"""
Tests for the canonical Voice Assistant audio contract.

Purpose:
    Verify that the Voice Core exposes the expected provider-independent
    canonical audio format.
"""

import pytest
from pydantic import ValidationError

from voice_assistant.audio.models import (
    AudioFormat,
    CANONICAL_AUDIO_FORMAT,
)


def test_canonical_audio_format():
    assert CANONICAL_AUDIO_FORMAT.encoding == "pcm_s16le"
    assert CANONICAL_AUDIO_FORMAT.sample_rate == 16000
    assert CANONICAL_AUDIO_FORMAT.channels == 1


def test_audio_format_rejects_unsupported_encoding():
    with pytest.raises(ValidationError):
        AudioFormat(
            encoding="mp3",
            sample_rate=16000,
            channels=1,
        )