"""Unit tests for audio validation."""

import numpy as np
import pytest

from app.audio.validator import validate_audio_array


def test_empty_audio_fails():
    result = validate_audio_array(np.array([]), 16000)
    assert not result.valid


def test_silent_audio_fails():
    audio = np.zeros(16000 * 3, dtype=np.float32)
    result = validate_audio_array(audio, 16000)
    assert not result.valid


def test_valid_audio_passes():
    t = np.linspace(0, 3, 16000 * 3)
    audio = 0.3 * np.sin(2 * np.pi * 440 * t).astype(np.float32)
    result = validate_audio_array(audio, 16000)
    assert result.valid
    assert result.details["duration"] == pytest.approx(3.0, abs=0.1)