Passing dynamically generated value to NUnit Custom Attribute

问题

For our test scenarios - based on configuration of the application, we may want to either enable or disable a scenario. For this purpose, I created a custom IgnoreIfConfig Attribute like this :

public class IgnoreIfConfigAttribute : Attribute, ITestAction
{
    public IgnoreIfConfigAttribute(string config)
    {
        _config = config;
    }
    public void BeforeTest(ITest test)
    {
        if (_config != "Enabled") NUnit.Framework.Assert.Ignore("Test is Ignored due to Access level");
    }
    public void AfterTest(ITest test)
    { 

    }
    public ActionTargets Targets { get; private set; }
    public string _config { get; set; }
}

Which can be used as follows :

    [Test, Order(2)]
    [IgnoreIfConfig("Enabled")] //Config.Enabled.ToString()
    public void TC002_DoTHisIfEnabledByConfig()
    {

    }

Now This attribute would only take a constant string as an input. If I were to replace this with something generated dynamically at the runtime, Such as a value from Json file - How can I convert it to a Constant. Constant Expression, TypeOf Expression or Array Creation Expression of Attribute parameter type ? Such as Config.Enabled ?

回答1:

You can't do as you asked but you can look at the problem differently. Just give the attribute the name of some property in the JSON file to be examined, e.g. "Config".

回答2:

As per Charlie's suggestion : I implemented it like this -

PropCol pc = new PropCol(); // Class where the framework reads Json Data.
public IgnoreIfConfigAttribute(string config)
{
    pc.ReadJson();
    if(config = "TestCase") _config = PropCol.TestCase;
    // Here TestCase is a Json element which is either enabled or disabled.
}

来源：https://stackoverflow.com/questions/47354926/passing-dynamically-generated-value-to-nunit-custom-attribute