Interface IImplyFixture
IImplyFixture is an empty marker interface used by attributes like TestAttribute that cause the class where they are used to be treated as a TestFixture even without a TestFixtureAttribute.
Marker interfaces are not usually considered a good practice, but we use it here to avoid cluttering the attribute hierarchy with classes that don't contain any extra implementation.
Namespace: NUnit.Framework.Interfaces
Assembly: nunit.framework.dll
Syntax
public interface IImplyFixture