| 1 | """Tests for :mod:`dlm_sway.probes.preference_flip`.""" |
| 2 | |
| 3 | from __future__ import annotations |
| 4 | |
| 5 | from dlm_sway.backends.dummy import DummyDifferentialBackend, DummyResponses |
| 6 | from dlm_sway.core.result import Verdict |
| 7 | from dlm_sway.core.sections import Section, SectionPreference |
| 8 | from dlm_sway.probes.base import RunContext, build_probe |
| 9 | |
| 10 | |
| 11 | def _backend(pairs: list[tuple[str, str, str, float, float]]) -> DummyDifferentialBackend: |
| 12 | """``pairs`` = list of (prompt, chosen, rejected, base_margin, ft_margin). |
| 13 | |
| 14 | We distribute the margin half to the chosen and half (negative) to |
| 15 | the rejected, which is enough to make logprob_of(chosen)-logprob_of(rejected) |
| 16 | equal the requested margin. |
| 17 | """ |
| 18 | base_lp: dict[tuple[str, str], float] = {} |
| 19 | ft_lp: dict[tuple[str, str], float] = {} |
| 20 | for prompt, chosen, rejected, base_m, ft_m in pairs: |
| 21 | base_lp[(prompt, chosen)] = base_m / 2 |
| 22 | base_lp[(prompt, rejected)] = -base_m / 2 |
| 23 | ft_lp[(prompt, chosen)] = ft_m / 2 |
| 24 | ft_lp[(prompt, rejected)] = -ft_m / 2 |
| 25 | return DummyDifferentialBackend( |
| 26 | base=DummyResponses(logprobs=base_lp), |
| 27 | ft=DummyResponses(logprobs=ft_lp), |
| 28 | ) |
| 29 | |
| 30 | |
| 31 | def test_pass_when_base_wrong_flipped() -> None: |
| 32 | backend = _backend( |
| 33 | [ |
| 34 | ("p1", "good1", "bad1", -2.0, 2.0), # base wrong, ft flips |
| 35 | ("p2", "good2", "bad2", -1.5, 1.0), # base wrong, ft flips |
| 36 | ("p3", "good3", "bad3", -0.5, 0.8), # base wrong, ft flips |
| 37 | ("p4", "good4", "bad4", 1.0, 2.0), # base already right (no contribution) |
| 38 | ] |
| 39 | ) |
| 40 | triples = [ |
| 41 | {"prompt": p, "chosen": c, "rejected": r} |
| 42 | for (p, c, r, _, _) in [ |
| 43 | ("p1", "good1", "bad1", 0, 0), |
| 44 | ("p2", "good2", "bad2", 0, 0), |
| 45 | ("p3", "good3", "bad3", 0, 0), |
| 46 | ("p4", "good4", "bad4", 0, 0), |
| 47 | ] |
| 48 | ] |
| 49 | probe, spec = build_probe( |
| 50 | { |
| 51 | "name": "pf", |
| 52 | "kind": "preference_flip", |
| 53 | "triples": triples, |
| 54 | "assert_flip_rate_gte": 0.7, |
| 55 | "min_triples_for_decision": 3, |
| 56 | } |
| 57 | ) |
| 58 | ctx = RunContext(backend=backend) |
| 59 | result = probe.run(spec, ctx) |
| 60 | assert result.verdict == Verdict.PASS |
| 61 | assert result.raw == 1.0 # 3/3 flipped |
| 62 | |
| 63 | |
| 64 | def test_fail_when_base_wrong_not_flipped() -> None: |
| 65 | backend = _backend( |
| 66 | [ |
| 67 | ("p1", "good1", "bad1", -2.0, -1.5), # base wrong, ft still wrong |
| 68 | ("p2", "good2", "bad2", -1.5, -1.0), # base wrong, ft still wrong |
| 69 | ("p3", "good3", "bad3", -0.5, 0.8), # base wrong, ft flips |
| 70 | ] |
| 71 | ) |
| 72 | triples = [ |
| 73 | {"prompt": p, "chosen": c, "rejected": r} |
| 74 | for p, c, r in [ |
| 75 | ("p1", "good1", "bad1"), |
| 76 | ("p2", "good2", "bad2"), |
| 77 | ("p3", "good3", "bad3"), |
| 78 | ] |
| 79 | ] |
| 80 | probe, spec = build_probe( |
| 81 | { |
| 82 | "name": "pf", |
| 83 | "kind": "preference_flip", |
| 84 | "triples": triples, |
| 85 | "assert_flip_rate_gte": 0.7, |
| 86 | "min_triples_for_decision": 3, |
| 87 | } |
| 88 | ) |
| 89 | ctx = RunContext(backend=backend) |
| 90 | result = probe.run(spec, ctx) |
| 91 | assert result.verdict == Verdict.FAIL |
| 92 | assert result.raw is not None |
| 93 | assert result.raw < 0.7 |
| 94 | |
| 95 | |
| 96 | def test_skip_when_no_triples_anywhere() -> None: |
| 97 | probe, spec = build_probe({"name": "pf", "kind": "preference_flip"}) |
| 98 | backend = _backend([]) |
| 99 | ctx = RunContext(backend=backend) |
| 100 | result = probe.run(spec, ctx) |
| 101 | assert result.verdict == Verdict.SKIP |
| 102 | |
| 103 | |
| 104 | def test_warn_when_too_few_base_wrong() -> None: |
| 105 | backend = _backend( |
| 106 | [ |
| 107 | ("p1", "good1", "bad1", 1.0, 2.0), # base right |
| 108 | ("p2", "good2", "bad2", 0.5, 1.0), # base right |
| 109 | ("p3", "good3", "bad3", -0.5, 0.5), # base wrong |
| 110 | ] |
| 111 | ) |
| 112 | triples = [ |
| 113 | {"prompt": p, "chosen": c, "rejected": r} |
| 114 | for p, c, r in [ |
| 115 | ("p1", "good1", "bad1"), |
| 116 | ("p2", "good2", "bad2"), |
| 117 | ("p3", "good3", "bad3"), |
| 118 | ] |
| 119 | ] |
| 120 | probe, spec = build_probe( |
| 121 | { |
| 122 | "name": "pf", |
| 123 | "kind": "preference_flip", |
| 124 | "triples": triples, |
| 125 | "min_triples_for_decision": 3, |
| 126 | } |
| 127 | ) |
| 128 | ctx = RunContext(backend=backend) |
| 129 | result = probe.run(spec, ctx) |
| 130 | assert result.verdict == Verdict.WARN |
| 131 | |
| 132 | |
| 133 | def test_triples_pulled_from_sections() -> None: |
| 134 | pref_section = Section( |
| 135 | id="p1", |
| 136 | kind="preference", |
| 137 | content="...", |
| 138 | preferences=( |
| 139 | SectionPreference(prompt="q1", chosen="good", rejected="bad"), |
| 140 | SectionPreference(prompt="q2", chosen="good2", rejected="bad2"), |
| 141 | SectionPreference(prompt="q3", chosen="good3", rejected="bad3"), |
| 142 | ), |
| 143 | ) |
| 144 | backend = _backend( |
| 145 | [ |
| 146 | ("q1", "good", "bad", -1.0, 1.0), |
| 147 | ("q2", "good2", "bad2", -1.0, 1.0), |
| 148 | ("q3", "good3", "bad3", -1.0, 1.0), |
| 149 | ] |
| 150 | ) |
| 151 | probe, spec = build_probe( |
| 152 | { |
| 153 | "name": "pf", |
| 154 | "kind": "preference_flip", |
| 155 | "assert_flip_rate_gte": 0.7, |
| 156 | "min_triples_for_decision": 3, |
| 157 | } |
| 158 | ) |
| 159 | ctx = RunContext(backend=backend, sections=(pref_section,)) |
| 160 | result = probe.run(spec, ctx) |
| 161 | assert result.verdict == Verdict.PASS |