ignore Transform changes with NaN parameters

test/miscellaneous/transform.cpp

@@ -0,0 +1,125 @@
+#include "../fixtures/util.hpp"
+
+#include <mbgl/util/run_loop.hpp>
+#include <mbgl/map/map_data.hpp>
+#include <mbgl/map/map_context.hpp>
+#include <mbgl/platform/default/headless_view.hpp>
+#include <mbgl/platform/default/headless_display.hpp>
+#include <mbgl/storage/default_file_source.hpp>
+
+#include <cstdlib>
+
+using namespace mbgl;
+
+class MockView : public View {
+public:
+    void activate() override {
+    }
+    void deactivate() override {
+    }
+    void notify() override {
+    }
+    void invalidate(std::function<void()>) override {
+    }
+};
+
+TEST(Transform, InvalidScale) {
+    MockView view;
+    Transform transform(view);
+
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(1, transform.getScale());
+
+    transform.setScale(2);
+
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(2, transform.getScale());
+
+    const double invalid = std::nan("");
+    transform.setScale(invalid);
+
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(2, transform.getScale());
+
+    transform.scaleBy(invalid);
+
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(2, transform.getScale());
+
+    transform.setZoom(invalid);
+
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(2, transform.getScale());
+
+    transform.setLatLngZoom({ 0, 0 }, invalid);
+
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(2, transform.getScale());
+}
+
+TEST(Transform, InvalidLatLng) {
+    MockView view;
+    Transform transform(view);
+
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(1, transform.getScale());
+
+    transform.setScale(2);
+    transform.setLatLng({ 8, 10 });
+
+    ASSERT_DOUBLE_EQ(8, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(10, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(2, transform.getScale());
+
+    transform.setLatLngZoom({ 10, 8 }, 2);
+
+    ASSERT_DOUBLE_EQ(10, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(8, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(4, transform.getScale());
+
+    const double invalid = std::nan("");
+    transform.setLatLngZoom({ invalid, 8 }, 2);
+
+    ASSERT_DOUBLE_EQ(10, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(8, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(4, transform.getScale());
+
+    transform.setLatLngZoom({ 10, invalid }, 2);
+
+    ASSERT_DOUBLE_EQ(10, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(8, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(4, transform.getScale());
+}
+
+
+TEST(Transform, InvalidBearing) {
+    MockView view;
+    Transform transform(view);
+
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(1, transform.getScale());
+
+    transform.setScale(2);
+    transform.setAngle(2);
+
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(2, transform.getScale());
+    ASSERT_DOUBLE_EQ(2, transform.getAngle());
+
+    const double invalid = std::nan("");
+    transform.setAngle(invalid);
+
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().latitude);
+    ASSERT_DOUBLE_EQ(0, transform.getLatLng().longitude);
+    ASSERT_DOUBLE_EQ(2, transform.getScale());
+    ASSERT_DOUBLE_EQ(2, transform.getAngle());
+}