import egobox as egx
def test_gpx_help_exit_code_zero(capfd):
code = egx._run_gpx_cli(["--help"])
assert code == 0
out, err = capfd.readouterr()
help_text = f"{out}\n{err}"
assert "Fit GP surrogates from tabular data" in help_text
assert "predict" in help_text.lower()