libcruft-util/test/ascii.cpp

/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * Copyright 2017 Danny Robson <danny@nerdcruft.net>
 */

#include <cruft/util/tap.hpp>

#include <cruft/util/ascii.hpp>

int
main (int, char**)
{
    static constexpr bool T = true;
    static constexpr bool F = false;

    static constexpr struct {
        char character;

        bool is_digit;
        bool is_hex;
        bool is_upper;
        bool is_lower;
        bool is_space;

        int integer;
        unsigned hexadecimal;

        const char *msg;
    } TESTS[] = {
        {  '/', F, F, F, F, F, 0,  0, "/" }, // one below '0'
        {  '0', T, T, F, F, F, 0,  0, "0" },
        {  '9', T, T, F, F, F, 9,  9, "9" },
        {  ':', F, F, F, F, F, 0,  0, ":" }, // one above '9'
        {  '`', F, F, F, F, F, 0,  0, "`" }, // one below 'a'
        {  'a', F, T, F, T, F, 0, 10, "a" },
        {  'f', F, T, F, T, F, 0, 15, "f" },
        {  'g', F, F, F, T, F, 0,  0, "g" },
        {  'A', F, T, T, F, F, 0, 10, "A" },
        {  'F', F, T, T, F, F, 0, 15, "F" },
        {  'G', F, F, T, F, F, 0,  0, "G" },

        {  ' ', F, F, F, F, T, 0,  0, "space" },
        { '\t', F, F, F, F, T, 0,  0, "tab" },
        { '\n', F, F, F, F, T, 0,  0, "newline" },
    };

    return cruft::TAP::logger::run ([] (auto &tap) {
#define TRY_BOOL(X) [&] () -> bool { try { return X; } catch (...) { return false; }; } ()

        for (auto &t: TESTS) {
            bool is_digit = TRY_BOOL(cruft::ascii::is_digit (t.character)) == t.is_digit;
            bool is_hex   = TRY_BOOL(cruft::ascii::is_hex   (t.character)) == t.is_hex;
            bool is_upper = TRY_BOOL(cruft::ascii::is_upper (t.character)) == t.is_upper;
            bool is_lower = TRY_BOOL(cruft::ascii::is_lower (t.character)) == t.is_lower;
            bool is_space = TRY_BOOL(cruft::ascii::is_space (t.character)) == t.is_space;

            bool integer     = !t.is_digit || cruft::ascii::to_integer (t.character) == t.integer;
            bool hexadecimal = !t.is_hex   || cruft::ascii::from_hex   (t.character) == t.hexadecimal;

            tap.expect (
                is_digit && is_hex && is_upper && is_lower && is_space && integer && hexadecimal,
                "{:s}", t.msg
            );
        }

        tap.expect_eq ("6a"_hex2u08, std::vector<uint8_t>({0x6a}), "hex2u8, 1 byte");
        tap.expect_eq ("a6"_hex2array, std::array<uint8_t,1> ({0xa6}), "hex2array, 1 byte");
    });
}