prop_string_equals
bool prop_string_equals(prop_string_t, prop_string_t);
if (!prop_string_equals(obj1, obj))
if (prop_string_equals(obj2, tobj)) {
ATF_REQUIRE(!prop_string_equals(s1, s2));
ATF_REQUIRE(prop_string_equals(s2, s3));
if (prop_string_equals(lindex, obj)) {