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diff --git a/intern/opensubdiv/internal/topology/mesh_topology_test.cc b/intern/opensubdiv/internal/topology/mesh_topology_test.cc
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+++ b/intern/opensubdiv/internal/topology/mesh_topology_test.cc
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+// Copyright 2020 Blender Foundation. All rights reserved.
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software Foundation,
+// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+//
+// Author: Sergey Sharybin
+
+#include "internal/topology/mesh_topology.h"
+#include "testing/testing.h"
+
+namespace blender {
+namespace opensubdiv {
+
+TEST(MeshTopology, TrivialVertexSharpness)
+{
+  MeshTopology mesh_topology;
+
+  mesh_topology.setNumVertices(3);
+  mesh_topology.finishResizeTopology();
+
+  mesh_topology.setVertexSharpness(0, 0.1f);
+  mesh_topology.setVertexSharpness(1, 0.2f);
+
+  EXPECT_EQ(mesh_topology.getVertexSharpness(0), 0.1f);
+  EXPECT_EQ(mesh_topology.getVertexSharpness(1), 0.2f);
+  EXPECT_EQ(mesh_topology.getVertexSharpness(2), 0.0f);
+}
+
+TEST(MeshTopology, TrivialEdgeSharpness)
+{
+  MeshTopology mesh_topology;
+
+  mesh_topology.setNumVertices(8);
+  mesh_topology.setNumEdges(3);
+  mesh_topology.finishResizeTopology();
+
+  mesh_topology.setEdgeVertexIndices(0, 0, 1);
+  mesh_topology.setEdgeVertexIndices(1, 1, 2);
+  mesh_topology.setEdgeVertexIndices(2, 2, 3);
+
+  mesh_topology.setEdgeSharpness(0, 0.1f);
+  mesh_topology.setEdgeSharpness(2, 0.2f);
+
+  EXPECT_EQ(mesh_topology.getEdgeSharpness(0), 0.1f);
+  EXPECT_EQ(mesh_topology.getEdgeSharpness(1), 0.0f);
+  EXPECT_EQ(mesh_topology.getEdgeSharpness(2), 0.2f);
+}
+
+TEST(MeshTopology, TrivialFaceTopology)
+{
+  MeshTopology mesh_topology;
+
+  mesh_topology.setNumFaces(3);
+  mesh_topology.setNumFaceVertices(0, 4);
+  mesh_topology.setNumFaceVertices(1, 3);
+  mesh_topology.setNumFaceVertices(2, 5);
+  mesh_topology.finishResizeTopology();
+
+  EXPECT_EQ(mesh_topology.getNumFaceVertices(0), 4);
+  EXPECT_EQ(mesh_topology.getNumFaceVertices(1), 3);
+  EXPECT_EQ(mesh_topology.getNumFaceVertices(2), 5);
+
+  {
+    int vertex_indices[] = {0, 1, 2, 3};
+    mesh_topology.setFaceVertexIndices(0, 4, vertex_indices);
+  }
+
+  {
+    int vertex_indices[] = {4, 5, 6};
+    mesh_topology.setFaceVertexIndices(1, 3, vertex_indices);
+  }
+
+  {
+    int vertex_indices[] = {7, 8, 9, 10, 11};
+    mesh_topology.setFaceVertexIndices(2, 5, vertex_indices);
+  }
+
+  EXPECT_TRUE(mesh_topology.isFaceVertexIndicesEqual(0, {{0, 1, 2, 3}}));
+  EXPECT_FALSE(mesh_topology.isFaceVertexIndicesEqual(0, {{10, 1, 2, 3}}));
+  EXPECT_FALSE(mesh_topology.isFaceVertexIndicesEqual(0, {{0, 1, 2}}));
+
+  EXPECT_TRUE(mesh_topology.isFaceVertexIndicesEqual(1, {{4, 5, 6}}));
+  EXPECT_TRUE(mesh_topology.isFaceVertexIndicesEqual(2, {{7, 8, 9, 10, 11}}));
+}
+
+}  // namespace opensubdiv
+}  // namespace blender