我曾经像这样比较列表,但它在测试中返回 false:
Assert.IsTrue(expected.SequenceEquals(actual));
并尝试转换为 json 并且成功了:
Assert.AreEqual(expected.ToJson(), actual.ToJson());
值(value)观似乎是平等的,有什么不同?如何找出列表中的不同之处?
更新:
我的类(class):
public class Department
{
[BsonId]
public ObjectId Id { get; set; }
public string Name { get; set; }
public override string ToString()
{
return Id.ToString();
}
}
最佳答案
如果MyClass
工具 IEquatable<MyClass>
,然后试试这个:
expected.Sort();
actual.Sort();
if (Enumerable.SequenceEqual(actual, expected)) { ... }
如果它没有实现IEquatable
那么您可能会遇到奇怪的行为,因为对象引用将在两个列表中进行比较,而不是它们的字段:
using System;
using System.Collections.Generic;
using System.Linq;
public class MyClassA
{
private int i;
public MyClassA(int i) { this.i = i; }
}
public class MyClassB : IEquatable<MyClassB>
{
private int i;
public MyClassB(int i) { this.i = i; }
public bool Equals(MyClassB other) { return this.i == other.i; }
}
public class Program
{
public static void Main()
{
var actual1 = new List<MyClassA>() { new MyClassA(1), new MyClassA(2), new MyClassA(3) };
var expected1 = new List<MyClassA>() { new MyClassA(1), new MyClassA(2), new MyClassA(3) };
Console.WriteLine(Enumerable.SequenceEqual(actual1, expected1));
var a1 = new MyClassA(1);
var a2 = new MyClassA(2);
var a3 = new MyClassA(3);
var actual2 = new List<MyClassA>() { a1, a2, a3 };
var expected2 = new List<MyClassA>() { a1, a2, a3 };
Console.WriteLine(Enumerable.SequenceEqual(actual2, expected2));
var actual3 = new List<MyClassB>() { new MyClassB(1), new MyClassB(2), new MyClassB(3) };
var expected3 = new List<MyClassB>() { new MyClassB(1), new MyClassB(2), new MyClassB(3) };
Console.WriteLine(Enumerable.SequenceEqual(actual3, expected3));
var actual4 = new List<MyClassB>() { new MyClassB(1), new MyClassB(2), new MyClassB(3) };
var expected4 = new List<MyClassB>() { new MyClassB(3), new MyClassB(2), new MyClassB(1) };
Console.WriteLine(Enumerable.SequenceEqual(actual4, expected4));
}
}
输出:
False
True
True
False
关于c# - 比较两个 List<MyClass> : How to find out difference?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8415602/