MapLibreParticleLab/test/style/conversion/layer.test.cpp

#include <mbgl/test/util.hpp>

#include <mbgl/style/conversion/filter.hpp>
#include <mbgl/style/conversion/json.hpp>
#include <mbgl/style/conversion/layer.hpp>
#include <mbgl/style/layers/background_layer_impl.hpp>

#include <rapidjson/prettywriter.h>

using namespace mln;
using namespace mln::style;
using namespace mln::style::conversion;
using namespace std::literals::chrono_literals;

std::unique_ptr<Layer> parseLayer(const std::string& src) {
    Error error;
    auto layer = convertJSON<std::unique_ptr<Layer>>(src, error);
    if (layer) return std::move(*layer);
    return nullptr;
}

Filter parseFilter(const std::string& expression) {
    Error error;
    return *convertJSON<Filter>(expression, error);
}

std::string stringifyLayer(const Value& value) {
    rapidjson::StringBuffer s;
    rapidjson::PrettyWriter<rapidjson::StringBuffer> writer(s);
    writer.SetIndent(' ', 2u);
    stringify(writer, value);
    return s.GetString();
}

TEST(StyleConversion, LayerTransition) {
    auto layer = parseLayer(R"JSON({
        "type": "background",
        "id": "background",
        "paint": {
            "background-color-transition": {
                "duration": 400,
                "delay": 500
            }
        }
    })JSON");
    ASSERT_STREQ("background", layer->getTypeInfo()->type);
    ASSERT_EQ(400ms, *static_cast<BackgroundLayer*>(layer.get())->impl().paint.get<BackgroundColor>().options.duration);
    ASSERT_EQ(500ms, *static_cast<BackgroundLayer*>(layer.get())->impl().paint.get<BackgroundColor>().options.delay);
}

TEST(StyleConversion, SerializeDefaults) {
    auto layer = parseLayer(R"JSON({
        "type": "background",
        "id": "background"
    })JSON");

    EXPECT_NE(nullptr, layer);
    auto value = layer->serialize();
    EXPECT_NE(nullptr, value.getObject());
    EXPECT_EQ(2u, value.getObject()->size());
}

TEST(StyleConversion, RoundtripWithTransitions) {
    auto layer = parseLayer(R"JSON({
        "type": "background",
        "id": "background",
        "paint": {
            "background-color-transition": {
                "duration": 400,
                "delay": 500
            }
        }
    })JSON");

    EXPECT_NE(nullptr, layer);
    auto value = layer->serialize();
    EXPECT_NE(nullptr, value.getObject());
    EXPECT_EQ(3u, value.getObject()->size());

    auto roundTripped = parseLayer(stringifyLayer(value));
    EXPECT_NE(nullptr, roundTripped);
    auto roundTrippedValue = roundTripped->serialize();
    EXPECT_NE(nullptr, roundTrippedValue.getObject());
    EXPECT_EQ(3u, roundTrippedValue.getObject()->size());
}

TEST(StyleConversion, OverrideDefaults) {
    auto layer = parseLayer(R"JSON({
        "type": "symbol",
        "id": "symbol",
        "source": "composite",
        "source-layer": "landmarks",
        "filter": ["has", "monuments"],
        "minzoom": 12,
        "maxzoom": 18,
        "layout": {
            "visibility": "none",
            "text-field": ["format",
                            "Hello",
                            ["image", ["get", "world"]],
                            "Example", {"text-color": "rgba(128, 255, 39, 1)"}
                          ],
            "icon-image": ["image", ["get", "landmark_image"]],
            "text-size": 24
        },
        "paint": {
            "text-color": "turquoise",
            "text-color-transition": {
                "duration": 300,
                "delay": 100
            }
        }
    })JSON");

    EXPECT_NE(nullptr, layer);
    auto value = layer->serialize();
    EXPECT_NE(nullptr, value.getObject());
    const auto& object = *(value.getObject());
    EXPECT_EQ(9u, object.size());
    EXPECT_EQ(4u, object.at("layout").getObject()->size());
    EXPECT_EQ(2u, object.at("paint").getObject()->size());

    auto roundTripped = parseLayer(stringifyLayer(value));
    EXPECT_NE(nullptr, roundTripped);
    auto roundTrippedValue = roundTripped->serialize();
    const auto& roundTrippedObject = *(roundTrippedValue.getObject());
    EXPECT_NE(nullptr, roundTrippedValue.getObject());
    EXPECT_EQ(9u, roundTrippedObject.size());
    EXPECT_EQ(4u, roundTrippedObject.at("layout").getObject()->size());
    EXPECT_EQ(2u, roundTrippedObject.at("paint").getObject()->size());
}

TEST(StyleConversion, SetGenericProperties) {
    auto layer = parseLayer(R"JSON({
        "type": "symbol",
        "id": "symbol",
        "source": "composite",
        "source-layer": "landmarks",
        "filter": ["has", "monuments"],
        "minzoom": 12,
        "maxzoom": 18
    })JSON");

    ASSERT_NE(nullptr, layer);
    EXPECT_EQ(parseFilter(R"FILTER(["has", "monuments"])FILTER").serialize(), layer->getFilter().serialize());
    EXPECT_EQ(12.0f, layer->getMinZoom());
    EXPECT_EQ(18.0f, layer->getMaxZoom());
    EXPECT_EQ("landmarks", layer->getSourceLayer());

    const JSValue newComposite("composite_2");
    layer->setProperty("source", Convertible(&newComposite));
    EXPECT_EQ("composite_2", layer->getSourceID());

    const JSValue newSourceLayer("poi");
    layer->setProperty("source-layer", Convertible(&newSourceLayer));
    EXPECT_EQ("poi", layer->getSourceLayer());

    const JSValue newMinZoom(1.0f);
    layer->setProperty("minzoom", Convertible(&newMinZoom));
    EXPECT_EQ(1.0f, layer->getMinZoom());

    const JSValue newMaxZoom(22.0f);
    layer->setProperty("maxzoom", Convertible(&newMaxZoom));
    EXPECT_EQ(22.0f, layer->getMaxZoom());
}