feat: establish voice assistant V1 baseline

tests/test_tts.py

@@ -0,0 +1,39 @@
+import pytest
+
+from voice_assistant.stt.mock import MockSTTAdapter
+
+
+@pytest.mark.anyio
+async def test_mock_stt_lifecycle():
+    stt = MockSTTAdapter()
+
+    await stt.start_session()
+
+    await stt.send_audio(b"\x00\x00" * 160)
+
+    await stt.emit_partial("eu gostaria de saber")
+    await stt.emit_final(
+        "eu gostaria de saber o horário de funcionamento"
+    )
+
+    await stt.stop_session()
+
+    events = [event async for event in stt.events()]
+
+    assert len(events) == 2
+
+    assert events[0].type == "partial"
+    assert events[0].text == "eu gostaria de saber"
+
+    assert events[1].type == "final"
+    assert events[1].text == (
+        "eu gostaria de saber o horário de funcionamento"
+    )
+
+
+@pytest.mark.anyio
+async def test_mock_stt_rejects_audio_before_start():
+    stt = MockSTTAdapter()
+
+    with pytest.raises(RuntimeError, match="has not been started"):
+        await stt.send_audio(b"\x00\x00")