
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

C#の基礎を構築します — 構文、データ型、制御フロー、ループ、配列、メソッド。Unityトラックの出発点として、エンジンに触れる前に必要な言語の流暢さを身につけます。


このセクションでは、C#の概要について学びます。さらに、C#言語の基本的な要素についても学習します。

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解答