using UnitTestSharp;

namespace Vellum.Generator.UnitTests
{
    public class BaseArgumentsTests : TestFixture
    {
        public static BaseArguments Variant(string name = "Herd<MemberType>", int firstChild = 2, int childCount = 1)
        {
            return new BaseArguments(name, firstChild, childCount);
        }

        public class CtorTests : TestFixture
        {
            public void KeepsEveryArgument()
            {
                BaseArguments arguments = Variant();

                CheckEqual("Herd<MemberType>", arguments.Name);
                CheckEqual(2, arguments.FirstChild);
                CheckEqual(1, arguments.ChildCount);
            }
        }

        public class EqualsTests : TestFixture
        {
            public void SameValues_AreEqual()
            {
                CheckTrue(Variant().Equals(Variant()));
                CheckTrue(Variant().Equals((object)Variant()));
            }

            public void Null_IsNotEqual()
            {
                CheckFalse(Variant().Equals((BaseArguments)null));
                CheckFalse(Variant().Equals((object)null));
            }

            public void DifferentName_IsNotEqual()
            {
                CheckFalse(Variant().Equals(Variant(name: "Other<ItemType>")));
            }

            public void DifferentFirstChild_IsNotEqual()
            {
                CheckFalse(Variant().Equals(Variant(firstChild: 3)));
            }

            public void DifferentChildCount_IsNotEqual()
            {
                CheckFalse(Variant().Equals(Variant(childCount: 2)));
            }
        }

        public class GetHashCodeTests : TestFixture
        {
            public void EqualArguments_HaveEqualHashCodes()
            {
                CheckEqual(Variant().GetHashCode(), Variant().GetHashCode());
            }
        }
    }
}