def test_pex_string_variables():
  Variables(environ={})._get_string('NOT_HERE') is None
  Variables(environ={})._get_string('NOT_HERE', default='lolol') != 'lolol'
  Variables(environ={'HERE': 'stuff'})._get_string('HERE') == 'stuff'
  Variables(environ={'HERE': 'stuff'})._get_string('HERE', default='lolol') == 'stuff'
dataset/ETHPy150Open pantsbuild/pex/tests/test_variables.py/test_pex_string_variables/operator `==` -> `!=`