"""Envelope tests for commit-tree 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 TestCommitTreeEnvelope:
    def test_commit_tree_has_envelope(self) -> None:
        # Get the HEAD snapshot ID from muse log
        log_r = runner.invoke(None, ["log", "--json"])
        assert log_r.exit_code == 0, log_r.output
        log_d = json.loads(log_r.output)
        snapshot_id = log_d["commits"][0]["snapshot_id"]

        r = runner.invoke(None, ["commit-tree", "--snapshot", snapshot_id, "-m", "test", "--json"])
        assert r.exit_code == 0, r.output
        _check(json.loads(r.output))