"""Tests for TTS adapter module."""

from __future__ import annotations

import pytest

from fusionagi.adapters.tts_adapter import StubTTSAdapter, audio_to_base64


class TestStubTTSAdapter:
    @pytest.mark.asyncio
    async def test_synthesize_returns_bytes(self) -> None:
        adapter = StubTTSAdapter()
        result = await adapter.synthesize("Hello world")
        assert result == b""

    @pytest.mark.asyncio
    async def test_synthesize_with_voice_id(self) -> None:
        adapter = StubTTSAdapter()
        result = await adapter.synthesize("Test", voice_id="test_voice")
        assert result is not None


class TestAudioToBase64:
    def test_encodes_bytes(self) -> None:
        result = audio_to_base64(b"hello")
        assert result == "aGVsbG8="

    def test_empty_bytes(self) -> None:
        result = audio_to_base64(b"")
        assert result == ""