using OpenTap;

namespace AddInPlugin
{
    public static class TestStepHelper
    {
        public static ITestStep GetPreviousStep(this ITestStep step)
        {
            var parent = step.Parent;
            if (parent == null)
            {
                return null;
            }
            var list = parent.ChildTestSteps;
            if (list == null || list.Count <= 0)
            {
                return null;
            }
            int index = list.IndexOf(step);
            if (index == 0)
            {
                return null;
            }
            return list[index - 1];
        }

        public static ITestStep GetNextStep(this ITestStep step)
        {
            var parent = step.Parent;
            if (parent == null)
            {
                return null;
            }
            var list = parent.ChildTestSteps;
            if (list == null || list.Count <= 0)
            {
                return null;
            }
            int index = list.IndexOf(step);
            if (index == list.Count - 1)
            {
                return null;
            }
            return list[index + 1];
        }
    }
}