added unitary tests for kernels

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/kernels@3391 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: d383ed76f3cfd3724449cb7e8c24b895a7322d52

2 files changed, 59 insertions, 0 deletions

diff --git a/src/Persistence_representations/test/CMakeLists.txt b/src/Persistence_representations/test/CMakeLists.txt
index 335a71ef..ca1713c3 100644
--- a/src/Persistence_representations/test/CMakeLists.txt
+++ b/src/Persistence_representations/test/CMakeLists.txt
@@ -35,6 +35,11 @@ target_link_libraries(Read_persistence_from_file_test_unit ${Boost_UNIT_TEST_FRA
 
 gudhi_add_coverage_test(Read_persistence_from_file_test_unit)
 
+add_executable ( kernels_unit kernels.cpp )
+target_link_libraries(kernels_unit ${Boost_UNIT_TEST_FRAMEWORK_LIBRARY})
+
+gudhi_add_coverage_test(kernels_unit)
+
 if (NOT CGAL_WITH_EIGEN3_VERSION VERSION_LESS 4.8.1)
  add_executable (Persistence_intervals_with_distances_test_unit persistence_intervals_with_distances_test.cpp )
  target_link_libraries(Persistence_intervals_with_distances_test_unit ${Boost_UNIT_TEST_FRAMEWORK_LIBRARY})
diff --git a/src/Persistence_representations/test/kernels.cpp b/src/Persistence_representations/test/kernels.cpp
new file mode 100644
index 00000000..9db19123
--- /dev/null
+++ b/src/Persistence_representations/test/kernels.cpp
@@ -0,0 +1,54 @@
+/*    This file is part of the Gudhi Library. The Gudhi library
+ *    (Geometric Understanding in Higher Dimensions) is a generic C++
+ *    library for computational topology.
+ *
+ *    Author(s):       Mathieu Carrière
+ *
+ *    Copyright (C) 2018  INRIA
+ *
+ *    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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#define BOOST_TEST_DYN_LINK
+#define BOOST_TEST_MODULE "kernel"
+
+#include <boost/test/unit_test.hpp>
+#include <cmath>  // float comparison
+#include <limits>
+#include <string>
+#include <vector>
+#include <algorithm>  // std::max
+#include <gudhi/common_persistence_representations.h>
+#include <gudhi/Weight_functions.h>
+#include <gudhi/Persistence_weighted_gaussian.h>
+#include <gudhi/Sliced_Wasserstein.h>
+#include <gudhi/distance_functions.h>
+#include <gudhi/reader_utils.h>
+
+using SW = Gudhi::Persistence_representations::Sliced_Wasserstein;
+using PWG = Gudhi::Persistence_representations::Persistence_weighted_gaussian;
+
+BOOST_AUTO_TEST_CASE(check_PWG) {
+  Persistence_diagram v1, v2; v1.emplace_back(0,1); v2.emplace_back(0,2);
+  PWG pwg1(v1, 1.0, 1000, Gudhi::Persistence_representations::arctan_weight(1,1)); PWG pwgex1(v1, 1.0, -1, Gudhi::Persistence_representations::arctan_weight(1,1));
+  PWG pwg2(v2, 1.0, 1000, Gudhi::Persistence_representations::arctan_weight(1,1)); PWG pwgex2(v2, 1.0, -1, Gudhi::Persistence_representations::arctan_weight(1,1));
+  BOOST_CHECK(std::abs(pwg1.compute_scalar_product(pwg2) - pwgex1.compute_scalar_product(pwgex2)) <= 1e-1);
+}
+
+BOOST_AUTO_TEST_CASE(check_SW) {
+  Persistence_diagram v1, v2; v1.emplace_back(0,1); v2.emplace_back(0,2);
+  SW sw1(v1, 1.0, 100); SW swex1(v1, 1.0, -1);
+  SW sw2(v2, 1.0, 100); SW swex2(v2, 1.0, -1);
+  BOOST_CHECK(std::abs(sw1.compute_scalar_product(sw2) - swex1.compute_scalar_product(swex2)) <= 1e-1);
+}