NUnit CollectionAssert.AreEqual(应为，实际)与Assert.IsTTrue(应为.Seq

我有一些对象被放入队列中。队列中的所有对象都实现相同的基本接口，这也要求它们实现IEquatable<>。

我想验证队列中是否按正确的顺序放置了正确的对象。

当我编写一个使断言为CollectionAssert.AreEqual(expected,actual)的测试时，该测试失败，并指出，虽然队列是预期的长度，但它在索引0处不同。

但是，当我将测试断言写成Assert.IsTrue(expected.SequenceEqual(actual))时，测试就通过了。

在我看来，这两个断言应该是相同的，但显然它们完全不同。

NUnit的网站上并没有非常详细地介绍集合断言方法，而Linq文档虽然更详细，但如果不能与NUnit使用集合断言方法所做的事情进行比较，就没有真正的帮助。

这两个断言有何不同？

编辑-添加详细信息

以下是正在测试的代码以及我希望得到相同结果的两个测试。

public enum ArgumentTypeEnum
{
    SpiceworksDbName,
    DestinationDbName,
    DestinationServerName
}
public interface IArgument : IEquatable<IArgument>
{
}
public interface ICommandArgument : IArgument
{
    ArgumentTypeEnum ArgumentType { get; }
}
internal interface IValueArgument : IArgument
{
    String ArgumentValue { get; }
}
public class CommandArgument : ICommandArgument
{
    public CommandArgument(ArgumentTypeEnum argumentType) {
        ArgumentType = argumentType;
    }
    public ArgumentTypeEnum ArgumentType { get; private set; }
    public bool Equals(IArgument other)
    {
        if (other == null)
        {
            return false;
        }
        var otherAsCommandArg = other as CommandArgument;
        if (otherAsCommandArg == null)
        {
            return false;
        }
        return ArgumentType == otherAsCommandArg.ArgumentType;
    }
}
public class ValueArgument : IValueArgument
{
    public ValueArgument(String argumentValue)
    {
        ArgumentValue = argumentValue;
    }
    public string ArgumentValue { get; private set; }
    public bool Equals(IArgument other)
    {
        if (other == null)
        {
            return false;
        }
        var otherAsValueArg = other as ValueArgument;
        if (otherAsValueArg == null)
        {
            return false;
        }
        return ArgumentValue == otherAsValueArg.ArgumentValue;
    }
}
public class Tokenizer
{
     public Queue<IArgument> TokenizeArguments(string[] args) {
        var tokenQueue = new Queue<IArgument>();
        args.ToList().ForEach((arg) => {
                if (arg.StartsWith("-"))
                {
                    switch (arg)
                    {
                        case "-sd":
                            tokenQueue.Enqueue(new CommandArgument(ArgumentTypeEnum.SpiceworksDbName));
                            break;
                        case "-dd":
                            tokenQueue.Enqueue(new CommandArgument(ArgumentTypeEnum.DestinationDbName));
                            break;
                        case "-ds":
                            tokenQueue.Enqueue(new CommandArgument(ArgumentTypeEnum.DestinationServerName));
                            break;
                        default:
                            tokenQueue.Enqueue(new ValueArgument(arg));
                            break;
                    }
                }
                else
                {
                    tokenQueue.Enqueue(new ValueArgument(arg));
                }
            });
        return tokenQueue;
    }
}
[TestFixture]
public class TokenizerSpecs
{
    ///Passes
    [Test] 
    public void Tokenizer_MultipleCommandsAndValues_TokenizesAsExpected1() {
        var args = new[]
        {
            "-sd", @"''some'Directory'foo.db", "-dd", "some database name", "-ds", "Server.name", "somerandomarg",
            "-unreconized"
        };
        var t = new Tokenizer();
        var actualResult = t.TokenizeArguments(args);
        var expectedResult = new Queue<IArgument>();
        expectedResult.Enqueue(new CommandArgument(ArgumentTypeEnum.SpiceworksDbName));
        expectedResult.Enqueue(new ValueArgument(@"''some'Directory'foo.db"));
        expectedResult.Enqueue(new CommandArgument(ArgumentTypeEnum.DestinationDbName));
        expectedResult.Enqueue(new ValueArgument("some database name"));
        expectedResult.Enqueue(new CommandArgument(ArgumentTypeEnum.DestinationServerName));
        expectedResult.Enqueue(new ValueArgument("Server.name"));
        expectedResult.Enqueue(new ValueArgument("somerandomarg"));
        expectedResult.Enqueue(new ValueArgument("-unreconized"));
        Assert.IsTrue(expectedResult.SequenceEqual(actualResult));
    }
    ///Fails
    [Test]
    public void Tokenizer_MultipleCommandsAndValues_TokenizesAsExpected2()
    {
        var args = new[]
        {
            "-sd", @"''some'Directory'foo.db", "-dd", "some database name", "-ds", "Server.name", "somerandomarg",
            "-unreconized"
        };
        var t = new Tokenizer();
        var actualResult = t.TokenizeArguments(args);
        var expectedResult = new Queue<IArgument>();
        expectedResult.Enqueue(new CommandArgument(ArgumentTypeEnum.SpiceworksDbName));
        expectedResult.Enqueue(new ValueArgument(@"''some'Directory'foo.db"));
        expectedResult.Enqueue(new CommandArgument(ArgumentTypeEnum.DestinationDbName));
        expectedResult.Enqueue(new ValueArgument("some database name"));
        expectedResult.Enqueue(new CommandArgument(ArgumentTypeEnum.DestinationServerName));
        expectedResult.Enqueue(new ValueArgument("Server.name"));
        expectedResult.Enqueue(new ValueArgument("somerandomarg"));
        expectedResult.Enqueue(new ValueArgument("-unreconized"));
        CollectionAssert.AreEqual(expectedResult, actualResult);
    }
}

var n = new NUnitEqualityComparer();
var tolerance = Tolerance.Zero;
var equal = n.AreEqual(new CommandArgument(ArgumentTypeEnum.SpiceworksDbName),
                       new CommandArgument(ArgumentTypeEnum.SpiceworksDbName),
                       ref tolerance);