#!/usr/bin/env python3
"""Require real, nonempty JUnit results; a build tool's zero exit is insufficient."""
import argparse
from pathlib import Path
import xml.etree.ElementTree as ET

parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument("directory", type=Path)
parser.add_argument("--minimum", type=int, required=True)
arguments = parser.parse_args()
cases = []
for path in arguments.directory.rglob("TEST*.xml"):
    cases.extend(ET.parse(path).getroot().iter("testcase"))
failed = sum(case.find("failure") is not None or case.find("error") is not None for case in cases)
skipped = sum(case.find("skipped") is not None for case in cases)
print(f"JUnit evidence: {len(cases)} tests, {failed} failures/errors, {skipped} skipped")
if len(cases) < arguments.minimum or failed or skipped:
    raise SystemExit("Incomplete or failing test evidence; do not report this run as passing.")