
using Xunit;
namespace ConsoleApp {
    public class ProgramTests {
        [Fact(DisplayName = "CalculateAverage returns correct average for studentGrades array")]
        public void CalculateAverage_ReturnsCorrectAverage()
        {
            int[] grades = { 85, 92, 78, 90, 88 };
            double expected = (85 + 92 + 78 + 90 + 88) / 5.0;
            double result = Program.CalculateAverage(grades);
            Assert.Equal(expected, result);
        }

        [Fact(DisplayName = "GetStudentsAboveAverage returns correct names for grades above average")]
        public void GetStudentsAboveAverage_ReturnsCorrectNames()
        {
            List<string> names = new List<string> { "Alice", "Bob", "Charlie", "Diana", "Ethan" };
            int[] grades = { 85, 92, 78, 90, 88 };
            double average = Program.CalculateAverage(grades);
            List<string> result = Program.GetStudentsAboveAverage(names, grades, average);
            var expected = new List<string> { "Bob", "Diana", "Ethan" };
            Assert.Equal(expected, result);
        }

        [Fact(DisplayName = "GetStudentsAboveAverage returns names matching correct indices")]
        public void GetStudentsAboveAverage_IndicesMatch()
        {
            List<string> names = new List<string> { "Sam", "Tom", "Jill", "Sue" };
            int[] grades = { 60, 80, 70, 90 };
            double average = Program.CalculateAverage(grades);
            List<string> result = Program.GetStudentsAboveAverage(names, grades, average);
            Assert.Equal(new List<string> { "Tom", "Sue" }, result);
        }

        [Fact(DisplayName = "Functions handle arrays and lists of the same length correctly")]
        public void HandlesArraysAndListsOfSameLength()
        {
            List<string> names = new List<string> { "A", "B", "C" };
            int[] grades = { 50, 100, 75 };
            double average = Program.CalculateAverage(grades);
            List<string> result = Program.GetStudentsAboveAverage(names, grades, average);
            Assert.Equal(new List<string> { "B", "C" }, result);
        }
    }
}

ProgramTests.cs

Master the essential C# collections, from basic lists to advanced dictionaries and sets. This course blends engaging theory with practical, real-world challenges to help you confidently use collections in your C# projects.

Explore the foundational C# collections: arrays and lists. Learn how to create, manipulate, and apply them to solve practical problems.

Delve into C# dictionaries and related collections for efficient key-based data storage and retrieval.

Discover C# sets and useful collection utilities for advanced data manipulation and analysis.

Challenge: Student Grades Analyzer

解答