using Amphora;
using System;
using UnitTestSharp;

namespace Susurrus.UnitTests
{
    public class DetailFailureKindTests : TestFixture
    {
        public static readonly DetailFailureKind Sample =
            new DetailFailureKind("Susurrus.UnitTests.Detail", "Problem: {0}.");

        public static readonly DetailFailureKind Other =
            new DetailFailureKind("Susurrus.UnitTests.OtherDetail", "Other: {0}.");

        public class CtorTests : TestFixture
        {
            public void KeepsItsNameAndTemplate()
            {
                CheckEqual("Susurrus.UnitTests.Detail", Sample.Name);
                CheckEqual("Problem: {0}.", Sample.Template);
            }

            public void NullTemplate_Throws()
            {
                CheckThrow(typeof(ArgumentNullException));
                new DetailFailureKind("Susurrus.UnitTests.Untemplated", template: null);
            }
        }

        public class FailTests : TestFixture
        {
            public void ReturnsAFailureOfThisKind()
            {
                Status status = Sample.Fail("the cause");

                CheckFalse(status.IsOk);
                CheckTrue(ReferenceEquals(Sample, status.Kind));
            }

            public void NullDetail_Throws()
            {
                CheckThrow(typeof(ArgumentNullException));
                Sample.Fail(null);
            }
        }

        public class DetailOfTests : TestFixture
        {
            public void ReturnsTheDetailTheFailureCarries()
            {
                Status status = Sample.Fail("the cause");

                CheckEqual("the cause", Sample.DetailOf(in status));
            }

            public void AFailureOfAnotherKind_Throws()
            {
                Status status = Other.Fail("the cause");

                CheckThrow(typeof(ArgumentException));
                Sample.DetailOf(in status);
            }
        }

        public class DescribeTests : TestFixture
        {
            public void PutsTheDetailInTheTemplate()
            {
                CheckEqual("Problem: the cause.", Sample.Fail("the cause").Describe());
            }
        }
    }
}