#include <catch2/catch_all.hpp>

#include <monoformat_utf8.hpp>

TEST_CASE("TestUTF8.SimpleIterator") {
    int i = 0;
    for (std::uint32_t cp : monoformat::UTF8Iterator(std::string_view{"abc"})) {
        if (i == 0) {
            CHECK(cp == 'a');
        } else if (i == 1) {
            CHECK(cp == 'b');
        } else if (i == 2) {
            CHECK(cp == 'c');
        }
        ++i;
    }
    CHECK(i == 3);
    i = 0;
    for (std::uint32_t cp : monoformat::UTF8Iterator(std::string_view{"\xe2\x98\x83"})) {
        if (i == 0) {
            CHECK(cp == 0x2603);
        }
        ++i;
    }
    CHECK(i == 1);
}

TEST_CASE("TestUTF8.Invalid") {
    int i = 0;
    for (std::uint32_t cp : monoformat::UTF8Iterator(std::string_view{"\x80\xe2\x98\x83\xe2\x98"})) {
        if (i == 0) {
            CHECK(cp == ~std::uint32_t{0});
        } else if (i == 1) {
            CHECK(cp == 0x2603);
        } else if (i == 2) {
            CHECK(cp == ~std::uint32_t{0});
        }
        ++i;
    }
    CHECK(i == 3);
}