
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.

Start your journey with arrays in C#: learn how to declare, initialize, and access array elements, and tackle your first real-world array challenges.

Dive deeper into arrays by learning how to search for values, filter elements, and perform calculations like finding min, max, and averages.

Advance your skills by learning how to reverse arrays, sort them manually, and understand how arrays are stored and copied in memory.

Explore two-dimensional arrays, learn to perform matrix operations, and tackle real-world challenges involving grids and tables.

Challenge: Clone and Modify

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