"""Envelope tests for ``muse code api-surface --json``."""
from __future__ import annotations
import json
from tests.cli_test_helper import CliRunner
runner = CliRunner()

class TestApiSurfaceEnvelope:
    def test_has_envelope_fields(self) -> None:
        r = runner.invoke(None, ["code", "api-surface", "--json"])
        assert r.exit_code == 0, r.output
        d = json.loads(r.output)
        for f in ("muse_version", "schema", "timestamp", "warnings"):
            assert f in d, f"missing {f}"
        assert "schema_version" not in d