using System;
using NUnit.Framework;

namespace ChadSoft.Validation
{
    [TestFixture]
    public class RangeValidatorTests
    {
        [Test]
        public void Returns_false_for_value_over_max_range()
        {
            Assert.IsFalse(new RangeValidatorAttribute(0, 2).IsValid(3));
        }
        [Test]
        public void Returns_false_for_value_under_min_range()
        {
            Assert.IsFalse(new RangeValidatorAttribute(0, 2).IsValid(-1));
        }
        [Test]
        public void Returns_true_for_int_in_range()
        {
            Assert.IsTrue(new RangeValidatorAttribute(0, 2).IsValid(1));
        }
        [Test]
        public void Returns_true_for_value_as_max_value()
        {
            Assert.IsTrue(new RangeValidatorAttribute(0, 2).IsValid(2));
        }
        [Test]
        public void Returns_true_for_doubles_in_range()
        {
            Assert.IsTrue(new RangeValidatorAttribute(0.0, 2.1).IsValid(1.9));
        }

        [Test]
        public void Returns_true_for_DateTimes_in_range()
        {
            Assert.IsTrue(new RangeValidatorAttribute(DateTime.Now.AddDays(-1), DateTime.Now.AddDays(1))
                              .IsValid(DateTime.Now));
        }

        [Test]
        [ExpectedException(typeof(ArgumentNullException))]
        public void Null_ranges_throw_exception()
        {
            new RangeValidatorAttribute(null, null);
        }
        [Test]
        [ExpectedException(typeof(ArgumentNullException))]
        public void Null_min_range_throw_exception()
        {
            new RangeValidatorAttribute(null, 1);
        }
        [Test]
        [ExpectedException(typeof(ArgumentNullException))]
        public void Null_max_range_throw_exception()
        {
            new RangeValidatorAttribute(2, null);
        }
        [Test]
        [ExpectedException(typeof(ArgumentException), 
         ExpectedMessage = "Min and Max values must be the same type.")]
        public void Min_and_max_of_different_types_throws_exception()
        {
            new RangeValidatorAttribute(2, DateTime.Now);
        }

    }
}