osrm-backend/third_party/vtzero/test/fixture_tests.cpp

#include <test.hpp>

#include <vtzero/builder.hpp>
#include <vtzero/geometry.hpp>
#include <vtzero/vector_tile.hpp>

#include <cstdint>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <stdexcept>
#include <string>

static std::string open_tile(const std::string& path) {
    const auto* fixtures_dir = std::getenv("FIXTURES_DIR");
    if (fixtures_dir == nullptr) {
        std::cerr << "Set FIXTURES_DIR environment variable to the directory where the mvt fixtures are!\n";
        std::exit(2);
    }

    std::ifstream stream{std::string{fixtures_dir} + "/" + path,
                         std::ios_base::in|std::ios_base::binary};
    if (!stream.is_open()) {
        throw std::runtime_error{"could not open: '" + path + "'"};
    }

    std::string message{std::istreambuf_iterator<char>(stream.rdbuf()),
                        std::istreambuf_iterator<char>()};

    stream.close();
    return message;
}

// ---------------------------------------------------------------------------

struct point_handler {

    std::vector<vtzero::point> data{};

    void points_begin(uint32_t count) {
        data.reserve(count);
    }

    void points_point(const vtzero::point point) {
        data.push_back(point);
    }

    void points_end() const noexcept {
    }

}; // struct point_handler

struct linestring_handler {

    std::vector<std::vector<vtzero::point>> data{};

    void linestring_begin(uint32_t count) {
        data.emplace_back();
        data.back().reserve(count);
    }

    void linestring_point(const vtzero::point point) {
        data.back().push_back(point);
    }

    void linestring_end() const noexcept {
    }

}; // struct linestring_handler

struct polygon_handler {

    std::vector<std::vector<vtzero::point>> data{};

    void ring_begin(uint32_t count) {
        data.emplace_back();
        data.back().reserve(count);
    }

    void ring_point(const vtzero::point point) {
        data.back().push_back(point);
    }

    void ring_end(vtzero::ring_type /*dummy*/) const noexcept {
    }

}; // struct polygon_handler

// ---------------------------------------------------------------------------

struct geom_handler {

    std::vector<vtzero::point> point_data{};
    std::vector<std::vector<vtzero::point>> line_data{};

    void points_begin(uint32_t count) {
        point_data.reserve(count);
    }

    void points_point(const vtzero::point point) {
        point_data.push_back(point);
    }

    void points_end() const noexcept {
    }

    void linestring_begin(uint32_t count) {
        line_data.emplace_back();
        line_data.back().reserve(count);
    }

    void linestring_point(const vtzero::point point) {
        line_data.back().push_back(point);
    }

    void linestring_end() const noexcept {
    }

    void ring_begin(uint32_t count) {
        line_data.emplace_back();
        line_data.back().reserve(count);
    }

    void ring_point(const vtzero::point point) {
        line_data.back().push_back(point);
    }

    void ring_end(vtzero::ring_type /*dummy*/) const noexcept {
    }

}; // struct geom_handler

// ---------------------------------------------------------------------------

static vtzero::feature check_layer(vtzero::vector_tile& tile) {
    REQUIRE_FALSE(tile.empty());
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.name() == "hello");
    REQUIRE(layer.version() == 2);
    REQUIRE(layer.extent() == 4096);
    REQUIRE(layer.num_features() == 1);

    return layer.next_feature();
}

// ---------------------------------------------------------------------------

TEST_CASE("MVT test 001: Empty tile") {
    std::string buffer{open_tile("001/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.empty());
    REQUIRE(tile.count_layers() == 0); // NOLINT(readability-container-size-empty)
}

TEST_CASE("MVT test 002: Tile with single point feature without id") {
    std::string buffer{open_tile("002/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    const auto feature = check_layer(tile);

    REQUIRE_FALSE(feature.has_id());
    REQUIRE(feature.id() == 0);
    REQUIRE(feature.geometry_type() == vtzero::GeomType::POINT);

    point_handler handler;
    vtzero::decode_point_geometry(feature.geometry(), handler);

    std::vector<vtzero::point> expected = {{25, 17}};
    REQUIRE(handler.data == expected);
}

TEST_CASE("MVT test 003: Tile with single point with missing geometry type") {
    std::string buffer{open_tile("003/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    const auto feature = check_layer(tile);
    REQUIRE(feature.has_id());
    REQUIRE(feature.id() == 1);
    REQUIRE(feature.geometry_type() == vtzero::GeomType::UNKNOWN);
}

TEST_CASE("MVT test 004: Tile with single point with missing geometry") {
    std::string buffer{open_tile("004/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE_THROWS_AS(check_layer(tile), vtzero::format_exception);
}

TEST_CASE("MVT test 005: Tile with single point with broken tags array") {
    std::string buffer{open_tile("005/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE_FALSE(tile.empty());
    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE_FALSE(layer.empty());

    REQUIRE_THROWS_AS(layer.next_feature(), vtzero::format_exception);
}

TEST_CASE("MVT test 006: Tile with single point with invalid GeomType") {
    std::string buffer{open_tile("006/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE_FALSE(layer.empty());

    REQUIRE_THROWS_AS(layer.next_feature(), vtzero::format_exception);
}

TEST_CASE("MVT test 007: Layer version as string instead of as an int") {
    std::string buffer{open_tile("007/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    REQUIRE_THROWS_AS(tile.get_layer(0), vtzero::format_exception);
}

TEST_CASE("MVT test 008: Tile layer extent encoded as string") {
    std::string buffer{open_tile("008/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    REQUIRE_THROWS_AS(tile.next_layer(), vtzero::format_exception);
}

TEST_CASE("MVT test 009: Tile layer extent missing") {
    std::string buffer{open_tile("009/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();

    REQUIRE(layer.name() == "hello");
    REQUIRE(layer.version() == 2);
    REQUIRE(layer.extent() == 4096);
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature.id() == 1);
}

TEST_CASE("MVT test 010: Tile layer value is encoded as int, but pretends to be string") {
    std::string buffer{open_tile("010/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE_FALSE(layer.empty());

    const auto pv = layer.value(0);
    REQUIRE_THROWS_AS(pv.type(), vtzero::format_exception);
}

TEST_CASE("MVT test 011: Tile layer value is encoded as unknown type") {
    std::string buffer{open_tile("011/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    const auto layer = tile.next_layer();
    REQUIRE_FALSE(layer.empty());

    const auto pv = layer.value(0);
    REQUIRE_THROWS_AS(pv.type(), vtzero::format_exception);
}

TEST_CASE("MVT test 012: Unknown layer version") {
    std::string buffer{open_tile("012/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    REQUIRE_THROWS_AS(tile.next_layer(), vtzero::version_exception);
}

TEST_CASE("MVT test 013: Tile with key in table encoded as int") {
    std::string buffer{open_tile("013/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    REQUIRE_THROWS_AS(tile.next_layer(), vtzero::format_exception);
}

TEST_CASE("MVT test 014: Tile layer without a name") {
    std::string buffer{open_tile("014/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    REQUIRE_THROWS_AS(tile.next_layer(), vtzero::format_exception);
}

TEST_CASE("MVT test 015: Two layers with the same name") {
    std::string buffer{open_tile("015/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 2);

    while (const auto layer = tile.next_layer()) {
        REQUIRE(layer.name() == "hello");
    }

    const auto layer = tile.get_layer_by_name("hello");
    REQUIRE(layer.name() == "hello");
}

TEST_CASE("MVT test 016: Valid unknown geometry") {
    std::string buffer{open_tile("016/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    const auto feature = check_layer(tile);
    REQUIRE(feature.geometry_type() == vtzero::GeomType::UNKNOWN);
}

TEST_CASE("MVT test 017: Valid point geometry") {
    std::string buffer{open_tile("017/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    const auto feature = check_layer(tile);

    REQUIRE(feature.has_id());
    REQUIRE(feature.id() == 1);

    REQUIRE(feature.geometry_type() == vtzero::GeomType::POINT);

    const std::vector<vtzero::point> expected = {{25, 17}};

    SECTION("decode_point_geometry") {
        point_handler handler;
        vtzero::decode_point_geometry(feature.geometry(), handler);
        REQUIRE(handler.data == expected);
    }

    SECTION("decode_geometry") {
        geom_handler handler;
        vtzero::decode_geometry(feature.geometry(), handler);
        REQUIRE(handler.point_data == expected);
    }
}

TEST_CASE("MVT test 018: Valid linestring geometry") {
    std::string buffer = open_tile("018/tile.mvt");
    vtzero::vector_tile tile{buffer};

    const auto feature = check_layer(tile);

    REQUIRE(feature.geometry_type() == vtzero::GeomType::LINESTRING);

    const std::vector<std::vector<vtzero::point>> expected = {{{2, 2}, {2,10}, {10, 10}}};

    SECTION("decode_linestring_geometry") {
        linestring_handler handler;
        vtzero::decode_linestring_geometry(feature.geometry(), handler);
        REQUIRE(handler.data == expected);
    }

    SECTION("decode_geometry") {
        geom_handler handler;
        vtzero::decode_geometry(feature.geometry(), handler);
        REQUIRE(handler.line_data == expected);
    }
}

TEST_CASE("MVT test 019: Valid polygon geometry") {
    std::string buffer = open_tile("019/tile.mvt");
    vtzero::vector_tile tile{buffer};

    const auto feature = check_layer(tile);

    REQUIRE(feature.geometry_type() == vtzero::GeomType::POLYGON);

    const std::vector<std::vector<vtzero::point>> expected = {{{3, 6}, {8,12}, {20, 34}, {3, 6}}};

    SECTION("deocode_polygon_geometry") {
        polygon_handler handler;
        vtzero::decode_polygon_geometry(feature.geometry(), handler);
        REQUIRE(handler.data == expected);
    }

    SECTION("deocode_geometry") {
        geom_handler handler;
        vtzero::decode_geometry(feature.geometry(), handler);
        REQUIRE(handler.line_data == expected);
    }
}

TEST_CASE("MVT test 020: Valid multipoint geometry") {
    std::string buffer = open_tile("020/tile.mvt");
    vtzero::vector_tile tile{buffer};

    const auto feature = check_layer(tile);

    REQUIRE(feature.geometry_type() == vtzero::GeomType::POINT);

    point_handler handler;
    vtzero::decode_point_geometry(feature.geometry(), handler);

    const std::vector<vtzero::point> expected = {{5, 7}, {3,2}};

    REQUIRE(handler.data == expected);
}

TEST_CASE("MVT test 021: Valid multilinestring geometry") {
    std::string buffer = open_tile("021/tile.mvt");
    vtzero::vector_tile tile{buffer};

    const auto feature = check_layer(tile);

    REQUIRE(feature.geometry_type() == vtzero::GeomType::LINESTRING);

    linestring_handler handler;
    vtzero::decode_linestring_geometry(feature.geometry(), handler);

    const std::vector<std::vector<vtzero::point>> expected = {{{2, 2}, {2,10}, {10, 10}}, {{1,1}, {3, 5}}};

    REQUIRE(handler.data == expected);
}

TEST_CASE("MVT test 022: Valid multipolygon geometry") {
    std::string buffer = open_tile("022/tile.mvt");
    vtzero::vector_tile tile{buffer};

    const auto feature = check_layer(tile);

    REQUIRE(feature.geometry_type() == vtzero::GeomType::POLYGON);

    polygon_handler handler;
    vtzero::decode_polygon_geometry(feature.geometry(), handler);

    const std::vector<std::vector<vtzero::point>> expected = {
        {{0, 0}, {10, 0}, {10, 10}, {0,10}, {0, 0}},
        {{11, 11}, {20, 11}, {20, 20}, {11, 20}, {11, 11}},
        {{13, 13}, {13, 17}, {17, 17}, {17, 13}, {13, 13}}
    };

    REQUIRE(handler.data == expected);
}

TEST_CASE("MVT test 023: Invalid layer: missing layer name") {
    std::string buffer = open_tile("023/tile.mvt");
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    REQUIRE_THROWS_AS(tile.next_layer(), vtzero::format_exception);
    REQUIRE_THROWS_AS(tile.get_layer_by_name("foo"), vtzero::format_exception);
}

TEST_CASE("MVT test 024: Missing layer version") {
    std::string buffer = open_tile("024/tile.mvt");
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    const auto layer = tile.next_layer();
    REQUIRE(layer.version() == 1);
}

TEST_CASE("MVT test 025: Layer without features") {
    std::string buffer = open_tile("025/tile.mvt");
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    const auto layer = tile.next_layer();
    REQUIRE(layer.empty());
    REQUIRE(layer.num_features() == 0); // NOLINT(readability-container-size-empty)
}

TEST_CASE("MVT test 026: Extra value type") {
    std::string buffer = open_tile("026/tile.mvt");
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    const auto feature = layer.next_feature();
    REQUIRE(feature.empty());

    const auto& table = layer.value_table();
    REQUIRE(table.size() == 1);

    const auto pvv = table[0];
    REQUIRE(pvv.valid());
    REQUIRE_THROWS_AS(pvv.type(), vtzero::format_exception);
}

TEST_CASE("MVT test 027: Layer with unused bool property value") {
    std::string buffer{open_tile("027/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    const auto feature = layer.next_feature();
    REQUIRE(feature.num_properties() == 0); // NOLINT(readability-container-size-empty)

    const auto& vtab = layer.value_table();
    REQUIRE(vtab.size() == 1);
    REQUIRE(vtab[0].bool_value());
}

TEST_CASE("MVT test 030: Two geometry fields") {
    std::string buffer = open_tile("030/tile.mvt");
    vtzero::vector_tile tile{buffer};

    auto layer = tile.next_layer();
    REQUIRE_FALSE(layer.empty());

    REQUIRE_THROWS_AS(layer.next_feature(), vtzero::format_exception);
}

TEST_CASE("MVT test 032: Layer with single feature with string property value") {
    std::string buffer{open_tile("032/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE_FALSE(tile.empty());
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature.num_properties() == 1);

    auto prop = feature.next_property();
    REQUIRE(prop.key() == "key1");
    REQUIRE(prop.value().string_value() == "i am a string value");

    feature.reset_property();
    auto ii = feature.next_property_indexes();
    REQUIRE(ii);
    REQUIRE(ii.key().value() == 0);
    REQUIRE(ii.value().value() == 0);
    REQUIRE_FALSE(feature.next_property_indexes());

    int32_t sum = 0;
    int32_t count = 0;
    feature.for_each_property_indexes([&](vtzero::index_value_pair&& ivp) {
        sum += ivp.key().value();
        sum += ivp.value().value();
        ++count;
        return true;
    });

    REQUIRE(sum == 0);
    REQUIRE(count == 1);
}

TEST_CASE("MVT test 033: Layer with single feature with float property value") {
    std::string buffer{open_tile("033/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature.num_properties() == 1);

    const auto prop = feature.next_property();
    REQUIRE(prop.key() == "key1");
    REQUIRE(prop.value().float_value() == Approx(3.1));
}

TEST_CASE("MVT test 034: Layer with single feature with double property value") {
    std::string buffer{open_tile("034/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature.num_properties() == 1);

    const auto prop = feature.next_property();
    REQUIRE(prop.key() == "key1");
    REQUIRE(prop.value().double_value() == Approx(1.23));
}

TEST_CASE("MVT test 035: Layer with single feature with int property value") {
    std::string buffer{open_tile("035/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature.num_properties() == 1);

    const auto prop = feature.next_property();
    REQUIRE(prop.key() == "key1");
    REQUIRE(prop.value().int_value() == 6);
}

TEST_CASE("MVT test 036: Layer with single feature with uint property value") {
    std::string buffer{open_tile("036/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature.num_properties() == 1);

    const auto prop = feature.next_property();
    REQUIRE(prop.key() == "key1");
    REQUIRE(prop.value().uint_value() == 87948);
}

TEST_CASE("MVT test 037: Layer with single feature with sint property value") {
    std::string buffer{open_tile("037/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature.num_properties() == 1);

    const auto prop = feature.next_property();
    REQUIRE(prop.key() == "key1");
    REQUIRE(prop.value().sint_value() == 87948);
}

TEST_CASE("MVT test 038: Layer with all types of property value") {
    std::string buffer{open_tile("038/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();

    const auto& vtab = layer.value_table();
    REQUIRE(vtab.size() == 7);
    REQUIRE(vtab[0].string_value() == "ello");
    REQUIRE(vtab[1].bool_value());
    REQUIRE(vtab[2].int_value() == 6);
    REQUIRE(vtab[3].double_value() == Approx(1.23));
    REQUIRE(vtab[4].float_value() == Approx(3.1));
    REQUIRE(vtab[5].sint_value() == -87948);
    REQUIRE(vtab[6].uint_value() == 87948);

    REQUIRE_THROWS_AS(vtab[0].bool_value(), vtzero::type_exception);
    REQUIRE_THROWS_AS(vtab[0].int_value(), vtzero::type_exception);
    REQUIRE_THROWS_AS(vtab[0].double_value(), vtzero::type_exception);
    REQUIRE_THROWS_AS(vtab[0].float_value(), vtzero::type_exception);
    REQUIRE_THROWS_AS(vtab[0].sint_value(), vtzero::type_exception);
    REQUIRE_THROWS_AS(vtab[0].uint_value(), vtzero::type_exception);
    REQUIRE_THROWS_AS(vtab[1].string_value(), vtzero::type_exception);
}

TEST_CASE("MVT test 039: Default values are actually encoded in the tile") {
    std::string buffer{open_tile("039/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.version() == 1);
    REQUIRE(layer.name() == "hello");
    REQUIRE(layer.extent() == 4096);
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature.id() == 0);
    REQUIRE(feature.geometry_type() == vtzero::GeomType::UNKNOWN);
    REQUIRE(feature.empty());

    REQUIRE_THROWS_AS(vtzero::decode_geometry(feature.geometry(), geom_handler{}), vtzero::geometry_exception);
}

TEST_CASE("MVT test 040: Feature has tags that point to non-existent Key in the layer.") {
    std::string buffer{open_tile("040/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);
    auto feature = layer.next_feature();
    REQUIRE(feature.num_properties() == 1);
    REQUIRE_THROWS_AS(feature.next_property(), vtzero::out_of_range_exception);
}

TEST_CASE("MVT test 040: Feature has tags that point to non-existent Key in the layer decoded using next_property_indexes().") {
    std::string buffer{open_tile("040/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);
    auto feature = layer.next_feature();
    REQUIRE(feature.num_properties() == 1);
    REQUIRE_THROWS_AS(feature.next_property_indexes(), vtzero::out_of_range_exception);
}

TEST_CASE("MVT test 041: Tags encoded as floats instead of as ints") {
    std::string buffer{open_tile("041/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);
    auto feature = layer.next_feature();
    REQUIRE_THROWS_AS(feature.next_property(), vtzero::out_of_range_exception);
}

TEST_CASE("MVT test 042: Feature has tags that point to non-existent Value in the layer.") {
    std::string buffer{open_tile("042/tile.mvt")};
    vtzero::vector_tile tile{buffer};

    REQUIRE(tile.count_layers() == 1);
    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);
    auto feature = layer.next_feature();
    REQUIRE(feature.num_properties() == 1);
    REQUIRE_THROWS_AS(feature.next_property(), vtzero::out_of_range_exception);
}

TEST_CASE("MVT test 043: A layer with six points that all share the same key but each has a unique value.") {
    std::string buffer{open_tile("043/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 6);

    auto feature = layer.next_feature();
    REQUIRE(feature);
    REQUIRE(feature.num_properties() == 1);

    auto property = feature.next_property();
    REQUIRE(property);
    REQUIRE(property.key() == "poi");
    REQUIRE(property.value().string_value() == "swing");

    feature = layer.next_feature();
    REQUIRE(feature);

    property = feature.next_property();
    REQUIRE(property);
    REQUIRE(property.key() == "poi");
    REQUIRE(property.value().string_value() == "water_fountain");
}

TEST_CASE("MVT test 044: Geometry field begins with a ClosePath command, which is invalid") {
    std::string buffer{open_tile("044/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();
    REQUIRE_THROWS_AS(vtzero::decode_geometry(geometry, geom_handler{}), vtzero::geometry_exception);
}

TEST_CASE("MVT test 045: Invalid point geometry that includes a MoveTo command and only half of the xy coordinates") {
    std::string buffer{open_tile("045/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();
    REQUIRE_THROWS_AS(vtzero::decode_geometry(geometry, geom_handler{}), vtzero::geometry_exception);
    REQUIRE_THROWS_WITH(vtzero::decode_geometry(geometry, geom_handler{}), "too few points in geometry");
}

TEST_CASE("MVT test 046: Invalid linestring geometry that includes two points in the same position, which is not OGC valid") {
    std::string buffer{open_tile("046/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();

    geom_handler handler;
    vtzero::decode_geometry(geometry, handler);

    const std::vector<std::vector<vtzero::point>> expected = {{{2, 2}, {2, 10}, {2, 10}}};
    REQUIRE(handler.line_data == expected);
}

TEST_CASE("MVT test 047: Invalid polygon with wrong ClosePath count 2 (must be count 1)") {
    std::string buffer{open_tile("047/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();
    REQUIRE_THROWS_AS(vtzero::decode_geometry(geometry, geom_handler{}), vtzero::geometry_exception);
    REQUIRE_THROWS_WITH(vtzero::decode_geometry(geometry, geom_handler{}), "ClosePath command count is not 1");
}

TEST_CASE("MVT test 048: Invalid polygon with wrong ClosePath count 0 (must be count 1)") {
    std::string buffer{open_tile("048/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();
    REQUIRE_THROWS_AS(vtzero::decode_geometry(geometry, geom_handler{}), vtzero::geometry_exception);
    REQUIRE_THROWS_WITH(vtzero::decode_geometry(geometry, geom_handler{}), "ClosePath command count is not 1");
}

TEST_CASE("MVT test 049: decoding linestring with int32 overflow in x coordinate") {
    std::string buffer{open_tile("049/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();

    geom_handler handler;
    vtzero::decode_geometry(geometry, handler);

    const std::vector<std::vector<vtzero::point>> expected = {{{std::numeric_limits<int32_t>::max(), 0}, {std::numeric_limits<int32_t>::min(), 1}}};
    REQUIRE(handler.line_data == expected);
}

TEST_CASE("MVT test 050: decoding linestring with int32 overflow in y coordinate") {
    std::string buffer{open_tile("050/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();

    geom_handler handler;
    vtzero::decode_geometry(geometry, handler);

    const std::vector<std::vector<vtzero::point>> expected = {{{0, std::numeric_limits<int32_t>::min()}, {-1, std::numeric_limits<int32_t>::max()}}};
    REQUIRE(handler.line_data == expected);
}

TEST_CASE("MVT test 051: multipoint with a huge count value, useful for ensuring no over-allocation errors. Example error message \"count too large\"") {
    std::string buffer{open_tile("051/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();
    REQUIRE_THROWS_AS(vtzero::decode_geometry(geometry, geom_handler{}), vtzero::geometry_exception);
    REQUIRE_THROWS_WITH(vtzero::decode_geometry(geometry, geom_handler{}), "count too large");
}

TEST_CASE("MVT test 052: multipoint with not enough points") {
    std::string buffer{open_tile("052/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();
    REQUIRE_THROWS_AS(vtzero::decode_geometry(geometry, geom_handler{}), vtzero::geometry_exception);
}

TEST_CASE("MVT test 053: clipped square (exact extent): a polygon that covers the entire tile to the exact boundary") {
    std::string buffer{open_tile("053/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();

    geom_handler handler;
    vtzero::decode_geometry(geometry, handler);

    const std::vector<std::vector<vtzero::point>> expected = {{{0, 0}, {4096, 0}, {4096, 4096}, {0, 4096}, {0, 0}}};
    REQUIRE(handler.line_data == expected);
}

TEST_CASE("MVT test 054: clipped square (one unit buffer): a polygon that covers the entire tile plus a one unit buffer") {
    std::string buffer{open_tile("054/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();

    geom_handler handler;
    vtzero::decode_geometry(geometry, handler);

    const std::vector<std::vector<vtzero::point>> expected = {{{-1, -1}, {4097, -1}, {4097, 4097}, {-1, 4097}, {-1, -1}}};
    REQUIRE(handler.line_data == expected);
}

TEST_CASE("MVT test 055: clipped square (minus one unit buffer): a polygon that almost covers the entire tile minus one unit buffer") {
    std::string buffer{open_tile("055/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();

    geom_handler handler;
    vtzero::decode_geometry(geometry, handler);

    const std::vector<std::vector<vtzero::point>> expected = {{{1, 1}, {4095, 1}, {4095, 4095}, {1, 4095}, {1, 1}}};
    REQUIRE(handler.line_data == expected);
}

TEST_CASE("MVT test 056: clipped square (large buffer): a polygon that covers the entire tile plus a 200 unit buffer") {
    std::string buffer{open_tile("056/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();

    geom_handler handler;
    vtzero::decode_geometry(geometry, handler);

    const std::vector<std::vector<vtzero::point>> expected = {{{-200, -200}, {4296, -200}, {4296, 4296}, {-200, 4296}, {-200, -200}}};
    REQUIRE(handler.line_data == expected);
}

TEST_CASE("MVT test 057: A point fixture with a gigantic MoveTo command. Can be used to test decoders for memory overallocation situations") {
    std::string buffer{open_tile("057/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();
    REQUIRE_THROWS_AS(vtzero::decode_geometry(geometry, geom_handler{}), vtzero::geometry_exception);
    REQUIRE_THROWS_WITH(vtzero::decode_geometry(geometry, geom_handler{}), "count too large");
}

TEST_CASE("MVT test 058: A linestring fixture with a gigantic LineTo command") {
    std::string buffer{open_tile("058/tile.mvt")};
    vtzero::vector_tile tile{buffer};
    REQUIRE(tile.count_layers() == 1);

    auto layer = tile.next_layer();
    REQUIRE(layer.num_features() == 1);

    auto feature = layer.next_feature();
    REQUIRE(feature);

    const auto geometry = feature.geometry();
    REQUIRE_THROWS_AS(vtzero::decode_geometry(geometry, geom_handler{}), vtzero::geometry_exception);
    REQUIRE_THROWS_WITH(vtzero::decode_geometry(geometry, geom_handler{}), "count too large");
}