sort Order - " + i.ToString());
+            }
+        }
+    }
+}