我在这几个类和接口中无法得到所需的行为。
以下是我的问题,
//Inside a Unit Test that has access to internal methods and properties
INode firstNode, secondNode;
INodeId id = new NodeId (4);
first = new Node (id, "node");
second = new Node (id, "node");
Assert.IsTrue (first == second);
上述断言失败的原因是似乎调用了对象类的equals方法,而不是Node和NodeId类中重载的运算符。
如果您对如何获得所需行为有任何建议,那将非常棒。
这是我正在工作的框架的一部分:
public interface IIdentifier<T> where T : class
{
TKeyDataType GetKey<TKeyDataType> ();
bool Equals (IIdentifier<T> obj;
}
public interface INode
{
string name
{
get;
}
INodeId id
{
get;
}
}
public interface INodeId : IIdentifier<INode>
{
}
public class Node : INode
{
internal Node(INodeId id, string name)
{
//Work
}
public static bool operator == (Node n1, Node n2)
{
return n1.equals(n2);
}
public static bool operator != (Node n1, Node n2)
{
return !n1.equals(n2);
}
public bool Equals (INode node)
{
return this.name == node.name &&
this.id = node.id;
}
#region INode Properties
}
public class NodeId : INodeId
{
internal NodeId(int id)
{
//Work
}
public static bool operator == (NodeId n1, NodeId n2)
{
return n1.equals(n2);
}
public static bool operator != (NodeId n1, NodeId n2)
{
return !n1.equals(n2);
}
public override bool Equals (object obj)
{
return this.Equals ((IIdentifier<INode>) obj);
}
public bool Equals (IIdentifier<INode> obj)
{
return obj.GetKey<int>() == this.GetKey<int>();
}
public TKeyDataType GetKey<TKeyDataType> ()
{
return (TKeyDataType) Convert.ChangeType (
m_id,
typeof (TKeyDataType),
CultureInfo.InvariantCulture);
}
private int m_id;
}
GetHashCode()
方法。对于这种情况,NodeId
只需返回m_id.GetHashCode()
,而Node
则需要计算成员字段的组合。Jon Skeet 在这里有一个很棒的实现:https://dev59.com/EnVC5IYBdhLWcg3wihqv#263416 - Jesse C. Slicer