function test_hook1() {
var a = new_hook("kaka");
var b = a;
assert( show_hooks() == 1, " show_hooks 1");
a = null;
assert( show_hooks() == 1, " show_hooks 2");
print_hook(b);
b = null;
assert( show_hooks() == 0, " show_hooks 3");
console.log("-------- END TESTING -----------");
}
test_hook1();