Coding site with test harness for basic data structures like linked list,graph,strings etc [closed]

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Are there any coding sites with test harness for basic data structures and with basic problems like arrays,strings,linked list,graph adjacency list etc, so that I can brush up on basic codes like reversing linked list, checking if linked list is palindrome, sorting linked list, finding a substring in a string etc. This would make basic DS brushing fun.

I know there are sites like codechef and topcoder, but from what I have seen, these don't have such basic list,graph conceptual DS questions and test harness.

And, it can also be perhaps used for undergrad course in DS..