[unittest] add unit tests for std::array

unittest/CMakeLists.txt

@@ -38,6 +38,7 @@ if(NOT NUMPY_WITH_BROKEN_UFUNC_SUPPORT)
   add_lib_unit_test(user_type)
 endif()
 add_lib_unit_test(std_vector)
+add_lib_unit_test(std_array)
 add_lib_unit_test(user_struct)
 
 function(config_bind_optional tagname opttype)
@@ -110,6 +111,10 @@ add_python_unit_test("py-std-vector" "unittest/python/test_std_vector.py"
                      "python;unittest")
 set_tests_properties("py-std-vector" PROPERTIES DEPENDS ${PYWRAP})
 
+add_python_unit_test("py-std-array" "unittest/python/test_std_array.py"
+                     "python;unittest")
+set_tests_properties("py-std-array" PROPERTIES DEPENDS ${PYWRAP})
+
 add_python_unit_test("py-user-struct" "unittest/python/test_user_struct.py"
                      "python;unittest")
 set_tests_properties("py-user-struct" PROPERTIES DEPENDS ${PYWRAP})

unittest/python/test_std_array.py

@@ -0,0 +1,13 @@
+import std_array
+
+
+ints = std_array.get_arr_3_ints()
+print(ints[0])
+print(ints[1])
+print(ints[2])
+print(ints.tolist())
+
+vecs = std_array.get_arr_3_vecs()
+print(vecs[0])
+print(vecs[1])
+print(vecs[2])

unittest/std_array.cpp

@@ -0,0 +1,28 @@
+/// @file
+/// @copyright Copyright 2023 CNRS INRIA
+
+#include "eigenpy/std-array.hpp"
+
+using Eigen::VectorXd;
+
+std::array<int, 3> get_arr_3_ints() { return {1, 2, 3}; }
+
+std::array<VectorXd, 3> get_arr_3_vecs() {
+  std::array<VectorXd, 3> out;
+  out[0].setOnes(4);
+  out[1].setZero(2);
+  out[2].setRandom(10);
+  return out;
+}
+
+BOOST_PYTHON_MODULE(std_array) {
+  using namespace eigenpy;
+
+  enableEigenPy();
+
+  StdArrayPythonVisitor<std::array<int, 3> >::expose("StdArr3_int");
+  exposeStdArrayEigenSpecificType<VectorXd, 3>("VectorXd");
+
+  bp::def("get_arr_3_ints", get_arr_3_ints);
+  bp::def("get_arr_3_vecs", get_arr_3_vecs);
+}