public void SingletonNTest()
{
SingletonN s1 = SingletonN.GetInstance();
SingletonN s2 = SingletonN.GetInstance();
SingletonN s3 = SingletonN.GetInstance();
Assert.IsNull(s3);
Assert.AreNotEqual(s1.GetHashCode(), s2.GetHashCode());
s1.Deactivate();
s3 = SingletonN.GetInstance();
Assert.IsNotNull(s3);
Assert.IsTrue(s3.GetHashCode() == s1.GetHashCode() ||
s3.GetHashCode() == s2.GetHashCode());
}
public void Test()
{
SingletonN s1 = SingletonN.Instance;
SingletonN s2 = SingletonN.Instance;
SingletonN s3 = SingletonN.Instance;
// 超出容量，所以不能获得实例引用
Assert.IsNull(s3);
// 两个不同实例
Assert.AreNotEqual <int>(s1.GetHashCode(), s2.GetHashCode());
s1.DeActivate();
s3 = SingletonN.Instance;
Assert.IsNotNull(s3); // 有了空间，所以可以获得引用
s2.DeActivate();
Assert.IsNotNull(s3); // 有了空间，所以可以获得引用
// s3虽然获得了新的引用，但其实是之前已经创建的某个现成的
Assert.IsTrue((s3.GetHashCode() == s1.GetHashCode()) ||
(s3.GetHashCode() == s2.GetHashCode()));
}
