public void testPeek(){
  storedQueue.clear();
  assertTrue(storedQueue.isEmpty());
  populatedQueue(SIZE,storedQueue);
  int initialSize=storedQueue.size();
  assertNotNull(storedQueue.peek());
  assertEquals(initialSize,storedQueue.size());
}

public void testPeek ( ) { storedQueue . clear ( ) ; assertTrue ( storedQueue . isEmpty ( ) ) ; populatedQueue ( SIZE , storedQueue ) ; int initialSize = storedQueue . size ( ) ; assertNotNull ( storedQueue . peek ( ) ) ; assertEquals ( initialSize , storedQueue . size ( ) ) ; }
peek returns next element , or null if empty
