"""Envelope tests for cherry-pick command."""
from __future__ import annotations
from collections.abc import Mapping
import json
import pytest
from tests.cli_test_helper import CliRunner

runner = CliRunner()

_FIELDS = ("muse_version", "schema", "timestamp", "warnings")


def _check(d: Mapping[str, object]) -> None:
    for f in _FIELDS:
        assert f in d, f"missing {f}"
    assert "schema_version" not in d


class TestCherryPickEnvelope:
    def test_cherry_pick_dry_run_has_envelope(self) -> None:
        r = runner.invoke(None, [
            "cherry-pick", "dev", "--dry-run", "--json",
        ])
        # exit code may be 0 (success) or 1 (conflict); both emit a JSON envelope
        assert r.output.strip(), "no output produced"
        _check(json.loads(r.output))