[core] Add unit test for calculateTileDistances

1 files changed, 27 insertions, 0 deletions

diff --git a/test/text/calculate_tile_distances.test.cpp b/test/text/calculate_tile_distances.test.cpp
new file mode 100644
index 0000000000..990de3d4ec
--- /dev/null
+++ b/test/text/calculate_tile_distances.test.cpp
@@ -0,0 +1,27 @@
+#include <mbgl/test/util.hpp>
+
+#include <mbgl/geometry/anchor.hpp>
+#include <mbgl/layout/symbol_layout.hpp>
+#include <mbgl/tile/geometry_tile_data.hpp>
+
+using namespace mbgl;
+
+TEST(calculateTileDistances, Point) {
+    const GeometryCoordinates line = {Point<int16_t>{1, 1}};
+    const auto distances = SymbolLayout::calculateTileDistances(line, Anchor(1.0f, 1.0f, .0f, 0u));
+    EXPECT_EQ(distances.size(), 1u);
+    EXPECT_EQ(distances[0], .0f);
+}
+
+TEST(calculateTileDistances, Line) {
+    const GeometryCoordinates line = {
+        Point<int16_t>{1, 1}, Point<int16_t>{1, 2}, Point<int16_t>{1, 3}, Point<int16_t>{1, 4}};
+    const auto distances = SymbolLayout::calculateTileDistances(line, Anchor(1.0f, 3.0f, .0f, 2u));
+    EXPECT_EQ(distances, std::vector<float>({2.0f, 1.0f, 0.0f, 1.0f}));
+}
+
+TEST(calculateTileDistances, EmptySegment) {
+    const GeometryCoordinates line = {};
+    const auto distances = SymbolLayout::calculateTileDistances(line, Anchor(1.0f, 1.0f, .0f));
+    EXPECT_EQ(distances.size(), 0u);
+}