Add a unitary test for Delaunay complex

2 files changed, 76 insertions, 0 deletions

diff --git a/src/Alpha_complex/test/CMakeLists.txt b/src/Alpha_complex/test/CMakeLists.txt
index 0476c6d4..fe4b23e4 100644
--- a/src/Alpha_complex/test/CMakeLists.txt
+++ b/src/Alpha_complex/test/CMakeLists.txt
@@ -8,11 +8,15 @@ if (NOT CGAL_WITH_EIGEN3_VERSION VERSION_LESS 4.11.0)
 
   add_executable ( Alpha_complex_test_unit Alpha_complex_unit_test.cpp )
   target_link_libraries(Alpha_complex_test_unit ${CGAL_LIBRARY})
+  add_executable ( Delaunay_complex_test_unit Delaunay_complex_unit_test.cpp )
+  target_link_libraries(Delaunay_complex_test_unit ${CGAL_LIBRARY})
   if (TBB_FOUND)
     target_link_libraries(Alpha_complex_test_unit ${TBB_LIBRARIES})
+    target_link_libraries(Delaunay_complex_test_unit ${TBB_LIBRARIES})
   endif()
 
   gudhi_add_boost_test(Alpha_complex_test_unit)
+  gudhi_add_boost_test(Delaunay_complex_test_unit)
 
   add_executable ( Alpha_complex_3d_test_unit Alpha_complex_3d_unit_test.cpp )
   target_link_libraries(Alpha_complex_3d_test_unit ${CGAL_LIBRARY})
diff --git a/src/Alpha_complex/test/Delaunay_complex_unit_test.cpp b/src/Alpha_complex/test/Delaunay_complex_unit_test.cpp
new file mode 100644
index 00000000..71164705
--- /dev/null
+++ b/src/Alpha_complex/test/Delaunay_complex_unit_test.cpp
@@ -0,0 +1,72 @@
+/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+ *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
+ *    Author(s):       Vincent Rouvreau
+ *
+ *    Copyright (C) 2020 Inria
+ *
+ *    Modification(s):
+ *      - YYYY/MM Author: Description of the modification
+ */
+
+#define BOOST_TEST_DYN_LINK
+#define BOOST_TEST_MODULE "delaunay_complex"
+#include <boost/test/unit_test.hpp>
+#include <boost/mpl/list.hpp>
+
+#include <CGAL/Epick_d.h>
+#include <CGAL/Epeck_d.h>
+
+#include <vector>
+#include <limits>  // NaN
+#include <cmath>
+
+#include <gudhi/Alpha_complex.h>
+// to construct a simplex_tree from Delaunay_triangulation
+#include <gudhi/graph_simplicial_complex.h>
+#include <gudhi/Simplex_tree.h>
+#include <gudhi/Unitary_tests_utils.h>
+#include <gudhi/random_point_generators.h>
+
+// Use dynamic_dimension_tag for the user to be able to set dimension
+typedef CGAL::Epeck_d< CGAL::Dynamic_dimension_tag > Exact_kernel_d;
+// Use static dimension_tag for the user not to be able to set dimension
+typedef CGAL::Epeck_d< CGAL::Dimension_tag<5> > Exact_kernel_s;
+// Use dynamic_dimension_tag for the user to be able to set dimension
+typedef CGAL::Epick_d< CGAL::Dynamic_dimension_tag > Inexact_kernel_d;
+// Use static dimension_tag for the user not to be able to set dimension
+typedef CGAL::Epick_d< CGAL::Dimension_tag<5> > Inexact_kernel_s;
+// The triangulation uses the default instantiation of the TriangulationDataStructure template parameter
+
+typedef boost::mpl::list<Exact_kernel_d, Exact_kernel_s, Inexact_kernel_d, Inexact_kernel_s> list_of_kernel_variants;
+
+BOOST_AUTO_TEST_CASE_TEMPLATE(Alpha_complex_from_OFF_file, TestedKernel, list_of_kernel_variants) {
+  std::cout << "*****************************************************************************************************";
+  using Point = typename TestedKernel::Point_d;
+  std::vector<Point> points;
+  // 50 points on a 4-sphere
+  points = Gudhi::generate_points_on_sphere_d<TestedKernel>(10, 5, 1.);
+
+  Gudhi::alpha_complex::Alpha_complex<TestedKernel> alpha_complex(points);
+
+  // Alpha complex
+  Gudhi::Simplex_tree<> stree_from_alpha_complex;
+  BOOST_CHECK(alpha_complex.create_complex(stree_from_alpha_complex));
+  stree_from_alpha_complex.initialize_filtration();
+
+  // Delaunay complex
+  Gudhi::Simplex_tree<> stree_from_delaunay_complex;
+  BOOST_CHECK(alpha_complex.create_complex(stree_from_delaunay_complex, 0., false, true));
+
+  // Check all the simplices from alpha complex are in the Delaunay complex
+  for (auto f_simplex : stree_from_alpha_complex.filtration_simplex_range()) {
+    std::vector<Gudhi::Simplex_tree<>::Vertex_handle> simplex;
+    for (Gudhi::Simplex_tree<>::Vertex_handle vertex : stree_from_alpha_complex.simplex_vertex_range(f_simplex)) {
+      std::cout << "(" << vertex << ")";
+      simplex.push_back(vertex);
+    }
+    std::cout << std::endl;
+    Gudhi::Simplex_tree<>::Simplex_handle sh = stree_from_delaunay_complex.find(simplex);
+    BOOST_CHECK(std::isnan(stree_from_delaunay_complex.filtration(sh)));
+    BOOST_CHECK(sh != stree_from_delaunay_complex.null_simplex());
+  }
+}