[test] Added API.ZoomHistory

3 files changed, 62 insertions, 0 deletions

diff --git a/test/api/repeated_render.test.cpp b/test/api/repeated_render.test.cpp
index 3da65939cc..dd9085efd7 100644
--- a/test/api/repeated_render.test.cpp
+++ b/test/api/repeated_render.test.cpp
@@ -11,6 +11,8 @@
 #include <mbgl/util/io.hpp>
 #include <mbgl/util/run_loop.hpp>
 #include <mbgl/style/style.hpp>
+#include <mbgl/style/layers/line_layer.hpp>
+#include <mbgl/style/sources/geojson_source.hpp>
 
 #include <future>
 
@@ -70,3 +72,63 @@ TEST(API, RepeatedRender) {
     auto unchecked = flo->unchecked();
     EXPECT_TRUE(unchecked.empty()) << unchecked;
 }
+
+TEST(API, ZoomHistory) {
+    util::RunLoop loop;
+
+    const auto style = util::read_file("test/fixtures/api/empty.json");
+
+    HeadlessBackend backend { test::sharedDisplay() };
+    BackendScope scope { backend };
+    OffscreenView view { backend.getContext(), { 512, 512 } };
+    DefaultFileSource fileSource(":memory:", ".");
+    ThreadPool threadPool(4);
+
+    Log::setObserver(std::make_unique<FixtureLogObserver>());
+
+    Map map(backend, view.getSize(), 1, fileSource, threadPool, MapMode::Still);
+    map.getStyle().loadJSON(style);
+
+    auto geojson = mapbox::geojson::parse(R"t({ "type": "FeatureCollection", "features": [{ "type": "Feature", "properties": {}, "geometry": { "type": "LineString", "coordinates": [ [ -150, -75 ], [  150,  75 ] ] } } ] })t");
+    auto source = std::make_unique<mbgl::style::GeoJSONSource>("testSource");
+    source->setGeoJSON(std::move(geojson));
+    map.getStyle().addSource(std::move(source));
+
+    auto layer = std::make_unique<mbgl::style::LineLayer>("testLayer", "testSource");
+    layer->setLineDasharray({ { 1.0f, 2.0f } });
+    layer->setLineWidth({ 16.0f });
+    map.getStyle().addLayer(std::move(layer));
+
+    {
+        PremultipliedImage result;
+        map.renderStill(view, [&](std::exception_ptr) {
+            result = view.readStillImage();
+        });
+
+        while (!result.valid()) {
+            loop.runOnce();
+        }
+
+        test::checkImage("test/fixtures/api/z0", result, 0.0002, 0.1);
+    }
+
+    {
+        map.setZoom(1.0);
+
+        PremultipliedImage result;
+        map.renderStill(view, [&](std::exception_ptr) {
+            result = view.readStillImage();
+        });
+
+        while (!result.valid()) {
+            loop.runOnce();
+        }
+
+        test::checkImage("test/fixtures/api/z1", result, 0.0002, 0.1);
+    }
+
+    auto observer = Log::removeObserver();
+    auto flo = dynamic_cast<FixtureLogObserver*>(observer.get());
+    auto unchecked = flo->unchecked();
+    EXPECT_TRUE(unchecked.empty()) << unchecked;
+}
diff --git a/test/fixtures/api/z0/expected.png b/test/fixtures/api/z0/expected.png
new file mode 100644
index 0000000000..0867a8cbf6
--- /dev/null
+++ b/test/fixtures/api/z0/expected.png
diff --git a/test/fixtures/api/z1/expected.png b/test/fixtures/api/z1/expected.png
new file mode 100644
index 0000000000..897dc196cc
--- /dev/null
+++ b/test/fixtures/api/z1/expected.png