using Calculator.Domain;
using MbUnit.Framework;

namespace Calculator.Test.domain
{
    [TestFixture]
    public class NumberTest
    {
        private INumber CreateSUT(double value)
        {
            return new Number(value);
        }

        [RowTest]
        [Row(1, 2, 3)]
        [Row(9, 9, 18)]
        public void should_be_able_to_add_to_numbers_together(long augend, long addend, long expectedResult)
        {
            INumber leftNumber = CreateSUT(augend);
            INumber rightNumber = CreateSUT(addend);

            Assert.AreEqual(CreateSUT(expectedResult), leftNumber.Plus(rightNumber));
        }

        [RowTest]
        [Row(6, 5, 1)]
        [Row(9, 9, 0)]
        public void should_be_able_to_subtract_one_number_from_another(double left, double right, double expectedResult)
        {
            INumber leftNumber = CreateSUT(left);
            INumber rightNumber = CreateSUT(right);

            Assert.AreEqual(CreateSUT(expectedResult), leftNumber.Minus(rightNumber));
        }
    }
}