在单元测试中测试私有方法

using System;
using System.Reflection;
using NUnit.Framework;

public class MyClass
{
    private int PrivateMethod(int a, int b)
    {
        return a + b;
    }
}

[TestFixture]
public class MyClassTests
{
    [Test]
    public void TestPrivateMethod()
    {
        var instance = new MyClass();
        var method = typeof(MyClass).GetMethod("PrivateMethod", BindingFlags.NonPublic | BindingFlags.Instance);
        int result = (int)method.Invoke(instance, new object[] { 1, 2 });
        Assert.AreEqual(3, result);
    }
}

public class MyClass
{
    protected int ProtectedMethod(int a, int b)
    {
        return a + b;
    }
}

[TestFixture]
public class MyClassTests
{
    [Test]
    public void TestProtectedMethod()
    {
        var instance = new MyClass();
        int result = instance.ProtectedMethod(1, 2);
        Assert.AreEqual(3, result);
    }
}

public class MyClass
{
    private int PrivateMethod(int a, int b)
    {
        return a + b;
    }

    public int PublicMethod(int a, int b)
    {
        return PrivateMethod(a, b);
    }
}

[TestFixture]
public class MyClassTests
{
    [Test]
    public void TestPublicMethod()
    {
        var instance = new MyClass();
        int result = instance.PublicMethod(1, 2);
        Assert.AreEqual(3, result);
    }
}

public class MyHelper
{
    public int Add(int a, int b)
    {
        return a + b;
    }
}

public class MyClass
{
    private MyHelper helper = new MyHelper();

    public int PublicMethod(int a, int b)
    {
        return helper.Add(a, b);
    }
}

[TestFixture]
public class MyClassTests
{
    [Test]
    public void TestPublicMethod()
    {
        var instance = new MyClass();
        int result = instance.PublicMethod(1, 2);
        Assert.AreEqual(3, result);
    }
}