58c30b7273
First sub-project of the "make contact feel real" arc (spec: docs/superpowers/specs/2026-07-23-possession-presentation-design.md). Direct Contact replies now feel like a spirit fighting through static to hold the channel rather than a plain chat bubble: - backend/app/possession.py: compute_stability(rarity, magnitude, rng) — a 0.05-0.98 score per reply (rarer entity + stronger triggering anomaly = cleaner signal), rng injectable for a later quantum-RNG source. - ws.py sends stability on reply_start; audio synthesis for that reply gets noise/bitcrush scaled by instability (1 - stability) via a new instability param on synthesize_spirit_voice — effects.py itself is untouched, only the params fed into it. - frontend/src/lib/possession.ts: renderPossessedText — pure, deterministic (tick-seeded, no Math.random) text corruption with self-correcting glitch bursts, wired into Transcript.tsx's streaming reply display. Stored transcript/reply text is unaffected — this is presentation only. 78/78 backend, 137/137 frontend tests passing.
119 lines
3.4 KiB
Python
119 lines
3.4 KiB
Python
import pytest
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import app.tts.piper as piper
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from app.tts.voices import VOICES
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@pytest.fixture(autouse=True)
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def _fake_piper_synth(monkeypatch):
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async def _fake_synthesize(self, text):
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return b"fake-wav-bytes"
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monkeypatch.setattr(piper.PiperTTS, "synthesize", _fake_synthesize)
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def _capture_effects_call(monkeypatch):
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calls = []
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def _fake_apply_effects(wav_bytes, **kwargs):
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calls.append(kwargs)
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return wav_bytes
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monkeypatch.setattr(piper, "apply_effects", _fake_apply_effects)
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return calls
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@pytest.mark.asyncio
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async def test_zero_instability_keeps_profile_defaults(monkeypatch):
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calls = _capture_effects_call(monkeypatch)
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voice = VOICES["lessac"]
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await piper.synthesize_spirit_voice("hello", voice, {"noise": 0.03, "bitcrush": 0})
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assert calls[0]["noise_level"] == pytest.approx(0.03)
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assert calls[0]["bitcrush_bits"] == 0
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@pytest.mark.asyncio
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async def test_instability_increases_noise_level(monkeypatch):
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calls = _capture_effects_call(monkeypatch)
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voice = VOICES["lessac"]
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await piper.synthesize_spirit_voice(
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"hello", voice, {"noise": 0.03, "bitcrush": 0}, instability=1.0
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)
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# Meaningfully louder than the clean baseline, but not blown out.
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assert calls[0]["noise_level"] > 0.03
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assert calls[0]["noise_level"] <= 0.1
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@pytest.mark.asyncio
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async def test_noise_level_scales_monotonically_with_instability(monkeypatch):
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voice = VOICES["lessac"]
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noise_levels = []
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for instability in (0.0, 0.25, 0.5, 0.75, 1.0):
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calls = _capture_effects_call(monkeypatch)
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await piper.synthesize_spirit_voice(
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"hello", voice, {"noise": 0.03, "bitcrush": 0}, instability=instability
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)
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noise_levels.append(calls[0]["noise_level"])
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assert noise_levels == sorted(noise_levels)
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assert noise_levels[0] < noise_levels[-1]
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@pytest.mark.asyncio
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async def test_bitcrush_stays_off_below_threshold(monkeypatch):
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voice = VOICES["lessac"]
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for instability in (0.0, 0.2, 0.5):
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calls = _capture_effects_call(monkeypatch)
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await piper.synthesize_spirit_voice(
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"hello", voice, {"noise": 0.03, "bitcrush": 0}, instability=instability
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)
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assert calls[0]["bitcrush_bits"] == 0
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@pytest.mark.asyncio
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async def test_bitcrush_kicks_in_above_threshold(monkeypatch):
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calls = _capture_effects_call(monkeypatch)
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voice = VOICES["lessac"]
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await piper.synthesize_spirit_voice(
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"hello", voice, {"noise": 0.03, "bitcrush": 0}, instability=1.0
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)
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assert calls[0]["bitcrush_bits"] > 0
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assert calls[0]["bitcrush_bits"] < 16
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@pytest.mark.asyncio
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async def test_instability_is_clamped_to_unit_range(monkeypatch):
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calls = _capture_effects_call(monkeypatch)
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voice = VOICES["lessac"]
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await piper.synthesize_spirit_voice(
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"hello", voice, {"noise": 0.03, "bitcrush": 0}, instability=5.0
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)
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clamped_high = calls[0]
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calls = _capture_effects_call(monkeypatch)
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await piper.synthesize_spirit_voice(
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"hello", voice, {"noise": 0.03, "bitcrush": 0}, instability=1.0
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)
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at_one = calls[0]
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assert clamped_high == at_one
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@pytest.mark.asyncio
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async def test_instability_adds_on_top_of_profile_bitcrush(monkeypatch):
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calls = _capture_effects_call(monkeypatch)
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voice = VOICES["lessac"]
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await piper.synthesize_spirit_voice(
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"hello", voice, {"noise": 0.03, "bitcrush": 4}, instability=1.0
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)
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assert calls[0]["bitcrush_bits"] > 4
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