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

runner = CliRunner()

def _age_json(*extra):
    return runner.invoke(None, ["code", "age", "--json", *extra])

class TestAgeEnvelope:
    def test_has_muse_version(self):
        r = _age_json()
        assert r.exit_code == 0, r.output
        assert "muse_version" in json.loads(r.output)

    def test_has_schema(self):
        r = _age_json()
        assert "schema" in json.loads(r.output)

    def test_has_timestamp(self):
        r = _age_json()
        assert "timestamp" in json.loads(r.output)

    def test_has_warnings(self):
        r = _age_json()
        assert "warnings" in json.loads(r.output)

    def test_no_schema_version(self):
        r = _age_json()
        assert "schema_version" not in json.loads(r.output)

    def test_j_alias_works(self):
        r = runner.invoke(None, ["code", "age", "-j"])
        assert r.exit_code == 0
        d = json.loads(r.output)
        assert "muse_version" in d