"""Envelope tests for commit 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 TestCommitEnvelope:
    def test_commit_dry_run_has_envelope(self) -> None:
        r = runner.invoke(None, ["commit", "-m", "test", "--dry-run", "--json"])
        # May exit 0 (changes) or 1 (clean), both should emit an envelope
        d = json.loads(r.output)
        _check(d)