3 files changed, 40 insertions, 0 deletions
diff --git a/test/platform/CMakeLists.txt b/test/platform/CMakeLists.txt
index 394aa247..6a00ff21 100644
--- a/test/platform/CMakeLists.txt
+++ b/test/platform/CMakeLists.txt
@@ -4,6 +4,8 @@ add_executable(CruPlatformBaseTest
 )
 target_link_libraries(CruPlatformBaseTest PRIVATE CruPlatformBase CruTestBase)
 
+add_subdirectory(graphics)
+
 if (WIN32)
 	add_subdirectory(graphics/direct2d)
 endif()
diff --git a/test/platform/graphics/CMakeLists.txt b/test/platform/graphics/CMakeLists.txt
new file mode 100644
index 00000000..22be21e6
--- /dev/null
+++ b/test/platform/graphics/CMakeLists.txt
@@ -0,0 +1,6 @@
+add_executable(CruPlatformGraphicsTest
+	GeometryTest.cpp
+)
+target_link_libraries(CruPlatformGraphicsTest PRIVATE CruPlatformGraphics CruTestBase)
+
+cru_catch_discover_tests(CruPlatformGraphicsTest)
diff --git a/test/platform/graphics/GeometryTest.cpp b/test/platform/graphics/GeometryTest.cpp
new file mode 100644
index 00000000..8a48ddde
--- /dev/null
+++ b/test/platform/graphics/GeometryTest.cpp
@@ -0,0 +1,32 @@
+#include "cru/platform/graphics/Geometry.h"
+
+#include <catch2/catch_test_macros.hpp>
+#include <numbers>
+#include "catch2/catch_approx.hpp"
+
+using Catch::Approx;
+using cru::platform::graphics::IGeometryBuilder;
+
+constexpr float margin = 0.000001;
+
+TEST_CASE("IGeometryBuilder CalculateArcInfo", "[graphics][geometry]") {
+  auto test = [](float start_x, float start_y, float radius_x, float radius_y,
+                 float angle, bool is_large_arc, bool is_clockwise, float end_x,
+                 float end_y, float expect_center_x, float expect_center_y,
+                 float expect_start_angle, float expect_end_angle) {
+    auto info = IGeometryBuilder::CalculateArcInfo(
+        {start_x, start_y}, {radius_x, radius_y}, angle, is_large_arc,
+        is_clockwise, {end_x, end_y});
+    REQUIRE(info.center.x == Approx(expect_center_x).margin(margin));
+    REQUIRE(info.center.y == Approx(expect_center_y).margin(margin));
+    REQUIRE(info.start_angle == Approx(expect_start_angle).margin(margin));
+    REQUIRE(info.end_angle == Approx(expect_end_angle).margin(margin));
+  };
+
+  test(1, 0, 1, 1, 0, false, true, 0, 1, 0, 0, 0, std::numbers::pi / 2);
+  test(0, 1, 1, 1, 0, false, true, -1, 0, 0, 0, std::numbers::pi / 2,
+       std::numbers::pi);
+  test(-1, 0, 1, 1, 0, false, true, 0, -1, 0, 0, std::numbers::pi,
+       -std::numbers::pi / 2);
+  test(0, -1, 1, 1, 0, false, true, 1, 0, 0, 0, -std::numbers::pi / 2, 0);
+}