Added unittests for prev halfedge attribute

src/Unittests/CMakeLists.txt

@@ -39,6 +39,7 @@ unittests_stripifier.cc
 unittests_subdivider_adaptive.cc
 unittests_subdivider_uniform.cc
 unittests_trimesh_circulator_current_halfedge_handle_replacement.cc
+unittests_traits.cc
 unittests_trimesh_circulator_face_edge.cc
 unittests_trimesh_circulator_face_face.cc
 unittests_trimesh_circulator_face_halfedge.cc

src/Unittests/unittests_traits.cc

@@ -0,0 +1,67 @@
+#include <gtest/gtest.h>
+#include <Unittests/unittests_common.hh>
+#include <iostream>
+
+namespace {
+    
+class OpenMeshPrevHalfedge : public OpenMeshBase {
+
+    protected:
+
+        // This function is called before each test is run
+        virtual void SetUp() {
+            
+            // Do some initial stuff with the member data here...
+        }
+
+        // This function is called after all tests are through
+        virtual void TearDown() {
+
+            // Do some final stuff with the member data here...
+        }
+
+    // Member already defined in OpenMeshBase
+    //Mesh mesh_;  
+};
+
+/*
+ * ====================================================================
+ * Define tests below
+ * ====================================================================
+ */
+
+/* creates a Halfedge WITHOUT the PrevHalfedge Attribute
+ */
+TEST_F(OpenMeshPrevHalfedge, RemovePrevHalfedge) {
+
+    mesh_.clear();
+
+    struct MeshTraits : OpenMesh::DefaultTraits {
+        HalfedgeAttributes(0);
+    };
+    using MeshT = OpenMesh::TriMesh_ArrayKernelT<MeshTraits>;
+
+
+    // Check if Prev Halfedge is referenced
+    EXPECT_EQ(12u, sizeof(MeshT::Halfedge) ) << "Wrong size of Halfedge";
+    EXPECT_EQ(0u, MeshT::HasPrevHalfedge::my_bool )    << "Attribute HasPrevHalfedge is wrong";
+}
+
+/* creates a Halfedge WITH the PrevHalfedge Attribute
+ */
+TEST_F(OpenMeshPrevHalfedge, HavePrevHalfedge) {
+
+    mesh_.clear();
+
+    struct MeshTraits : OpenMesh::DefaultTraits {
+        //HalfedgeAttributes(0);
+    };
+    using MeshT = OpenMesh::TriMesh_ArrayKernelT<MeshTraits>;
+
+
+    // Check if Prev Halfedge is referenced
+    EXPECT_EQ(16u, sizeof(MeshT::Halfedge) ) << "Wrong size of Halfedge";
+    EXPECT_EQ(1u, MeshT::HasPrevHalfedge::my_bool )    << "Attribute HasPrevHalfedge is wrong";
+}
+
+}