Function test_ascii_utilities

scripts/test_stringzilla.cpp:1191–1239

 */
template <typename string_type>
void test_ascii_utilities() {

    using str = string_type;

    assert("aaa"_bs.size() == 1ull);
    assert("\0\0"_bs.size() == 1ull);
    assert("abc"_bs.size() == 3ull);
    assert("a\0bc"_bs.size() == 4ull);

    assert(!"abc"_bs.contains('\0'));
    assert(str("bca").contains_only("abc"_bs));

    assert(!str("").is_alpha());
    assert(str("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ").is_alpha());
    assert(!str("abc9").is_alpha());

    assert(!str("").is_alnum());
    assert(str("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789").is_alnum());
    assert(!str("abc!").is_alnum());

    assert(str("").is_ascii());
    assert(str("\x00x7F").is_ascii());
    assert(!str("abc123🔥").is_ascii());

    assert(!str("").is_digit());
    assert(str("0123456789").is_digit());
    assert(!str("012a").is_digit());

    assert(!str("").is_lower());
    assert(str("abcdefghijklmnopqrstuvwxyz").is_lower());
    assert(!str("abcA").is_lower());
    assert(!str("abc\n").is_lower());

    assert(!str("").is_space());
    assert(str(" \t\n\r\f\v").is_space());
    assert(!str(" \t\r\na").is_space());

    assert(!str("").is_upper());
    assert(str("ABCDEFGHIJKLMNOPQRSTUVWXYZ").is_upper());
    assert(!str("ABCa").is_upper());

    assert(str("").is_printable());
    assert(str("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!@#$%^&*()_+").is_printable());
    assert(!str("012🔥").is_printable());

    assert(str("").contains_only("abc"_bs));
    assert(str("abc").contains_only("abc"_bs));
    assert(!str("abcd").contains_only("abc"_bs));
}

inline void expect_equality(char const *a, char const *b, std::size_t size) {
    if (std::memcmp(a, b, size) == 0) return;