using Xunit;

namespace ConsoleApp.Tests
{
    public class ProgramTests
    {
        [Fact(DisplayName = "PrintClassroomScores calculates row totals correctly for 3x4 array")]
        public void PrintClassroomScores_CalculatesRowTotalsCorrectly()
        {
            int[,] scores = 
            {
                { 85, 90, 78, 92 },
                { 88, 76, 95, 80 },
                { 91, 82, 87, 89 }
            };

            // Expected totals
            int[] expectedTotals = { 345, 339, 349 };
            int rows = scores.GetLength(0);
            int cols = scores.GetLength(1);

            for (int row = 0; row < rows; row++)
            {
                int rowTotal = 0;
                for (int col = 0; col < cols; col++)
                {
                    rowTotal += scores[row, col];
                }
                Assert.Equal(expectedTotals[row], rowTotal);
            }
        }

        [Fact(DisplayName = "PrintClassroomScores handles empty array")]
        public void PrintClassroomScores_EmptyArray()
        {
            int[,] scores = new int[0, 0];
            int rows = scores.GetLength(0);
            int cols = scores.GetLength(1);

            Assert.Equal(0, rows);
            Assert.Equal(0, cols);
        }

        [Fact(DisplayName = "PrintClassroomScores handles single row array")]
        public void PrintClassroomScores_SingleRow()
        {
            int[,] scores = { { 10, 20, 30 } };
            int expectedTotal = 60;

            int rowTotal = 0;
            for (int col = 0; col < scores.GetLength(1); col++)
            {
                rowTotal += scores[0, col];
            }

            Assert.Equal(expectedTotal, rowTotal);
        }
    }
}

ProgramTests.cs

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Challenge: Multi-Dimensional Arrays

Solution