create unit tests for C++11 PropertyManager features

src/Unittests/unittests_propertymanager.cc

@@ -26,7 +26,7 @@ class OpenMeshPropertyManager : public OpenMeshBase {
 
 /*
  * ====================================================================
- * Define tests below
+ * General Tests
  * ====================================================================
  */
 
@@ -92,11 +92,112 @@ TEST_F(OpenMeshPropertyManager, set_range_bool) {
       ASSERT_TRUE(pm_f_bool[*f_it]);
 }
 
+/*
+ * ====================================================================
+ * C++11 Specific Tests
+ * ====================================================================
+ */
+#if _MSC_VER >= 1900 || __cplusplus > 199711L || defined(__GXX_EXPERIMENTAL_CXX0X__)
 
+template<typename PropHandle, typename Mesh>
+bool has_property(const Mesh& _mesh, const std::string& _name) {
+    auto dummy_handle = PropHandle{};
+    return _mesh.get_property_handle(dummy_handle, _name);
+}
 
+/*
+ * Temporary property
+ */
+TEST_F(OpenMeshPropertyManager, cpp11_temp_property) {
+    using handle_type = OpenMesh::VPropHandleT<int>;
+    const auto prop_name = "pm_v_test_property";
+    ASSERT_FALSE(has_property<handle_type>(mesh_, prop_name));
 
+    {
+        auto vprop = OpenMesh::makePropertyManagerFromNew<handle_type>(mesh_, prop_name);
+        static_cast<void>(vprop); // Unused variable
+        ASSERT_TRUE(has_property<handle_type>(mesh_, prop_name));
+    }
 
+    ASSERT_FALSE(has_property<handle_type>(mesh_, prop_name));
+}
 
+/*
+ * Two temporary properties on a mesh using the same name and type. The second
+ * (inner) one shadows the first (outer) one instead of aliasing.
+ */
+TEST_F(OpenMeshPropertyManager, cpp11_temp_property_shadowing) {
+    auto vh = mesh_.add_vertex({0,0,0}); // Dummy vertex to attach properties to
 
+    using handle_type = OpenMesh::VPropHandleT<int>;
+    const auto prop_name = "pm_v_test_property";
+
+    auto outer_prop = OpenMesh::makePropertyManagerFromNew<handle_type>(mesh_, prop_name);
+    outer_prop[vh] = 100;
+    ASSERT_EQ(100, outer_prop[vh]);
+
+    {
+        // inner_prop uses same type and name as outer_prop
+        auto inner_prop = OpenMesh::makePropertyManagerFromNew<handle_type>(mesh_, prop_name);
+        inner_prop[vh] = 200;
+        ASSERT_EQ(200, inner_prop[vh]);
+        // End of scope: inner_prop is removed from mesh_
+    }
+
+    // Ensure outer_prop still exists and its data has not been overwritten by inner_prop
+    ASSERT_TRUE(has_property<handle_type>(mesh_, prop_name));
+    ASSERT_EQ(100, outer_prop[vh]);
+}
+
+/*
+ * In sequence:
+ * - add a persistent property to a mesh
+ * - retrieve an existing property of a mesh and modify it
+ * - obtain a non-owning property handle
+ * - attempt to obtain a non-owning handle to a non-existing property (throws)
+ */
+TEST_F(OpenMeshPropertyManager, cpp11_persistent_and_non_owning_properties) {
+    auto vh = mesh_.add_vertex({0,0,0}); // Dummy vertex to attach properties to
+
+    using handle_type = OpenMesh::VPropHandleT<int>;
+    const auto prop_name = "pm_v_test_property";
+
+    ASSERT_FALSE(has_property<handle_type>(mesh_, prop_name));
+
+    {
+        auto prop = OpenMesh::makePropertyManagerFromExistingOrNew<handle_type>(mesh_, prop_name);
+        prop[vh] = 100;
+        // End of scope, property persists
+    }
+
+    ASSERT_TRUE(has_property<handle_type>(mesh_, prop_name));
+
+    {
+        // Since a property of the same name and type already exists, this refers to the existing property.
+        auto prop = OpenMesh::makePropertyManagerFromExistingOrNew<handle_type>(mesh_, prop_name);
+        ASSERT_EQ(100, prop[vh]);
+        prop[vh] = 200;
+        // End of scope, property persists
+    }
+
+    ASSERT_TRUE(has_property<handle_type>(mesh_, prop_name));
+
+    {
+        // Acquire non-owning handle to the property, knowing it exists
+        auto prop = OpenMesh::makePropertyManagerFromExisting<handle_type>(mesh_, prop_name);
+        ASSERT_EQ(200, prop[vh]);
+    }
+
+    ASSERT_TRUE(has_property<handle_type>(mesh_, prop_name));
+
+    {
+        // Attempt to acquire non-owning handle for a non-existing property
+        ASSERT_THROW(OpenMesh::makePropertyManagerFromExisting<handle_type>(mesh_, "wrong_property_name"), std::runtime_error);
+    }
+
+    ASSERT_TRUE(has_property<handle_type>(mesh_, prop_name));
+}
+
+#endif
 
 }