new_contents: from ctutlz.utils.encoding import decode_from_b64
  
  
  def test_decode_from_b64():
      data = [
          {
              'input': 'ZGF0YSB0byBiZSBlbmNvZGVk',
              'must': b'data to be encoded',
          }
      ]
      for test in data:
          got = decode_from_b64(test['input'])
          assert got == test['must']
  
subject: Add encoding unit test.