Nunit 未在任何测试方法中运行

>我在类库中有两个类

namespace ClassLibrary3
{
public class Class1
{
    public string title;
    public string author;
    public Class1(string title, string author)
    {
        this.title = title;
        this.author = author;
    }
}
}

另一个类

using System;
using System.Collections;
using System.Linq;
using System.Text;
namespace ClassLibrary3

{ 类 2 { 私人哈希表书籍;

    public Class2()
    {
        books = new Hashtable();
    }
    public void addBook(Class1 book)
    {
        books.Add(book.title, book);
    }
    public Class1 getBook(String title, String author)
    {
        return (Class1)books[title];
    }
    public void removeBook(string title)
    {
        if (books[title] != null)
            books.Remove(title);
    }

}
}   

我的测试是

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NUnit.Framework;
using System.Collections;
namespace ClassLibrary3
{
[TestFixture]
class TEST
{
    [Test]
    public void getbooktest()
    {
    Class1 c1 = new Class1("story", "James");
    Class2 c2 = new Class2();
   Assert.AreEqual("story", c2.getBook("story", "James"));
    }
}
}

基本上问题是Nunit没有测试它。它找到 dll。加载测试类。但是不要来测试方法。请任何想法...

[TestFixture]
public class TEST
{
   ...