test_cli.py

import subprocess
import importlib
from SALib.util import avail_approaches


def test_cli_usage():
    cmd = ["salib"]
    try:
        out = subprocess.check_output(
            cmd, stderr=subprocess.STDOUT, shell=True, universal_newlines=True
        )
    except subprocess.CalledProcessError as e:
        raise RuntimeError(f"Call failed:\n{e}")
    else:
        # if no error raised, check the returned string
        assert (
            len(out) > 0 and "usage" in out.lower()
        ), "Incorrect message returned from utility"


def test_cli_avail_methods():
    method_types = ["sample", "analyze"]

    for method in method_types:
        module = importlib.import_module(f"SALib.{method}")
        actions = avail_approaches(module)
        for act in actions:
            approach = importlib.import_module(f"SALib.{method}.{act}")

            # Just try to access the functions - raises error on failure
            approach.cli_parse
            approach.cli_action


if __name__ == "__main__":
    test_cli_usage()
    test_cli_avail_methods()