1 files changed, 50 insertions, 0 deletions
diff --git a/coding/coding_tests/pointd_to_pointu_tests.cpp b/coding/coding_tests/pointd_to_pointu_tests.cpp
new file mode 100644
index 0000000000..6b5c286d98
--- /dev/null
+++ b/coding/coding_tests/pointd_to_pointu_tests.cpp
@@ -0,0 +1,50 @@
+#include "testing/testing.hpp"
+
+#include "coding/pointd_to_pointu.hpp"
+
+#include "base/logging.hpp"
+
+#include <cmath>
+
+using namespace std;
+
+namespace
+{
+uint32_t const kCoordBits = POINT_COORD_BITS;
+}  // namespace
+
+UNIT_TEST(PointDToPointU_Epsilons)
+{
+  m2::PointD const arrPt[] = {{-180, -180}, {-180, 180}, {180, 180}, {180, -180}};
+  m2::PointD const arrD[] = {{1, 1}, {1, -1}, {-1, -1}, {-1, 1}};
+  size_t const count = ARRAY_SIZE(arrPt);
+
+  /*
+  double eps = 1.0;
+  for (; true; eps = eps / 10.0)
+  {
+    size_t i = 0;
+    for (; i < count; ++i)
+    {
+      m2::PointU p = PointDToPointU(arrPt[i].x, arrPt[i].y, kCoordBits);
+      m2::PointU p1 = PointDToPointU(arrPt[i].x + arrD[i].x * eps,
+                                    arrPt[i].y + arrD[i].y * eps,
+                                    kCoordBits);
+
+      if (p != p1) break;
+    }
+    if (i == count) break;
+  }
+
+  LOG(LINFO, ("Epsilon = ", eps));
+  */
+
+  for (size_t i = 0; i < count; ++i)
+  {
+    m2::PointU const p1 = PointDToPointU(arrPt[i].x, arrPt[i].y, kCoordBits);
+    m2::PointU const p2(p1.x + arrD[i].x, p1.y + arrD[i].y);
+    m2::PointD const p3 = PointUToPointD(p2, kCoordBits);
+
+    LOG(LINFO, ("Dx = ", p3.x - arrPt[i].x, "Dy = ", p3.y - arrPt[i].y));
+  }
+}