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| 1 | +"""Tests for the extended (9-dim) style fingerprint. |
| 2 | + |
| 3 | +The extended path requires the ``style`` extra (spaCy + textstat). |
| 4 | +We don't gate the test on the extra being installed — instead we test |
| 5 | +that: |
| 6 | + |
| 7 | +1. ``extended=False`` always returns 6 dims (backward-compat with the |
| 8 | + v1 fingerprint contract). |
| 9 | +2. ``extended=True`` returns 9 dims **when** ``_has_style_extra()`` is |
| 10 | + true; the test patches the extra-detection to simulate both states. |
| 11 | +3. The probe's ``extended="on"`` SKIPs cleanly when the extra is |
| 12 | + missing rather than crashing. |
| 13 | +""" |
| 14 | + |
| 15 | +from __future__ import annotations |
| 16 | + |
| 17 | +from unittest.mock import patch |
| 18 | + |
| 19 | +import numpy as np |
| 20 | + |
| 21 | +from dlm_sway.backends.dummy import DummyDifferentialBackend, DummyResponses |
| 22 | +from dlm_sway.core.result import Verdict |
| 23 | +from dlm_sway.probes.base import RunContext, build_probe |
| 24 | +from dlm_sway.probes.style_fingerprint import ( |
| 25 | + FINGERPRINT_SCHEMA_VERSION, |
| 26 | + fingerprint, |
| 27 | +) |
| 28 | + |
| 29 | + |
| 30 | +def _backend_with_generations(prompts: list[str]) -> DummyDifferentialBackend: |
| 31 | + base = {p: f"base {p} response with several words and a period." for p in prompts} |
| 32 | + ft = {p: f"ft {p} response, longer, with extra punctuation, more words." for p in prompts} |
| 33 | + return DummyDifferentialBackend( |
| 34 | + base=DummyResponses(generations=base), |
| 35 | + ft=DummyResponses(generations=ft), |
| 36 | + ) |
| 37 | + |
| 38 | + |
| 39 | +class TestFingerprintFunction: |
| 40 | + def test_default_is_6_dim(self) -> None: |
| 41 | + fp = fingerprint("Hello there. This is a test sentence. Another one follows.") |
| 42 | + assert fp.shape == (6,) |
| 43 | + |
| 44 | + def test_empty_text_returns_zeros_at_requested_dim(self) -> None: |
| 45 | + assert fingerprint("", extended=False).shape == (6,) |
| 46 | + assert fingerprint("", extended=True).shape == (9,) |
| 47 | + |
| 48 | + def test_extended_falls_back_when_extra_missing(self) -> None: |
| 49 | + with patch("dlm_sway.probes.style_fingerprint._extended_fingerprint", return_value=None): |
| 50 | + fp = fingerprint("Some text. Another sentence.", extended=True) |
| 51 | + assert fp.shape == (6,) |
| 52 | + |
| 53 | + |
| 54 | +class TestProbeExtendedOnRequiresExtra: |
| 55 | + def test_extended_on_skips_without_extra(self) -> None: |
| 56 | + prompts = ["p1"] |
| 57 | + backend = _backend_with_generations(prompts) |
| 58 | + probe, spec = build_probe( |
| 59 | + { |
| 60 | + "name": "sf", |
| 61 | + "kind": "style_fingerprint", |
| 62 | + "prompts": prompts, |
| 63 | + "doc_reference": "The reference document. Has some sentences. Three of them.", |
| 64 | + "extended": "on", |
| 65 | + } |
| 66 | + ) |
| 67 | + ctx = RunContext(backend=backend) |
| 68 | + with patch("dlm_sway.probes.style_fingerprint._has_style_extra", return_value=False): |
| 69 | + result = probe.run(spec, ctx) |
| 70 | + assert result.verdict == Verdict.SKIP |
| 71 | + assert "style" in result.message.lower() |
| 72 | + |
| 73 | + |
| 74 | +class TestProbeExtendedAuto: |
| 75 | + def test_auto_off_when_extra_missing(self) -> None: |
| 76 | + prompts = ["p1"] |
| 77 | + backend = _backend_with_generations(prompts) |
| 78 | + probe, spec = build_probe( |
| 79 | + { |
| 80 | + "name": "sf", |
| 81 | + "kind": "style_fingerprint", |
| 82 | + "prompts": prompts, |
| 83 | + "doc_reference": "The reference document. Has some sentences.", |
| 84 | + "extended": "auto", |
| 85 | + } |
| 86 | + ) |
| 87 | + ctx = RunContext(backend=backend) |
| 88 | + with patch("dlm_sway.probes.style_fingerprint._has_style_extra", return_value=False): |
| 89 | + result = probe.run(spec, ctx) |
| 90 | + assert result.evidence.get("extended") is False |
| 91 | + assert len(result.evidence["base_fp"]) == 6 |
| 92 | + assert result.evidence["schema_version"] == FINGERPRINT_SCHEMA_VERSION |
| 93 | + |
| 94 | + |
| 95 | +class TestExtendedProducesNineDimWhenSimulated: |
| 96 | + def test_extended_path_returns_9_dim(self) -> None: |
| 97 | + """Patch ``_extended_fingerprint`` to return a 9-vector and confirm |
| 98 | + ``fingerprint(..., extended=True)`` passes it through unchanged.""" |
| 99 | + nine = np.arange(9, dtype=np.float64) / 9.0 |
| 100 | + with patch( |
| 101 | + "dlm_sway.probes.style_fingerprint._extended_fingerprint", |
| 102 | + return_value=nine, |
| 103 | + ): |
| 104 | + fp = fingerprint("Some text. Another sentence.", extended=True) |
| 105 | + assert fp.shape == (9,) |
| 106 | + np.testing.assert_array_equal(fp, nine) |
