
using Xunit;
using System;
using System.IO;

namespace ConsoleApp {
    public class ProgramTests {
        [Fact(DisplayName = "GreetUser prints greeting message with provided name")] 
        public void GreetUser_PrintsGreetingWithGivenName() 
        {
            var sw = new StringWriter();
            Console.SetOut(sw);

            Program.GreetUser("Charlie");
            string output = sw.ToString().Trim();

            Assert.Contains("Charlie", output);
            Assert.Contains("Hello", output);
            Assert.Contains("Welcome", output);

            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }
        
        [Fact(DisplayName = "GreetUser prints correct greeting for different names")] 
        public void GreetUser_PrintsCorrectGreetingForDifferentNames() 
        {
            var sw = new StringWriter();
            Console.SetOut(sw);

            Program.GreetUser("Alice");
            string output1 = sw.ToString();
            sw.GetStringBuilder().Clear();

            Program.GreetUser("Bob");
            string output2 = sw.ToString();

            Assert.Contains("Alice", output1);
            Assert.Contains("Bob", output2);

            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }

        [Fact(DisplayName = "GreetUser uses a single output statement")] 
        public void GreetUser_UsesSingleOutputStatement() 
        {
            var sw = new StringWriter();
            Console.SetOut(sw);

            Program.GreetUser("Dana");
            string output = sw.ToString();
            int lineCount = output.Split(new[] { '\\n', '\\r' }, StringSplitOptions.RemoveEmptyEntries).Length;

            Assert.Equal(1, lineCount);

            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }
    }
}

ProgramTests.cs

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Explore the fundamentals of C# methods, including defining, calling, and understanding different parameter and return types. Practice writing and using methods with a variety of signatures.

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Challenge: Personalized Greetings

Solución

Challenge: Personalized Greetings

Solución