
using Xunit;
namespace ConsoleApp {
    public class ProgramTests {
        [Fact(DisplayName = "CloneArray returns a new array with same values as input")] 
        public void CloneArray_ReturnsCopyWithSameValues() 
        {
            int[] original = {1, 2, 3};
            int[] clone = Program.CloneArray(original);
            Assert.Equal(original, clone);
        }

        [Fact(DisplayName = "CloneArray returns a different object than original")] 
        public void CloneArray_ReturnsDifferentObject() 
        {
            int[] original = {1, 2, 3};
            int[] clone = Program.CloneArray(original);
            Assert.False(object.ReferenceEquals(original, clone));
        }

        [Fact(DisplayName = "ModifyArray adds 10 to each element")] 
        public void ModifyArray_AddsTenToEachElement() 
        {
            int[] arr = {5, 7, 9};
            Program.ModifyArray(arr);
            Assert.Equal(new int[]{15, 17, 19}, arr);
        }

        [Fact(DisplayName = "Modifying the cloned array does not affect the original array")] 
        public void ModifyingClone_DoesNotChangeOriginal() 
        {
            int[] original = {2, 4, 6, 8, 10};
            int[] clone = Program.CloneArray(original);
            Program.ModifyArray(clone);
            Assert.Equal(new int[]{2, 4, 6, 8, 10}, original);
            Assert.Equal(new int[]{12, 14, 16, 18, 20}, clone);
        }
    }
}

ProgramTests.cs

Master the essentials and advanced techniques of working with arrays in C#. This course guides you from the basics of declaring and initializing arrays, through practical manipulation, searching, and advanced operations like sorting and matrix calculations. Each section blends engaging theory with real-world themed challenges to ensure a hands-on, beginner-friendly learning experience.

Challenge: Clone and Modify

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