1 files changed, 74 insertions, 0 deletions
diff --git a/test/api/repeated_render.test.cpp b/test/api/repeated_render.test.cpp
new file mode 100644
index 0000000000..cf71cb8416
--- /dev/null
+++ b/test/api/repeated_render.test.cpp
@@ -0,0 +1,74 @@
+#include <mbgl/test/util.hpp>
+#include <mbgl/test/fixture_log_observer.hpp>
+
+#include <mbgl/map/map.hpp>
+#include <mbgl/platform/default/headless_view.hpp>
+#include <mbgl/platform/default/headless_display.hpp>
+#include <mbgl/storage/default_file_source.hpp>
+#include <mbgl/util/image.hpp>
+#include <mbgl/util/io.hpp>
+#include <mbgl/util/run_loop.hpp>
+
+#include <future>
+
+TEST(API, RepeatedRender) {
+    using namespace mbgl;
+
+    util::RunLoop loop;
+
+    const auto style = util::read_file("test/fixtures/api/water.json");
+
+    auto display = std::make_shared<mbgl::HeadlessDisplay>();
+    HeadlessView view(display, 1, 256, 512);
+#ifdef MBGL_ASSET_ZIP
+    // Regenerate with `cd test/fixtures/api/ && zip -r assets.zip assets/`
+    DefaultFileSource fileSource(":memory:", "test/fixtures/api/assets.zip");
+#else
+    DefaultFileSource fileSource(":memory:", "test/fixtures/api/assets");
+#endif
+
+    Log::setObserver(std::make_unique<FixtureLogObserver>());
+
+    Map map(view, fileSource, MapMode::Still);
+
+    {
+        map.setStyleJSON(style);
+        PremultipliedImage result;
+        map.renderStill([&result](std::exception_ptr, PremultipliedImage&& image) {
+            result = std::move(image);
+        });
+
+        while (!result.size()) {
+            loop.runOnce();
+        }
+
+        ASSERT_EQ(256u, result.width);
+        ASSERT_EQ(512u, result.height);
+#if !TEST_READ_ONLY
+        util::write_file("test/fixtures/api/1.png", encodePNG(result));
+#endif
+    }
+
+    {
+        map.setStyleJSON(style);
+        PremultipliedImage result;
+        map.renderStill([&result](std::exception_ptr, PremultipliedImage&& image) {
+            result = std::move(image);
+        });
+
+        while (!result.size()) {
+            loop.runOnce();
+        }
+
+        ASSERT_EQ(256u, result.width);
+        ASSERT_EQ(512u, result.height);
+#if !TEST_READ_ONLY
+        util::write_file("test/fixtures/api/2.png", encodePNG(result));
+#endif
+    }
+
+    auto observer = Log::removeObserver();
+    auto flo = dynamic_cast<FixtureLogObserver*>(observer.get());
+    auto unchecked = flo->unchecked();
+    EXPECT_TRUE(unchecked.empty()) << unchecked;
+}