added tests to cmake

CMakeLists.txt

@@ -9,3 +9,14 @@ add_subdirectory(pybind11)
 include_directories(${OPENMESH_INCLUDE_DIRS})
 pybind11_add_module(openmesh src/Bindings.cc src/InputOutput.cc src/Miscellaneous.cc)
 target_link_libraries(openmesh PRIVATE ${OPENMESH_LIBRARIES})
+
+enable_testing()
+add_test(
+	NAME discover_tests
+	COMMAND ${PYTHON_EXECUTABLE} -m unittest
+	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/tests
+)
+set_tests_properties(
+	discover_tests PROPERTIES
+	ENVIRONMENT PYTHONPATH=${CMAKE_CURRENT_BINARY_DIR}
+)