
using Xunit;
using System;
using System.IO;

namespace ConsoleApp {
    public class ProgramTests {
        [Fact(DisplayName = "PrintPlanDescription prints 'Basic Plan' for code 1")]
        public void Prints_BasicPlan_For1()
        {
            var sw = new StringWriter();
            Console.SetOut(sw);
            Program.PrintPlanDescription(1);
            string output = sw.ToString().Trim();
            Assert.Equal("Basic Plan", output);
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }

        [Fact(DisplayName = "PrintPlanDescription prints 'Standard Plan' for code 2")]
        public void Prints_StandardPlan_For2()
        {
            var sw = new StringWriter();
            Console.SetOut(sw);
            Program.PrintPlanDescription(2);
            string output = sw.ToString().Trim();
            Assert.Equal("Standard Plan", output);
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }

        [Fact(DisplayName = "PrintPlanDescription prints 'Premium Plan' for code 3")]
        public void Prints_PremiumPlan_For3()
        {
            var sw = new StringWriter();
            Console.SetOut(sw);
            Program.PrintPlanDescription(3);
            string output = sw.ToString().Trim();
            Assert.Equal("Premium Plan", output);
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }

        [Fact(DisplayName = "PrintPlanDescription prints 'Weekend' for code 4")]
        public void Prints_Weekend_For4()
        {
            var sw = new StringWriter();
            Console.SetOut(sw);
            Program.PrintPlanDescription(4);
            string output = sw.ToString().Trim();
            Assert.Equal("Weekend", output);
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }

        [Fact(DisplayName = "PrintPlanDescription prints 'Holiday' for code 5")]
        public void Prints_Holiday_For5()
        {
            var sw = new StringWriter();
            Console.SetOut(sw);
            Program.PrintPlanDescription(5);
            string output = sw.ToString().Trim();
            Assert.Equal("Holiday", output);
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }

        [Fact(DisplayName = "PrintPlanDescription prints 'Invalid code' for code 0")]
        public void Prints_InvalidCode_For0()
        {
            var sw = new StringWriter();
            Console.SetOut(sw);
            Program.PrintPlanDescription(0);
            string output = sw.ToString().Trim();
            Assert.Equal("Invalid code", output);
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }

        [Fact(DisplayName = "PrintPlanDescription prints 'Invalid code' for code 10")]
        public void Prints_InvalidCode_For10()
        {
            var sw = new StringWriter();
            Console.SetOut(sw);
            Program.PrintPlanDescription(10);
            string output = sw.ToString().Trim();
            Assert.Equal("Invalid code", output);
            Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = true });
        }
    }
}

ProgramTests.cs

Get ready to embark on a thrilling coding journey with C# - the language that powers Windows applications, games, and more. Unlock the potential to build everything from dynamic web apps to powerful desktop software. With its elegance, performance, and versatility, C# is your gateway to the future of programming. Let's dive in and bring your coding dreams to life!

In this section we will get an introduction to C#. Moreover, we will also learn some basic elements of the C# language.

In any programming language we have to deal with different types of data. In this section we will learn about that.

In this section we will learn about features of C# that help us control the flow of the program such as executing pieces of code based on conditions.

In this section we will learn about how to deal with repetitive tasks in programming.

Arrays are an important part of any programming language as they let us group together and manipulate a large amount of similar data. In this section we will learn about Arrays and how to use them for practical applications.

In this section we will learn about one of of the most widely used and essential features of C# called Methods. We will also explore its uses through creative practice tasks. 

Challenge: Switch

解答