
using Xunit;
namespace ConsoleApp {
    public class ProgramTests {
        [Fact(DisplayName = "Returns exactly 3 names when 5 players are provided")]
        public void GetTopScorers_ReturnsThreeNames_WhenFivePlayers()
        {
            var names = new List<string> { "Alice", "Bob", "Charlie", "David", "Eve" };
            var scores = new List<int> { 85, 95, 78, 92, 90 };
            var result = Program.GetTopScorers(names, scores);
            Assert.Equal(3, result.Count);
        }

        [Fact(DisplayName = "Returns names of the players with the 3 highest scores, in correct order")]
        public void GetTopScorers_ReturnsTopThreeNamesInOrder()
        {
            var names = new List<string> { "Alice", "Bob", "Charlie", "David", "Eve" };
            var scores = new List<int> { 85, 95, 78, 92, 90 };
            var result = Program.GetTopScorers(names, scores);
            var expected = new List<string> { "Bob", "David", "Eve" };
            Assert.Equal(expected, result);
        }

        [Fact(DisplayName = "Returns all player names if fewer than 3 players")]
        public void GetTopScorers_ReturnsAllNames_WhenLessThanThreePlayers()
        {
            var names = new List<string> { "Sam", "Max" };
            var scores = new List<int> { 70, 80 };
            var result = Program.GetTopScorers(names, scores);
            var expected = new List<string> { "Max", "Sam" };
            Assert.Equal(expected, result);
        }

        [Fact(DisplayName = "Handles ties by keeping first occurrence for equal scores")]
        public void GetTopScorers_HandlesTies_KeepsFirstOccurrence()
        {
            var names = new List<string> { "Anna", "Ben", "Cara", "Dan" };
            var scores = new List<int> { 90, 90, 80, 90 };
            var result = Program.GetTopScorers(names, scores);
            var expected = new List<string> { "Anna", "Ben", "Dan" };
            Assert.Equal(expected, 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: Top Scorers Finder

Solution