62 lines
2.2 KiB
Python
62 lines
2.2 KiB
Python
"""Unit: `cli.py start --backend=<name>` flag (issue #77).
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Asserts that the flag wins over the env var, that the env var is
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the fallback, and that the choices are pulled from the backend
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registry (so adding a backend lights up in argparse without code
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edits)."""
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from __future__ import annotations
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import argparse
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import os
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import unittest
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from unittest.mock import patch
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from bot_bottle.backend import known_backend_names
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class TestStartBackendFlag(unittest.TestCase):
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"""The flag is wired by `cmd_start`'s argparse and threaded
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through `prepare_with_preflight(backend_name=...)`. Rather than
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drive the whole start flow (which builds containers), we test
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the argparse shape and the resolution function separately."""
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def _build_parser(self):
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# Mirror the parser definition from `cmd_start` so this
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# test doesn't have to invoke the full command.
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parser = argparse.ArgumentParser(prog="cb start")
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parser.add_argument(
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"--backend",
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choices=known_backend_names(),
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default=None,
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)
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parser.add_argument("name")
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return parser
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def test_flag_recognized(self):
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args = self._build_parser().parse_args(["--backend=smolmachines", "researcher"])
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self.assertEqual("smolmachines", args.backend)
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self.assertEqual("researcher", args.name)
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def test_flag_default_none_means_env_or_docker(self):
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args = self._build_parser().parse_args(["researcher"])
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self.assertIsNone(args.backend)
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def test_invalid_backend_rejected_by_argparse(self):
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parser = self._build_parser()
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with self.assertRaises(SystemExit):
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parser.parse_args(["--backend=garbage", "researcher"])
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def test_resolution_priority_explicit_over_env(self):
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# Independent assertion that get_bottle_backend (where
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# `--backend` ultimately threads to) prefers the explicit
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# name over BOT_BOTTLE_BACKEND.
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from bot_bottle.backend import get_bottle_backend
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with patch.dict(os.environ, {"BOT_BOTTLE_BACKEND": "smolmachines"}):
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self.assertEqual("docker", get_bottle_backend("docker").name)
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if __name__ == "__main__":
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unittest.main()
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