15 s_is_null(
void **state) {
    16     assert_null(pcmk__s(NULL, NULL));
    17     assert_string_equal(pcmk__s(NULL, 
""), 
"");
    18     assert_string_equal(pcmk__s(NULL, 
"something"), 
"something");
    22 s_is_not_null(
void **state) {
    23     assert_string_equal(pcmk__s(
"something", NULL), 
"something");
    24     assert_string_equal(pcmk__s(
"something", 
"default"), 
"something");
    28                 cmocka_unit_test(s_is_null),
    29                 cmocka_unit_test(s_is_not_null))
 PCMK__UNIT_TEST(NULL, NULL, cmocka_unit_test(bad_input), cmocka_unit_test(not_found), cmocka_unit_test(find_attrB), cmocka_unit_test(find_attrA_matching))