using System;
using System.Globalization;
using UnitTestSharp;

namespace Glass.UnitTests
{
    public class NumberFieldBehaviorTests : TestFixture
    {
        public class CultureTests : TestFixture
        {
            public void DefaultsToInvariant()
            {
                CheckEqual(CultureInfo.InvariantCulture, new NumberFieldBehavior().Culture);
            }

            public void Assigned_IsKept()
            {
                CultureInfo french = CultureInfo.GetCultureInfo("fr-FR");
                CheckEqual(french, new NumberFieldBehavior { Culture = french }.Culture);
            }

            public void Null_Throws()
            {
                var behavior = new NumberFieldBehavior();

                CheckThrow(typeof(ArgumentNullException));
                behavior.Culture = null;
            }
        }

        public class ScrubDistancePerStepTests : TestFixture
        {
            public void DefaultsToEight()
            {
                CheckEqual(8, new NumberFieldBehavior().ScrubDistancePerStep);
            }

            public void Assigned_IsKept()
            {
                CheckEqual(3, new NumberFieldBehavior { ScrubDistancePerStep = 3 }.ScrubDistancePerStep);
            }

            public void Zero_Throws()
            {
                var behavior = new NumberFieldBehavior();

                CheckThrow(typeof(ArgumentOutOfRangeException));
                behavior.ScrubDistancePerStep = 0;
            }

            public void NaN_Throws()
            {
                var behavior = new NumberFieldBehavior();

                CheckThrow(typeof(ArgumentOutOfRangeException));
                behavior.ScrubDistancePerStep = double.NaN;
            }

            public void Rejected_LeavesTheDistanceAlone()
            {
                var behavior = new NumberFieldBehavior();

                try
                {
                    behavior.ScrubDistancePerStep = 0;
                }
                catch (ArgumentOutOfRangeException)
                {
                }

                CheckEqual(8, behavior.ScrubDistancePerStep);
            }
        }
    }
}