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f039f41 9ddbe3c 48e6368 9ddbe3c 48e6368 f039f41 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 | from __future__ import annotations
import json
from pathlib import Path
import pytest
from shiftedx_bench.context import ContextSpec, build_context_case, expand_context_config
from shiftedx_bench.boundary import probe_context_boundary
from shiftedx_bench.holdout import derive_holdout_config
class CharTokenizer:
fingerprint = "char-tokenizer-v1"
def encode(self, text: str) -> list[int]:
return [ord(value) for value in text]
def decode(self, token_ids: list[int]) -> str:
return "".join(chr(value) for value in token_ids)
def render_chat(self, messages):
return "".join(f"<{item['role']}>\n{item['content']}\n" for item in messages) + "<assistant>\n"
def token_offset(self, rendered_text: str, substring: str) -> int:
value = rendered_text.index(substring)
return len(self.encode(rendered_text[:value]))
def test_smoke_plan_has_expected_coverage():
root = Path(__file__).resolve().parents[1]
config = json.loads((root / "configs/context-smoke-v1.json").read_text())
specs = expand_context_config(config)
assert len(specs) == 19
assert {spec.target_tokens for spec in specs} >= {4096, 32768, 131072, 260096}
assert {spec.query_placement for spec in specs} == {"before", "after"}
def test_quant_gate_is_bounded_but_multidimensional():
root = Path(__file__).resolve().parents[1]
config = json.loads((root / "configs/context-quant-gate-v1.json").read_text())
specs = expand_context_config(config)
assert len(specs) == 15
assert sum(spec.target_tokens for spec in specs) == 372736
assert {spec.target_tokens for spec in specs} == {4096, 16384, 65536, 131072}
assert {spec.family for spec in specs} == {
"single_key", "binding", "latest_record", "multi_hop", "semantic", "state_tracking"
}
assert {spec.query_placement for spec in specs} == {"before", "after"}
def test_max_window_sentinel_is_explicitly_separate():
root = Path(__file__).resolve().parents[1]
config = json.loads((root / "configs/context-max-window-v1.json").read_text())
specs = expand_context_config(config)
assert len(specs) == 1
assert specs[0].target_tokens == 260096
assert specs[0].family == "single_key"
@pytest.mark.parametrize(
"family",
["single_key", "binding", "latest_record", "multi_hop", "semantic", "state_tracking"],
)
@pytest.mark.parametrize("position", [0.01, 0.5, 0.99])
def test_context_is_exact_and_positioned(family: str, position: float):
spec = ContextSpec("suite", "matrix", family, 12000, position, 173)
case = build_context_case(spec, CharTokenizer())
assert case.metadata["actual_rendered_tokens"] == 12000
assert abs(case.metadata["actual_primary_position"] - position) <= 0.003
assert set(case.expected) >= {"start_sentinel", "end_sentinel", "record"}
def test_rejects_duplicate_identifiers():
config = {
"suite_id": "x",
"matrices": [{
"name": "m", "families": ["single_key", "single_key"], "lengths": [4096],
"positions": [0.5], "seeds": [1]
}],
}
with pytest.raises(ValueError, match="duplicate"):
expand_context_config(config)
def test_holdout_derivation_is_stable_and_release_specific():
template = {
"suite_id": "x", "context_window": 8192, "reserved_output_tokens": 512,
"matrices": [{"name":"m","families":["single_key"],"lengths":[4096],"positions":[.5],"seeds":[1,2]}],
}
first = derive_holdout_config(template, "a sufficiently long private key", "r1")
second = derive_holdout_config(template, "a sufficiently long private key", "r1")
third = derive_holdout_config(template, "a sufficiently long private key", "r2")
assert first == second
assert first["matrices"][0]["seeds"] != third["matrices"][0]["seeds"]
assert "private key" not in str(first)
def test_rejects_prompt_beyond_reserved_output_budget():
config = {
"suite_id":"x", "context_window":4096, "reserved_output_tokens":512,
"matrices":[{"name":"m","families":["single_key"],"lengths":[3585],"positions":[.5],"seeds":[1]}],
}
with pytest.raises(ValueError, match="exceeds"):
expand_context_config(config)
def test_boundary_probe_requires_explicit_server_rejection():
class RejectingClient:
def complete(self, payload, stream=False):
raise RuntimeError("HTTP 400: context window exceeded")
result = probe_context_boundary(
client=RejectingClient(), tokenizer=CharTokenizer(), model="m",
context_window=4096, reserved_output_tokens=512,
)
assert result["passed"]
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