Bddfy trivial samples

namespace Invoicing.BehaviourTests
{
    using TestStack.BDDfy;
    using Xunit;

    public class UnitTest1
    {
        private decimal _result;
        private decimal _value1;
        private decimal _value2;

        [Theory]
        [InlineData(1, 2, 3)]
        [InlineData(1.2, 2.3, 3.5)]
        public void ShouldBeAbleToAddTwoNumbers(decimal value1, decimal value2, decimal result) =>
            this.Given(_ => _.GivenIHaveTwoValues(value1, value2))
                .When(_ => _.WhenIAddThem())
                .Then(_ => _.ThenIGetTheExpectedResult(result))
                .BDDfy();

        private void GivenIHaveTwoValues(decimal value1, decimal value2)
        {
            _value1 = value1;
            _value2 = value2;
        }

        private void WhenIAddThem() => _result = _value1 + _value2;
        private void ThenIGetTheExpectedResult(decimal result) => Assert.Equal(_result, result);
    }
}

namespace Invoicing.BehaviourTests
{
    using System;
    using TestStack.BDDfy;
    using Xunit;

    public class Class1
    {
        [Fact]
        public void CreatingCorrectionForBillingItemWhenSumOfInvoicedBillingItemsIsGreaterThan0()
        {
            var test = 1;
            var test2 = "Marcin";
            this.Given(_ => _.SettledBillingItem1(test))
                .And(_ => _.NotInvoicedBillingItem2(test2))
                .And(_ => _.BillingItem2HasAReservationId())
                .When(_ => _.BillingItem2IsInvoiced())
                .And(_ => _.BillingItem2_ReservationIdEqualsBillingItem1_ReservationId())
                .And(_ => _.TotalToPayIsGreaterThan0())
                .Then(_ => _.BillingItem2IsInvoicedAsInvoiceAndWillBeAttachedToAttachment())
                .WithExamples(new ExampleTable("test", "test2")
                {
                    {11, "Marcin2" },
                    {2221, "Marcin222" }
                })
                .BDDfy();
        }

        private void BillingItem2IsInvoicedAsInvoiceAndWillBeAttachedToAttachment() =>
            throw new NotImplementedException();

        private void BillingItem2HasAReservationId() => throw new NotImplementedException();
        private void NotInvoicedBillingItem2(string s) => throw new NotImplementedException();
        private void SettledBillingItem1(int a) => throw new NotImplementedException();
        private void BillingItem2IsInvoiced() => throw new NotImplementedException();

        private void BillingItem2_ReservationIdEqualsBillingItem1_ReservationId() =>
            throw new NotImplementedException();

        private void TotalToPayIsGreaterThan0() => throw new NotImplementedException();
    }
}