public void the_hash_can_be_verified()
 {
     Assert.DoesNotThrow(() => _newtable.VerifyFileHash());
 }
        public void the_hash_is_invalid()
        {
            var exc = Assert.Throws <CorruptIndexException>(() => _table.VerifyFileHash());

            Assert.IsInstanceOf <HashValidationException>(exc.InnerException);
        }