using FluentAssertions;
using FluentAssertions.Assertions;

namespace Developpez.Dotnet.Tests
{
    public static class TestExtensions
    {
        public static AndConstraint<NumericAssertions<T?>> BeNull<T>(this NumericAssertions<T?> assertion)
            where T : struct
        {
            if (assertion.Subject != null)
                Execute.Verification.FailWith("Expected null value, but was not null");
            return new AndConstraint<NumericAssertions<T?>>(assertion);
        }

        public static AndConstraint<NumericAssertions<T?>> NotBeNull<T>(this NumericAssertions<T?> assertion)
            where T : struct
        {
            if (assertion.Subject == null)
                Execute.Verification.FailWith("Expected non-null value, but was null");
            return new AndConstraint<NumericAssertions<T?>>(assertion);
        }

        public static AndConstraint<NumericAssertions<T>> Be<T>(this NumericAssertions<T> assertion, T value)
        {
            if (assertion.Subject == null || assertion.Subject.CompareTo(value) != 0)
                Execute.Verification.FailWith("Expected {0}, but was {1}", value, assertion.Subject ?? "null");
            return new AndConstraint<NumericAssertions<T>>(assertion);
        }
    }
}