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#include <test.hpp>
#include <string>
#include <vector>
namespace {
// Input data.vector is encoded according to
// https://github.com/mapbox/mapnik-vector-tile/blob/master/proto/vector_tile.proto
std::string get_name(protozero::pbf_reader layer) { // copy!
while (layer.next(1)) { // required string name
return layer.get_string();
}
REQUIRE(false); // should never be here
return "";
}
} // anonymous namespace
TEST_CASE("reading vector tiles") {
static const std::vector<std::string> expected_layer_names = {
"landuse", "waterway", "water", "aeroway", "barrier_line", "building",
"landuse_overlay", "tunnel", "road", "bridge", "admin",
"country_label_line", "country_label", "marine_label", "state_label",
"place_label", "water_label", "area_label", "rail_station_label",
"airport_label", "road_label", "waterway_label", "building_label"
};
const std::string buffer = load_data("vector_tile/data.vector");
protozero::pbf_reader item{buffer};
std::vector<std::string> layer_names;
SECTION("iterate over message using next()") {
while (item.next()) {
if (item.tag() == 3) { // repeated message Layer
protozero::pbf_reader layer{item.get_message()};
while (layer.next()) {
switch (layer.tag()) {
case 1: // required string name
layer_names.push_back(layer.get_string());
break;
default:
layer.skip();
}
}
} else {
item.skip();
REQUIRE(false); // should never be here
}
}
REQUIRE(layer_names == expected_layer_names);
}
SECTION("iterate over message using next(tag)") {
while (item.next(3)) { // repeated message Layer
protozero::pbf_reader layermsg{item.get_message()};
while (layermsg.next(1)) { // required string name
layer_names.push_back(layermsg.get_string());
}
}
REQUIRE(layer_names == expected_layer_names);
}
SECTION("iterate over message using next(tag, type)") {
while (item.next(3, protozero::pbf_wire_type::length_delimited)) { // repeated message Layer
protozero::pbf_reader layermsg{item.get_message()};
while (layermsg.next(1, protozero::pbf_wire_type::length_delimited)) { // required string name
layer_names.push_back(layermsg.get_string());
}
}
REQUIRE(layer_names == expected_layer_names);
}
SECTION("iterate over features in road layer") {
int n=0;
int n_id = 0;
int n_geomtype = 0;
while (item.next(3)) { // repeated message Layer
protozero::pbf_reader layer{item.get_message()};
const std::string name = get_name(layer);
if (name == "road") {
while (layer.next(2)) { // repeated Feature
++n;
protozero::pbf_reader feature{layer.get_message()};
while (feature.next()) {
switch (feature.tag()) {
case 1: { // optional uint64 id
const auto id = feature.get_uint64();
REQUIRE(id >= 1ULL);
REQUIRE(id <= 504ULL);
++n_id;
break;
}
case 3: { // optional GeomType
const auto geom_type = feature.get_uint32();
REQUIRE(geom_type >= 1UL);
REQUIRE(geom_type <= 3UL);
++n_geomtype;
break;
}
default:
feature.skip();
}
}
}
}
}
REQUIRE(n == 502);
REQUIRE(n_id == 502);
REQUIRE(n_geomtype == 502);
}
SECTION("iterate over features in road layer using tag_and_type") {
int n=0;
int n_id = 0;
int n_geomtype = 0;
while (item.next(3)) { // repeated message Layer
protozero::pbf_reader layer{item.get_message()};
const std::string name = get_name(layer);
if (name == "road") {
while (layer.next(2)) { // repeated Feature
++n;
protozero::pbf_reader feature{layer.get_message()};
while (feature.next()) {
switch (feature.tag_and_type()) {
case protozero::tag_and_type(1, protozero::pbf_wire_type::varint): { // optional uint64 id
const auto id = feature.get_uint64();
REQUIRE(id >= 1ULL);
REQUIRE(id <= 504ULL);
++n_id;
break;
}
case protozero::tag_and_type(3, protozero::pbf_wire_type::varint): { // optional GeomType
const auto geom_type = feature.get_uint32();
REQUIRE(geom_type >= 1UL);
REQUIRE(geom_type <= 3UL);
++n_geomtype;
break;
}
default:
feature.skip();
}
}
}
}
}
REQUIRE(n == 502);
REQUIRE(n_id == 502);
REQUIRE(n_geomtype == 502);
}
}
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