public void ShouldReturnTrueIfOver18()
        {
            var specification = new IsEighteenSpecification();

            var person = new Person { Age = 18 };

            Assert.IsTrue(specification.IsSatisfiedBy(person));
        }
        public void ShouldReturnFalseIfAccountNotApproved()
        {
            var specification = new IsEighteenSpecification();

            var person = new Person { Age = 17 };

            Assert.IsFalse(specification.IsSatisfiedBy(person));
        }