int size = newset.size();
assertTrue("keyset and newset don't have same size",
newset.size() == size);
assertTrue("element is in newset ", !newset.contains(key));
assertTrue("element not removed from keyset", !set.contains(key));
assertTrue("element not removed from map", !map.containsKey(key));
assertTrue("newset and keyset do not have same elements 1", newset
.equals(set));
assertTrue("newset and keyset do not have same elements 2", set
.equals(newset));