rem: void insert_key_action_test(boost::unit_test_framework::test_suite* test)
add: void insert_key_action_test()
context: void insert_key_action_test(boost::unit_test_framework::test_suite* test){    test->add( BOOST_TEST_CASE(&insert_key_single_argument_test ) );    test->add( BOOST_TEST_CASE(&insert_key_two_arguments_test ) );}