Merge branch 'TheAlgorithms:master' into master

Algorithms.Tests/Numeric/AbsTests.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Numerics;
+using Algorithms.Numeric;
+using NUnit.Framework;
+
+namespace Algorithms.Tests.Numeric;
+
+public static class AbsTests
+{
+    [TestCase(0, 0)]
+    [TestCase(34, 34)]
+    [TestCase(-100000000000.0d, 100000000000.0d)]
+    [TestCase(-3, 3)]
+    [TestCase(-3.1443123d, 3.1443123d)]
+    public static void GetsAbsVal<T>(T inputNum, T expected) where T : INumber<T>
+    {
+        // Act
+        var result = Abs.AbsVal(inputNum);
+
+        // Assert
+        Assert.That(result, Is.EqualTo(expected));
+    }
+
+    [TestCase(new[] { -3, -1, 2, -11 }, -11)]
+    [TestCase(new[] { 0, 5, 1, 11 }, 11)]
+    [TestCase(new[] { 3.0, -10.0, -2.0 }, -10.0d)]
+    public static void GetAbsMax<T>(T[] inputNums, T expected) where T : INumber<T>
+    {
+        // Act
+        var result = Abs.AbsMax(inputNums);
+
+        // Assert
+        Assert.That(result, Is.EqualTo(expected));
+    }
+
+    [Test]
+    public static void AbsMaxThrowsArgumentException()
+    {
+        // Arrange
+        var inputNums = Array.Empty<int>();
+
+        // Assert
+        Assert.Throws<ArgumentException>(() => Abs.AbsMax(inputNums));
+    }
+
+    [TestCase(new[] { -3, -1, 2, -11 }, -1)]
+    [TestCase(new[] { -3, -5, 1, -11 }, 1)]
+    [TestCase(new[] { 0, 5, 1, 11 }, 0)]
+    public static void GetAbsMin<T>(T[] inputNums, T expected) where T : INumber<T>
+    {
+        // Act
+        var result = Abs.AbsMin(inputNums);
+
+        // Assert
+        Assert.That(result, Is.EqualTo(expected));
+    }
+
+    [Test]
+    public static void AbsMinThrowsArgumentException()
+    {
+        // Arrange
+        var inputNums = Array.Empty<int>();
+
+        // Assert
+        Assert.Throws<ArgumentException>(() => Abs.AbsMin(inputNums));
+    }
+}

Algorithms.Tests/Numeric/SoftMaxTests.cs

@@ -0,0 +1,48 @@
+using System;
+using Algorithms.Numeric;
+using NUnit.Framework;
+
+namespace Algorithms.Tests.Numeric;
+
+public static class SoftMaxTests
+{
+    [TestCase(new[] {5.0, 5.0}, new[] {0.5, 0.5})]
+    [TestCase(new[] {1.0, 2.0, 3.0}, new[] {0.09003057317038046, 0.24472847105479767, 0.6652409557748219})]
+    [TestCase(new[] {0.0}, new[] {1.0})]
+    public static void SoftMaxFunction(double[] input, double[] expected)
+    {
+        // Act
+        var result = SoftMax.Compute(input);
+
+        // Assert
+        Assert.That(result, Is.EqualTo(expected).Within(1e-9));
+    }
+
+    [Test]
+    public static void SoftMaxFunctionThrowsArgumentException()
+    {
+        // Arrange
+        var input = Array.Empty<double>();
+
+        // Assert
+        Assert.Throws<ArgumentException>(() => SoftMax.Compute(input));
+    }
+
+    [TestCase(new[] {1.0, 2.0, 3.0, 4.0, 5.0})]
+    [TestCase(new[] {0.0, 0.0, 0.0, 0.0, 0.0})]
+    [TestCase(new[] {5.0})]
+    public static void SoftMaxFunctionSumsToOne(double[] input)
+    {
+        // Act
+        var result = SoftMax.Compute(input);
+
+        var sum = 0.0;
+        foreach (var value in result)
+        {
+            sum += value;
+        }
+
+        // Assert
+        Assert.That(sum, Is.EqualTo(1.0).Within(1e-9));
+    }
+}

Algorithms.Tests/Sorters/Comparison/BasicTeamSorterTests.cs

@@ -0,0 +1,87 @@
+using Algorithms.Sorters.Comparison;
+using FluentAssertions;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+
+namespace Algorithms.Tests.Sorters.Comparison
+{
+    [TestFixture]
+    public class BasicTimSorterTests
+    {
+        private readonly BasicTimSorter<int> sorter = new(Comparer<int>.Default);
+
+        [Test]
+        public void Sort_EmptyArray_DoesNotThrow()
+        {
+            var array = Array.Empty<int>();
+            Assert.DoesNotThrow(() => sorter.Sort(array));
+            Assert.That(array, Is.Empty);
+        }
+
+        [Test]
+        public void Sort_SingleElementArray_DoesNotChangeArray()
+        {
+            var array = new[] { 1 };
+            sorter.Sort(array);
+            Assert.That(array, Is.EqualTo(new[] { 1 }));
+        }
+
+        [Test]
+        public void Sort_AlreadySortedArray_DoesNotChangeArray()
+        {
+            var array = new[] { 1, 2, 3, 4, 5 };
+            sorter.Sort(array);
+            Assert.That(array, Is.EqualTo(new[] { 1, 2, 3, 4, 5 }));
+        }
+
+        [Test]
+        public void Sort_UnsortedArray_SortsCorrectly()
+        {
+            var array = new[] { 5, 3, 1, 4, 2 };
+            sorter.Sort(array);
+            Assert.That(array, Is.EqualTo(new[] { 1, 2, 3, 4, 5 }));
+        }
+
+        [Test]
+        public void Sort_ReverseSortedArray_SortsCorrectly()
+        {
+            var array = new[] { 5, 4, 3, 2, 1 };
+            sorter.Sort(array);
+            Assert.That(array, Is.EqualTo(new[] { 1, 2, 3, 4, 5 }));
+        }
+
+        [Test]
+        public void Sort_ArrayWithDuplicates_SortsCorrectly()
+        {
+            var array = new[] { 3, 1, 2, 3, 1, 2 };
+            sorter.Sort(array);
+            Assert.That(array, Is.EqualTo(new[] { 1, 1, 2, 2, 3, 3 }));
+        }
+
+        [Test]
+        public void Sort_LargeArray_SortsCorrectly()
+        {
+            var array = new int[1000];
+            for (var i = 0; i < 1000; i++)
+            {
+                array[i] = 1000 - i;
+            }
+            sorter.Sort(array);
+            array.Should().BeInAscendingOrder();
+        }
+
+        [Test]
+        public void Sort_LargeRandomArray_SortsCorrectly()
+        {
+            var array = new int[1000];
+            var random = new Random();
+            for (var i = 0; i < 1000; i++)
+            {
+                array[i] = random.Next(1, 1001);
+            }
+            sorter.Sort(array);
+            array.Should().BeInAscendingOrder();
+        }
+    }
+}

Algorithms.Tests/Sorters/Comparison/TimSorterTests.cs

@@ -9,13 +9,14 @@ namespace Algorithms.Tests.Sorters.Comparison;
 public static class TimSorterTests
 {
     private static readonly IntComparer IntComparer = new();
+    private static readonly TimSorterSettings Settings = new();
 
     [Test]
     public static void ArraySorted(
         [Random(0, 10_000, 2000)] int n)
     {
         // Arrange
-        var sorter = new TimSorter<int>();
+        var sorter = new TimSorter<int>(Settings, IntComparer);
         var (correctArray, testArray) = RandomHelper.GetArrays(n);
 
         // Act
@@ -30,7 +31,7 @@ public static void ArraySorted(
     public static void TinyArray()
     {
         // Arrange
-        var sorter = new TimSorter<int>();
+        var sorter = new TimSorter<int>(Settings, IntComparer);
         var tinyArray = new[] { 1 };
         var correctArray = new[] { 1 };
 
@@ -45,7 +46,7 @@ public static void TinyArray()
     public static void SmallChunks()
     {
         // Arrange
-        var sorter = new TimSorter<int>();
+        var sorter = new TimSorter<int>(Settings, IntComparer);
         var (correctArray, testArray) = RandomHelper.GetArrays(800);
         Array.Sort(correctArray, IntComparer);
         Array.Sort(testArray, IntComparer);

Algorithms.Tests/Sorters/Utils/GallopingStrategyTests.cs

@@ -0,0 +1,120 @@
+using Algorithms.Sorters.Utils;
+using NUnit.Framework;
+using System.Collections.Generic;
+
+namespace Algorithms.Tests.Sorters.Utils
+{
+    [TestFixture]
+    public class GallopingStrategyTests
+    {
+        private readonly IComparer<int> comparer = Comparer<int>.Default;
+
+[Test]
+        public void GallopLeft_KeyPresent_ReturnsCorrectIndex()
+        {
+            var array = new[] { 1, 2, 3, 4, 5 };
+            var index = GallopingStrategy<int>.GallopLeft(array, 3, 0, array.Length, comparer);
+            Assert.That(index, Is.EqualTo(2));
+        }
+
+        [Test]
+        public void GallopLeft_KeyNotPresent_ReturnsCorrectIndex()
+        {
+            var array = new[] { 1, 2, 4, 5 };
+            var index = GallopingStrategy<int>.GallopLeft(array, 3, 0, array.Length, comparer);
+            Assert.That(index, Is.EqualTo(2));
+        }
+
+        [Test]
+        public void GallopLeft_KeyLessThanAll_ReturnsZero()
+        {
+            var array = new[] { 2, 3, 4, 5 };
+            var index = GallopingStrategy<int>.GallopLeft(array, 1, 0, array.Length, comparer);
+            Assert.That(index, Is.EqualTo(0));
+        }
+
+        [Test]
+        public void GallopLeft_KeyGreaterThanAll_ReturnsLength()
+        {
+            var array = new[] { 1, 2, 3, 4 };
+            var index = GallopingStrategy<int>.GallopLeft(array, 5, 0, array.Length, comparer);
+            Assert.That(index, Is.EqualTo(array.Length));
+        }
+
+        [Test]
+        public void GallopRight_KeyPresent_ReturnsCorrectIndex()
+        {
+            var array = new[] { 1, 2, 3, 4, 5 };
+            var index = GallopingStrategy<int>.GallopRight(array, 3, 0, array.Length, comparer);
+            Assert.That(index, Is.EqualTo(3));
+        }
+
+        [Test]
+        public void GallopRight_KeyNotPresent_ReturnsCorrectIndex()
+        {
+            var array = new[] { 1, 2, 4, 5 };
+            var index = GallopingStrategy<int>.GallopRight(array, 3, 0, array.Length, comparer);
+            Assert.That(index, Is.EqualTo(2));
+        }
+
+        [Test]
+        public void GallopRight_KeyLessThanAll_ReturnsZero()
+        {
+            var array = new[] { 2, 3, 4, 5 };
+            var index = GallopingStrategy<int>.GallopRight(array, 1, 0, array.Length, comparer);
+            Assert.That(index, Is.EqualTo(0));
+        }
+
+        [Test]
+        public void GallopRight_KeyGreaterThanAll_ReturnsLength()
+        {
+            var array = new[] { 1, 2, 3, 4 };
+            var index = GallopingStrategy<int>.GallopRight(array, 5, 0, array.Length, comparer);
+            Assert.That(index, Is.EqualTo(array.Length));
+        }
+
+        [Test]
+        public void GallopLeft_EmptyArray_ReturnsZero()
+        {
+            var array = new int[] { };
+            var index = GallopingStrategy<int>.GallopLeft(array, 1, 0, array.Length, comparer);
+            Assert.That(index, Is.EqualTo(0));
+        }
+
+        [Test]
+        public void GallopRight_EmptyArray_ReturnsZero()
+        {
+            var array = new int[] { };
+            var index = GallopingStrategy<int>.GallopRight(array, 1, 0, array.Length, comparer);
+            Assert.That(index, Is.EqualTo(0));
+        }
+
+        // Test when (shiftable << 1) < 0 is true
+        [Test]
+        public void TestBoundLeftShift_WhenShiftableCausesNegativeShift_ReturnsShiftedValuePlusOne()
+        {
+            // Arrange
+            int shiftable = int.MaxValue; // This should cause a negative result after left shift
+
+            // Act
+            int result = GallopingStrategy<int>.BoundLeftShift(shiftable);
+
+            // Assert
+            Assert.That((shiftable << 1) + 1, Is.EqualTo(result));  // True branch
+        }
+
+        // Test when (shiftable << 1) < 0 is false
+        [Test]
+        public void TestBoundLeftShift_WhenShiftableDoesNotCauseNegativeShift_ReturnsMaxValue()
+        {
+            // Arrange
+            int shiftable = 1;  // This will not cause a negative result after left shift
+
+            // Act
+            int result = GallopingStrategy<int>.BoundLeftShift(shiftable);
+
+            // Assert
+            Assert.That(int.MaxValue, Is.EqualTo(result));  // False branch
+        }
+    }
+}