public void given_abc123_assume_skipr_returns_false()
        {
            var filter = new NumberFilter();

            Assert.Equal(false, filter.Skip("abc123"));
        }
        public void given_empty_string_assume_skip_equals_true()
        {
            var filter = new NumberFilter();

            Assert.Equal(true, filter.Skip("   "));
        }
        public void given_3446_assume_skip_returns_true()
        {
            var filter = new NumberFilter();

            Assert.Equal(true, filter.Skip("34567"));
        }