如何测试表达式的相等性

问题描述

如何测试这两个表达式与此示例相同

How to test that two expressions are the same like this sample

        string firstname = "Ahmed";
        Expression<Func<string, bool>> exp1 = (s) => s.Contains(firstname);
        Expression<Func<string, bool>> exp2 = (s) => s.Contains(firstname);

        Console.WriteLine(exp1 == exp2);//print false as two references are no equal

现在如何确保expression1等于expression2，因为它们具有相同的条件？

now how to ensure that expression1 equals to expression2 , as they have the same criteria?

推荐答案

是 ExpressionEqualityComparer 的代码，可以显示如何执行。

Here is the code for ExpressionEqualityComparer which can show how to do it.

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