changes to skiplist and tests

data_structures/skiplist/skipnode.hpp

@@ -5,7 +5,7 @@
 #include <atomic>
 #include <mutex>
 
-#include "utils/sync/spinlock.hpp"
+#include "sync/spinlock.hpp"
 
 // concurrent skiplist node based on the implementation described in
 // "A Provably Correct Scalable Concurrent Skip List"

test/skiplist.cpp

@@ -42,3 +42,7 @@ TEST_CASE("New height distribution must be approx. 1/2 1/4 1/8 ...")
         REQUIRE(relative_error < error_margin);
     }
 }
+
+TEST_CASE("You can add an item to the skiplist")
+{
+}