public class Program {
    public static void main(String[] args) {
        LinkedList list = new LinkedList();
        assert list.size() == 0 : "Expected 0 but was " + list.size();
        
        // All tests are passed!
        System.out.println("All tests are passed!");
    }
}

// LinkedList class
class LinkedList {
    public int size() {
        return 0;
    }
}
@@ -172,24 +172,188 @@
 ist.size();%0A
+        assert list.getHead() == null : %22Expecte null but was %22 + list.getHead();%0A        assert list.getTail() == null : %22Expecte null but was %22 + list.getTail();%0A
         %0A   
@@ -482,16 +482,144 @@
 edList %7B
+    %0A    public Object getHead() %7B%0A        return null;%0A    %7D%0A    %0A    public Object getTail() %7B%0A        return null;%0A    %7D%0A    
 %0A    pub

check for head and tail of linkedlist