使用Reflection在测试方法内部读取类别属性 [英] Reading Category attribute inside test method using Reflection

问题描述

我试图使用 TestMethod 自定义属性的category属性通过使用反射读取.dll来添加测试方法，如下所示：

I'm trying to add test methods using the category property of the TestMethod custom attribute by reading a .dll using reflection, something like this:

如果测试方法是：

[TestMethod, Category("xyz"), Category("abc")]
public void VerifySomething()
{
   //some code
}

我正在使用这样的反射读取.dll：

I'm reading the .dll using reflection like this:

 Assembly _assembly = Assembly.LoadFile(AssembleyPath);
            Type[] types = _assembly.GetExportedTypes();
            foreach (Type type in types)
            {
                Attribute _classAttribute = type.GetCustomAttribute(typeof(TestClassAttribute));
                if (_classAttribute != null)
                {
                    TreeNode _n = new TreeNode();
                    _n.Text = type.Name;
                    if (type.Name.ToLower().Contains("testbase"))
                        // For exculding test base class from tree node list
                        continue;
                    MemberInfo[] members =
                        type.GetMembers(BindingFlags.Public | BindingFlags.Instance | BindingFlags.InvokeMethod);
                    foreach (MemberInfo member in members)
                    {

                            Attribute _att = member.GetCustomAttribute(typeof(TestMethodAttribute));
                            if (_att != null)
                            {
                                TestMethod _t = new TestMethod(member.Name);

                            }

                    }
                 }
            }

使用这个我无法添加由特定类别过滤的树视图节点中的测试方法。
基本上我想要的是从dll读取TestCategoryAttribute，它的值类似于xyz或abc根据我上面提到的例子，然后基于过滤器（TestCategoryAttribute）值我想加载方法从dll并将它们添加到treeview节点。

Using this i'm unable to add test methods filtered by particular category inside treeview node. Basically all i want is to read TestCategoryAttribute from dll which has value something like "xyz" or "abc" as per the example i've mentioned above and then based on the filter (TestCategoryAttribute) value i would want to load methods from the dll and add them to the treeview node. Can anybody please guide me how can i achieve that.

推荐答案

这是如何获得一个 TestMethod 作为 MethodInfo 从 Reflection 。

This is how to get a TestMethod as a MethodInfo from Reflection.

var _t= typeof(testClass).GetMethod(methodName); // testClass should be the type in your foreach

给定一个 TestMethod _t （假设一切正常到那里），你可以得到以下类别

Given a TestMethod _t (assuming everything is right till there), you can get the categories with the following

var testCategories = IEnumerable<TestCategoryAttribute>)_t.GetCustomAttributes(typeof(TestCategoryAttribute), true));

如何根据某些条件过滤它们？
执行Linq 任何

How to filter them based on some conditions? Does a Linq Any do the trick?

    if testCategories.Any(c => c == "xyz" || c == "abc") )
    {
        // then add to the treeview node, etc...

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