osrm-backend/test/t/repeated_packed_enum/reader_test_cases.cpp

#include <test.hpp>

TEST_CASE("read repeated packed enum field: empty") {
    const std::string buffer = load_data("repeated_packed_enum/data-empty");

    protozero::pbf_reader item{buffer};

    REQUIRE_FALSE(item.next());
}

TEST_CASE("read repeated packed enum field: one") {
    const std::string buffer = load_data("repeated_packed_enum/data-one");

    protozero::pbf_reader item{buffer};

    REQUIRE(item.next());
    const auto it_range = item.get_packed_enum();
    REQUIRE_FALSE(item.next());

    REQUIRE(it_range.begin() != it_range.end());
    REQUIRE(*it_range.begin() == 0 /* BLACK */);
    REQUIRE(std::next(it_range.begin()) == it_range.end());
}

TEST_CASE("read repeated packed enum field: many") {
    const std::string buffer = load_data("repeated_packed_enum/data-many");

    protozero::pbf_reader item{buffer};

    REQUIRE(item.next());
    const auto it_range = item.get_packed_enum();
    REQUIRE_FALSE(item.next());

    auto it = it_range.begin();
    REQUIRE(it != it_range.end());
    REQUIRE(*it++ == 0 /* BLACK */);
    REQUIRE(*it++ == 3 /* BLUE */);
    REQUIRE(*it++ == 2 /* GREEN */);
    REQUIRE(it == it_range.end());
}

TEST_CASE("read repeated packed enum field: end of buffer") {
    const std::string buffer = load_data("repeated_packed_enum/data-many");

    for (std::string::size_type i = 1; i < buffer.size(); ++i) {
        protozero::pbf_reader item{buffer.data(), i};
        REQUIRE(item.next());
        REQUIRE_THROWS_AS(item.get_packed_enum(), const protozero::end_of_buffer_exception&);
    }
}

TEST_CASE("write repeated packed enum field") {
    std::string buffer;
    protozero::pbf_writer pw{buffer};

    SECTION("empty") {
        const int32_t data[] = { 0 /* BLACK */ };
        pw.add_packed_enum(1, std::begin(data), std::begin(data) /* !!!! */);

        REQUIRE(buffer == load_data("repeated_packed_enum/data-empty"));
    }

    SECTION("one") {
        const int32_t data[] = { 0 /* BLACK */ };
        pw.add_packed_enum(1, std::begin(data), std::end(data));

        REQUIRE(buffer == load_data("repeated_packed_enum/data-one"));
    }

    SECTION("many") {
        const int32_t data[] = { 0 /* BLACK */, 3 /* BLUE */, 2 /* GREEN */ };
        pw.add_packed_enum(1, std::begin(data), std::end(data));

        REQUIRE(buffer == load_data("repeated_packed_enum/data-many"));
    }
}