NUnit retry dynamic attribute

Question

Hello I want to pass the number of retries dynamically from app.config value.

The app.config has the following line:

Answer 1

While I am not fully aware of the RetryAttribute. One possible way of achieving the desired functionality would be to extend its current functionality.

/// 

/// RetryDynamicAttribute may be applied to test case in order
/// to run it multiple times based on app setting.
/// 
[AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = false)]
public class RetryDynamicAttribute : RetryAttribute {
    private const int DEFAULT_TRIES = 1;
    static Lazy numberOfRetries = new Lazy(() => {
        int count = 0;
        return int.TryParse(ConfigurationManager.AppSettings["retryTest"], out count) ? count : DEFAULT_TRIES;
    });

    public RetryDynamicAttribute() :
        base(numberOfRetries.Value) {
    }
}

And then apply the custom attribute.

[Test]
[RetryDynamic]
public void Test() {
    //.... 
}