new_contents: from rwt import launch
  
  
  def test_with_path(tmpdir, capfd):
  	params = ['-c', 'import sys; print(sys.path)'	]
  	launch.with_path(str(tmpdir), params)
  	out, err = capfd.readouterr()
  	assert str(tmpdir) in out
  
subject: Add test for launch.with_path.