1 files changed, 168 insertions, 0 deletions
diff --git a/test/util/geo.test.cpp b/test/util/geo.test.cpp
new file mode 100644
index 0000000000..95e75a0e1b
--- /dev/null
+++ b/test/util/geo.test.cpp
@@ -0,0 +1,168 @@
+#include <mbgl/test/util.hpp>
+
+#include <mbgl/util/constants.hpp>
+#include <mbgl/util/geo.hpp>
+#include <mbgl/tile/tile_id.hpp>
+
+using namespace mbgl;
+
+TEST(LatLngBounds, World) {
+    auto result = LatLngBounds::world();
+    ASSERT_DOUBLE_EQ(-90,  result.south());
+    ASSERT_DOUBLE_EQ( 90,  result.north());
+    ASSERT_DOUBLE_EQ(-180, result.west());
+    ASSERT_DOUBLE_EQ( 180, result.east());
+}
+
+TEST(LatLngBounds, Singleton) {
+    auto result = LatLngBounds::singleton({1, 2});
+    ASSERT_DOUBLE_EQ(1, result.south());
+    ASSERT_DOUBLE_EQ(1, result.north());
+    ASSERT_DOUBLE_EQ(2, result.west());
+    ASSERT_DOUBLE_EQ(2, result.east());
+}
+
+TEST(LatLngBounds, Hull) {
+    double s = 1, w = 2, n = 3, e = 4;
+
+    auto swne = LatLngBounds::hull({s, w}, {n, e});
+    ASSERT_DOUBLE_EQ(s, swne.south());
+    ASSERT_DOUBLE_EQ(n, swne.north());
+    ASSERT_DOUBLE_EQ(w, swne.west());
+    ASSERT_DOUBLE_EQ(e, swne.east());
+
+    auto nesw = LatLngBounds::hull({n, e}, {s, w});
+    ASSERT_DOUBLE_EQ(s, nesw.south());
+    ASSERT_DOUBLE_EQ(n, nesw.north());
+    ASSERT_DOUBLE_EQ(w, nesw.west());
+    ASSERT_DOUBLE_EQ(e, nesw.east());
+
+    auto senw = LatLngBounds::hull({s, e}, {n, w});
+    ASSERT_DOUBLE_EQ(s, senw.south());
+    ASSERT_DOUBLE_EQ(n, senw.north());
+    ASSERT_DOUBLE_EQ(w, senw.west());
+    ASSERT_DOUBLE_EQ(e, senw.east());
+
+    auto nwse = LatLngBounds::hull({n, w}, {s, e});
+    ASSERT_DOUBLE_EQ(s, nwse.south());
+    ASSERT_DOUBLE_EQ(n, nwse.north());
+    ASSERT_DOUBLE_EQ(w, nwse.west());
+    ASSERT_DOUBLE_EQ(e, nwse.east());
+}
+
+TEST(LatLngBounds, Empty) {
+    ASSERT_TRUE(LatLngBounds::empty().isEmpty());
+    ASSERT_FALSE(LatLngBounds::world().isEmpty());
+}
+
+TEST(LatLngBounds, Center) {
+    auto result = LatLngBounds::hull({1, 2}, {3, 4}).center();
+    ASSERT_DOUBLE_EQ(2, result.latitude);
+    ASSERT_DOUBLE_EQ(3, result.longitude);
+}
+
+TEST(LatLngBounds, Southwest) {
+    auto result = LatLngBounds::hull({1, 2}, {3, 4}).southwest();
+    ASSERT_DOUBLE_EQ(1, result.latitude);
+    ASSERT_DOUBLE_EQ(2, result.longitude);
+}
+
+TEST(LatLngBounds, Northeast) {
+    auto result = LatLngBounds::hull({1, 2}, {3, 4}).northeast();
+    ASSERT_DOUBLE_EQ(3, result.latitude);
+    ASSERT_DOUBLE_EQ(4, result.longitude);
+}
+
+TEST(LatLngBounds, Southeast) {
+    auto result = LatLngBounds::hull({1, 2}, {3, 4}).southeast();
+    ASSERT_DOUBLE_EQ(1, result.latitude);
+    ASSERT_DOUBLE_EQ(4, result.longitude);
+}
+
+TEST(LatLngBounds, Northwest) {
+    auto result = LatLngBounds::hull({1, 2}, {3, 4}).northwest();
+    ASSERT_DOUBLE_EQ(3, result.latitude);
+    ASSERT_DOUBLE_EQ(2, result.longitude);
+}
+
+TEST(LatLng, FromTileID) {
+    for (int i = 0; i < 20; i++) {
+        const LatLng ll{ CanonicalTileID(i, 0, 0) };
+        ASSERT_DOUBLE_EQ(-util::LONGITUDE_MAX, ll.longitude);
+        ASSERT_DOUBLE_EQ(util::LATITUDE_MAX, ll.latitude);
+    }
+
+    {
+        const LatLng ll{ UnwrappedTileID(0, 1, 0) };
+        ASSERT_DOUBLE_EQ(util::LONGITUDE_MAX, ll.longitude);
+        ASSERT_DOUBLE_EQ(util::LATITUDE_MAX, ll.latitude);
+    }
+
+    {
+        const LatLng ll{ UnwrappedTileID(0, -1, 0) };
+        ASSERT_DOUBLE_EQ(-540, ll.longitude);
+        ASSERT_DOUBLE_EQ(util::LATITUDE_MAX, ll.latitude);
+    }
+}
+
+TEST(LatLng, Boundaries) {
+    LatLng coordinate;
+    ASSERT_DOUBLE_EQ(0, coordinate.latitude);
+    ASSERT_DOUBLE_EQ(0, coordinate.longitude);
+
+    coordinate.longitude = -180.1;
+    ASSERT_DOUBLE_EQ(-180.1, coordinate.longitude);
+
+    coordinate.wrap();
+    ASSERT_DOUBLE_EQ(179.90000000000001, coordinate.longitude); // 1E-14
+
+    coordinate.longitude = 180.9;
+    coordinate.wrap();
+    ASSERT_DOUBLE_EQ(-179.09999999999999, coordinate.longitude);
+
+    coordinate.longitude = -360.5;
+    coordinate.wrap();
+    ASSERT_DOUBLE_EQ(-0.5, coordinate.longitude);
+
+    coordinate.longitude = 360.5;
+    coordinate.wrap();
+    ASSERT_DOUBLE_EQ(0.5, coordinate.longitude);
+
+    coordinate.longitude = 360000.5;
+    coordinate.wrap();
+    ASSERT_DOUBLE_EQ(0.5, coordinate.longitude);
+}
+
+TEST(LatLngBounds, FromTileID) {
+    {
+        const LatLngBounds bounds{ CanonicalTileID(0, 0, 0) };
+        ASSERT_DOUBLE_EQ(-util::LONGITUDE_MAX, bounds.west());
+        ASSERT_DOUBLE_EQ(-util::LATITUDE_MAX, bounds.south());
+        ASSERT_DOUBLE_EQ(util::LONGITUDE_MAX, bounds.east());
+        ASSERT_DOUBLE_EQ(util::LATITUDE_MAX, bounds.north());
+    }
+
+    {
+        const LatLngBounds bounds{ CanonicalTileID(1, 0, 1) };
+        ASSERT_DOUBLE_EQ(-util::LONGITUDE_MAX, bounds.west());
+        ASSERT_DOUBLE_EQ(-util::LATITUDE_MAX, bounds.south());
+        ASSERT_DOUBLE_EQ(0, bounds.east());
+        ASSERT_DOUBLE_EQ(0, bounds.north());
+    }
+
+    {
+        const LatLngBounds bounds{ CanonicalTileID(1, 1, 1) };
+        ASSERT_DOUBLE_EQ(0, bounds.west());
+        ASSERT_DOUBLE_EQ(-util::LATITUDE_MAX, bounds.south());
+        ASSERT_DOUBLE_EQ(util::LONGITUDE_MAX, bounds.east());
+        ASSERT_DOUBLE_EQ(0, bounds.north());
+    }
+
+    {
+        const LatLngBounds bounds{ CanonicalTileID(1, 0, 0) };
+        ASSERT_DOUBLE_EQ(-util::LONGITUDE_MAX, bounds.west());
+        ASSERT_DOUBLE_EQ(0, bounds.south());
+        ASSERT_DOUBLE_EQ(0, bounds.east());
+        ASSERT_DOUBLE_EQ(util::LATITUDE_MAX, bounds.north());
+    }
+}