public void IsOneOf()
        {
            var sut = new RegexFunctions();

            sut.IsOneOf("ABC", "ABC|DEF|GHI").Should().BeTrue();
        }
        public void IsNotOneOf()
        {
            var sut = new RegexFunctions();

            sut.IsOneOf("OPQ", "ABC|DEF|GHI").Should().BeFalse();
        }