Write a function to find the union of elements of the given tuples.
def union_elements(test_tup1, test_tup2):
  res = tuple(set(test_tup1 + test_tup2))
  return (res) 
<s>[INST]<<SYS>>Given a task and its code, generate test cases for the code.<</SYS>>Write a function to find the union of elements of the given tuples.
def union_elements(test_tup1, test_tup2):
  res = tuple(set(test_tup1 + test_tup2))
  return (res) [/INST]assert union_elements((3, 4, 5, 6),(5, 7, 4, 10) ) == (3, 4, 5, 6, 7, 10)
assert union_elements((1, 2, 3, 4),(3, 4, 5, 6) ) == (1, 2, 3, 4, 5, 6)
assert union_elements((11, 12, 13, 14),(13, 15, 16, 17) ) == (11, 12, 13, 14, 15, 16, 17)</s>