def METHOD_NAME(tmp_path):
    """
    get_rsa_pub_key raises InvalidKeyError when encoutering a bad key
    """
    key_path = str(tmp_path / "key")
    with salt.utils.files.fopen(key_path, "w") as fp:
        fp.write("")
    with pytest.raises(salt.crypt.InvalidKeyError):
        salt.crypt.get_rsa_pub_key(key_path)