[英]Compare two List which in Unit test
我有两个列表,其中包含两个 User 对象。
列表中的对象的值相同。
但是当我检查这个列表时,单元测试返回CollectionAssert.AreEqual
失败。 (索引 0 处的元素不匹配)。
我认为CollectionAssert.AreEqual
方法不会检查列表的值,而是检查引用。
我的问题是如何比较单元测试中的两个列表的值?
public class User
{
public string Name { get; set; }
public string Password { get; set; }
}
[TestMethod]
public void CheckUserList()
{
List<User> users = new List<User>()
{
new User(){ Name="Name", Password="Pass" },
new User(){ Name="Name1", Password="Pass1" },
new User(){ Name="Name2", Password="Pass2" },
};
List<User> users1 = new List<User>()
{
new User(){ Name="Name", Password="Pass" },
new User(){ Name="Name1", Password="Pass1" },
new User(){ Name="Name2", Password="Pass2" },
};
CollectionAssert.AreEqual(users, users1);
}
我认为您需要为您的User
类覆盖==
运算符或Equals()
方法。
public class User
{
public string Name { get; set; }
public string Password { get; set; }
public override bool Equals(object obj)
{
if (obj is User another)
{
return Name == another.Name && Password == another.Password;
}
return base.Equals(obj);
}
public static bool operator ==(User left, User right)
{
return left.Equals(right);
}
public static bool operator !=(User left, User right)
{
return !left.Equals(right);
}
}
Equal 和 GetHashCode 方法就足够了。 然后 CollectionAssert.AreEqual 将按您的预期工作
public class User
{
public string Name { get; set; }
public string Password { get; set; }
public override bool Equals(object obj)
{
var user = obj as User;
return user != null &&
Name == user.Name &&
Password == user.Password;
}
public override int GetHashCode()
{
var hashCode = 1290039854;
hashCode = hashCode * -1521134295 + EqualityComparer<string>.Default.GetHashCode(Name);
hashCode = hashCode * -1521134295 + EqualityComparer<string>.Default.GetHashCode(Password);
return hashCode;
}
}
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