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"""Tests for token_usage passthrough in the webapp report builder."""
from __future__ import annotations
import json
from pathlib import Path
from webapp.services.report_builder import build_report
def _write_minimal_run(run_dir: Path, token_usage: dict | None) -> None:
run_dir.mkdir(parents=True, exist_ok=True)
(run_dir / "scores.csv").write_text(
"sample_id,faithfulness\ns1,0.9\n", encoding="utf-8"
)
(run_dir / "summary.md").write_text("summary", encoding="utf-8")
metadata = {"run_id": run_dir.name}
if token_usage is not None:
metadata["token_usage"] = token_usage
(run_dir / "metadata.json").write_text(json.dumps(metadata), encoding="utf-8")
def test_build_report_passes_through_token_usage(tmp_path: Path) -> None:
run_dir = tmp_path / "run"
_write_minimal_run(
run_dir,
token_usage={"gpt-5": {"input_tokens": 100, "output_tokens": 50, "calls": 2}},
)
report = build_report(run_dir, ["faithfulness"])
assert report.token_usage == {
"gpt-5": {"input_tokens": 100, "output_tokens": 50, "calls": 2}
}
def test_build_report_defaults_token_usage_to_empty_dict(tmp_path: Path) -> None:
run_dir = tmp_path / "run"
_write_minimal_run(run_dir, token_usage=None)
report = build_report(run_dir, ["faithfulness"])
assert report.token_usage == {}
def test_build_report_early_return_branch_still_surfaces_token_usage(tmp_path: Path) -> None:
"""metrics=[] forces the early-return branch; token_usage must still surface."""
run_dir = tmp_path / "run"
_write_minimal_run(
run_dir,
token_usage={"gpt-5": {"input_tokens": 5, "output_tokens": 5, "calls": 1}},
)
report = build_report(run_dir, [])
assert report.token_usage == {"gpt-5": {"input_tokens": 5, "output_tokens": 5, "calls": 1}}