"""Envelope tests for ``muse annotate --json``."""
from __future__ import annotations
import json
import pytest
from tests.cli_test_helper import CliRunner

runner = CliRunner()

class TestAnnotateEnvelope:
    def test_show_has_envelope(self) -> None:
        # annotate with no mutation flags = show mode
        r = runner.invoke(None, ["annotate", "--json"])
        assert r.exit_code == 0, r.output
        d = json.loads(r.output)
        for field in ("muse_version", "schema", "timestamp", "warnings"):
            assert field in d, f"missing {field}"
        assert "schema_version" not in d