HexDump_test.cc

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#include "catch.hpp"
 
#include "HexDump.hh"
 
#include "ranges.hh"
 
#include <bit>
 
static void test_decode(const std::string& encoded, const std::string& decoded)
{
        auto buf = HexDump::decode(encoded);
        REQUIRE(buf.size() == decoded.size());
        CHECK(ranges::equal(std::span{buf}, decoded));
}
 
static void test(const std::string& decoded, const std::string& encoded)
{
        CHECK(HexDump::encode(std::span{std::bit_cast<const uint8_t*>(decoded.data()),
                                        decoded.size()})
              == encoded);
        test_decode(encoded, decoded);
}
 
TEST_CASE("HexDump")
{
        test("", "");
        test("a", "61");
        test("ab", "61 62");
        test("abc", "61 62 63");
        test("0123456789", "30 31 32 33 34 35 36 37 38 39");
        test("abcdefghijklmnopqrstuvwxyz",
             "61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70\n"
             "71 72 73 74 75 76 77 78 79 7A");
        test("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",
             "30 31 32 33 34 35 36 37 38 39 41 42 43 44 45 46\n"
             "47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54 55 56\n"
             "57 58 59 5A 61 62 63 64 65 66 67 68 69 6A 6B 6C\n"
             "6D 6E 6F 70 71 72 73 74 75 76 77 78 79 7A");
        test("111111111111111111111111111111111111111111111111111111111111111111111111111111"
             "111111111111111111111111111111111111111111111111111111111111111111111111111111"
             "111111111111111111111111111111111111111111111111111111111111111111111111111111"
             "111111111111111111111111111111111111111111111",
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31 31 31 31 31 31 31 31 31 31\n"
             "31 31 31 31 31 31 31");
 
        // Decode-only:
        // - extra newlines don't matter
        test_decode("30 31\n32\n33 34", "01234");
        // - no spaces in between is fine as well
        test_decode("3031323334", "01234");
        // - any non [0-9][a-f][A-F] character is ignored
        test_decode("30|31G32g33+34", "01234");
        // - lower-case [a-f] is allowed
        test_decode("4A+4b4c\n4d", "JKLM");
}