namespace NUnit.Framework.Internal { internal abstract class ValueGenerator { public abstract class Step { public abstract bool IsPositive { get; } public abstract bool IsNegative { get; } protected Step(); } public abstract IEnumerable GenerateRange(object start, object end, Step step); public static ValueGenerator Create(Type valueType); public static ValueGenerator<T> Create<[System.Runtime.CompilerServices.Nullable(2)] T>(); public abstract Step CreateStep(object value); public abstract bool TryCreateStep(object value, out Step step); protected ValueGenerator(); } }