test for exceptions add example

unittest/c-library/CMakeLists.txt

@@ -35,6 +35,13 @@ else()
 endif()
 list(APPEND TEST_CONFIG_DEFS -DLAMMPS_HAS_MPI=${HAS_MPI})
 
+if(LAMMPS_EXCEPTION)
+  set(HAS_EXCEPTIONS 1)
+else()
+  set(HAS_EXCEPTIONS 0)
+endif()
+list(APPEND TEST_CONFIG_DEFS -DLAMMPS_HAS_EXCEPTIONS=${HAS_EXCEPTIONS})
+
 foreach(WITH "JPEG" "PNG" "GZIP" "FFMPEG")
   if(WITH_${WITH})
     set(HAS_${WITH} 1)

unittest/c-library/test_library_config.cpp

@@ -118,6 +118,11 @@ TEST_F(LibraryConfig, style_name)
     EXPECT_THAT(buf, StrEq(""));
 };
 
+TEST(LAMMPSConfig, exceptions)
+{
+    EXPECT_EQ(lammps_config_has_exceptions(), LAMMPS_HAS_EXCEPTIONS);
+};
+
 TEST(LAMMPSConfig, mpi_support)
 {
     EXPECT_EQ(lammps_config_has_mpi_support(), LAMMPS_HAS_MPI);