[tests] Add unit tests for query features fiters

test/api/query.test.cpp

@@ -0,0 +1,62 @@
+#include <mbgl/map/map.hpp>
+#include <mbgl/platform/default/headless_display.hpp>
+#include <mbgl/platform/default/headless_view.hpp>
+#include <mbgl/sprite/sprite_image.hpp>
+#include <mbgl/test/stub_file_source.hpp>
+#include <mbgl/test/util.hpp>
+#include <mbgl/util/image.hpp>
+#include <mbgl/util/io.hpp>
+#include <mbgl/util/run_loop.hpp>
+
+using namespace mbgl;
+
+namespace {
+
+class QueryTest {
+public:
+    QueryTest() {
+        auto decoded = decodeImage(util::read_file("test/fixtures/sprites/default_marker.png"));
+        auto image = std::make_unique<SpriteImage>(std::move(decoded), 1.0);
+
+        map.setStyleJSON(util::read_file("test/fixtures/api/query_style.json"));
+        map.addImage("test-icon", std::move(image));
+
+        test::render(map);
+    }
+
+    util::RunLoop loop;
+    std::shared_ptr<HeadlessDisplay> display { std::make_shared<HeadlessDisplay>() };
+    HeadlessView view { display, 1 };
+    StubFileSource fileSource;
+    Map map { view, fileSource, MapMode::Still };
+};
+
+} // end namespace
+
+TEST(Query, QueryRenderedFeatures) {
+    QueryTest test;
+
+    auto features1 = test.map.queryRenderedFeatures(test.map.pixelForLatLng({ 0, 0 }));
+    EXPECT_EQ(features1.size(), 3u);
+
+    auto features2 = test.map.queryRenderedFeatures(test.map.pixelForLatLng({ 9, 9 }));
+    EXPECT_EQ(features2.size(), 0u);
+}
+
+TEST(Query, QueryRenderedFeaturesFilterLayer) {
+    QueryTest test;
+
+    auto zz = test.map.pixelForLatLng({ 0, 0 });
+
+    auto features1 = test.map.queryRenderedFeatures(zz, {{ "layer1"}});
+    EXPECT_EQ(features1.size(), 1u);
+
+    auto features2 = test.map.queryRenderedFeatures(zz, {{ "layer1", "layer2" }});
+    EXPECT_EQ(features2.size(), 2u);
+
+    auto features3 = test.map.queryRenderedFeatures(zz, {{ "foobar" }});
+    EXPECT_EQ(features3.size(), 0u);
+
+    auto features4 = test.map.queryRenderedFeatures(zz, {{ "foobar", "layer3" }});
+    EXPECT_EQ(features4.size(), 1u);
+}