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nanobot/tests/webui/test_token_usage.py
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from __future__ import annotations
import json
from datetime import datetime, timedelta, timezone
from types import SimpleNamespace
import pytest
from nanobot.agent.hook import AgentHookContext
from nanobot.providers.base import LLMUsage
from nanobot.webui.token_usage import (
TokenUsageHook,
read_token_usage_state,
record_response_token_usage,
record_token_usage,
token_usage_payload,
write_token_usage_state,
)
def _write_state(tmp_path, days: dict) -> None:
state_dir = tmp_path / "webui"
state_dir.mkdir(parents=True, exist_ok=True)
(state_dir / "token-usage.json").write_text(
json.dumps({"schema_version": 2, "days": days}), encoding="utf-8"
)
def test_payload_tolerates_malformed_persisted_day_keys(tmp_path, monkeypatch) -> None:
"""Day keys that are not real dates must not break settings payloads.
normalize_token_usage_state only length-checks day keys, so a hand-edited
10-char key survives reads and atomic rewrites; token_usage_payload then
parsed it with an unguarded fromisoformat, failing every /api/settings and
/api/settings/usage request until the file was fixed by hand.
"""
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
_write_state(tmp_path, {
"not-a-dat3": {"total_tokens": 7, "requests": 1},
"2026-13-01": {"total_tokens": 9, "requests": 1},
"2026-06-02": {"total_tokens": 5, "requests": 1},
})
payload = token_usage_payload(
timezone_name="UTC",
now=datetime(2026, 6, 3, 12, 0, tzinfo=timezone.utc),
)
assert payload["total_tokens"] == 5
assert payload["total_tokens_30d"] == 5
assert payload["requests_30d"] == 1
assert payload["active_days_30d"] == 1
def test_record_scrubs_malformed_day_keys(tmp_path, monkeypatch) -> None:
"""Rewrites drop malformed day keys instead of persisting them forever."""
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
_write_state(tmp_path, {
"not-a-dat3": {"total_tokens": 7, "requests": 1},
"2026-06-02": {"total_tokens": 5, "requests": 1},
})
record_token_usage(
LLMUsage.reported(input_tokens=1, output_tokens=1),
timezone_name="UTC",
now=datetime(2026, 6, 3, 12, 0, tzinfo=timezone.utc),
)
raw = json.loads((tmp_path / "webui" / "token-usage.json").read_text(encoding="utf-8"))
assert "not-a-dat3" not in raw["days"]
assert "2026-06-02" in raw["days"]
assert "2026-06-03" in raw["days"]
def test_record_token_usage_aggregates_by_local_day(tmp_path, monkeypatch) -> None:
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
record_token_usage(
LLMUsage.reported(
input_tokens=100,
output_tokens=40,
cache_read_tokens=20,
),
timezone_name="Asia/Shanghai",
now=datetime(2026, 6, 2, 18, 0, tzinfo=timezone.utc),
)
record_token_usage(
LLMUsage.reported(input_tokens=10, output_tokens=5),
timezone_name="Asia/Shanghai",
now=datetime(2026, 6, 2, 19, 0, tzinfo=timezone.utc),
)
payload = token_usage_payload(
timezone_name="Asia/Shanghai",
now=datetime(2026, 6, 3, 12, 0, tzinfo=timezone.utc),
)
assert payload["total_tokens_30d"] == 155
assert payload["active_days_30d"] == 1
assert payload["requests_30d"] == 2
assert payload["days"] == [
{
"date": "2026-06-03",
"input_tokens": 110,
"output_tokens": 45,
"cache_read_tokens": 20,
"cache_write_tokens": 0,
"cache_read_observed_input_tokens": 100,
"cache_write_observed_input_tokens": 0,
"total_tokens": 155,
"reported_tokens": 155,
"estimated_tokens": 0,
"requests": 2,
"reported_requests": 2,
"estimated_requests": 0,
"sources": {
"user": {
"input_tokens": 110,
"output_tokens": 45,
"cache_read_tokens": 20,
"cache_write_tokens": 0,
"cache_read_observed_input_tokens": 100,
"cache_write_observed_input_tokens": 0,
"total_tokens": 155,
"reported_tokens": 155,
"estimated_tokens": 0,
"requests": 2,
"reported_requests": 2,
"estimated_requests": 0,
}
},
}
]
def test_cache_observation_denominators_distinguish_missing_from_zero(
tmp_path,
monkeypatch,
) -> None:
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
now = datetime(2026, 6, 3, tzinfo=timezone.utc)
record_token_usage(
LLMUsage.reported(input_tokens=100, output_tokens=10),
source="user",
now=now,
)
record_token_usage(
LLMUsage.reported(
input_tokens=40,
output_tokens=5,
cache_read_tokens=0,
cache_write_tokens=0,
),
source="dream",
now=now,
)
row = token_usage_payload(now=now)["days"][0]
assert row["cache_read_tokens"] == 0
assert row["cache_write_tokens"] == 0
assert row["cache_read_observed_input_tokens"] == 40
assert row["cache_write_observed_input_tokens"] == 40
assert row["sources"]["user"]["cache_read_observed_input_tokens"] == 0
assert row["sources"]["user"]["cache_write_observed_input_tokens"] == 0
assert row["sources"]["dream"]["cache_read_observed_input_tokens"] == 40
assert row["sources"]["dream"]["cache_write_observed_input_tokens"] == 40
def _retention_state(sources: tuple[str, ...], *, day_count: int = 400) -> dict:
start = datetime(2025, 1, 1, tzinfo=timezone.utc)
source_usage = {
"input_tokens": 100,
"output_tokens": 10,
"total_tokens": 110,
"reported_tokens": 110,
"requests": 1,
"reported_requests": 1,
}
days = {}
for offset in range(day_count):
day = (start + timedelta(days=offset)).date().isoformat()
days[day] = {
"input_tokens": 100 * len(sources),
"output_tokens": 10 * len(sources),
"total_tokens": 110 * len(sources),
"reported_tokens": 110 * len(sources),
"requests": len(sources),
"reported_requests": len(sources),
"sources": {source: dict(source_usage) for source in sources},
}
return {"schema_version": 2, "days": days}
def test_write_compact_state_keeps_400_days_with_two_sources(tmp_path, monkeypatch) -> None:
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
written = write_token_usage_state(_retention_state(("user", "api")))
persisted = (tmp_path / "webui" / "token-usage.json").read_bytes()
assert len(written["days"]) == 400
assert len(persisted) <= 512 * 1024
assert persisted.endswith(b"\n")
assert json.loads(persisted) == written
def test_write_prunes_only_oldest_days_to_fit_byte_budget(tmp_path, monkeypatch) -> None:
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
sources = ("user", "api", "cron", "dream", "system")
raw = _retention_state(sources)
all_dates = list(raw["days"])
written = write_token_usage_state(raw)
retained_dates = list(written["days"])
persisted = (tmp_path / "webui" / "token-usage.json").read_bytes()
assert 1 <= len(retained_dates) < len(all_dates)
assert retained_dates == all_dates[-len(retained_dates) :]
assert retained_dates[-1] == all_dates[-1]
assert all(set(row["sources"]) == set(sources) for row in written["days"].values())
assert len(persisted) <= 512 * 1024
assert read_token_usage_state() == written
def test_write_raises_when_latest_day_alone_exceeds_byte_budget(
tmp_path,
monkeypatch,
) -> None:
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
monkeypatch.setattr("nanobot.webui.token_usage._MAX_STATE_FILE_BYTES", 256)
with pytest.raises(ValueError, match="latest token usage day exceeds"):
write_token_usage_state(_retention_state(("user", "api"), day_count=1))
assert not (tmp_path / "webui" / "token-usage.json").exists()
def test_record_token_usage_skips_empty_usage(tmp_path, monkeypatch) -> None:
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
record_token_usage(LLMUsage.reported(input_tokens=0, output_tokens=0))
payload = token_usage_payload(now=datetime(2026, 6, 3, tzinfo=timezone.utc))
assert payload["days"] == []
assert payload["total_tokens_30d"] == 0
def test_record_token_usage_keeps_estimated_split(tmp_path, monkeypatch) -> None:
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
record_token_usage(
LLMUsage.estimated(input_tokens=100, output_tokens=25),
now=datetime(2026, 6, 3, tzinfo=timezone.utc),
)
payload = token_usage_payload(now=datetime(2026, 6, 3, tzinfo=timezone.utc))
assert payload["days"][0]["total_tokens"] == 125
assert payload["days"][0]["reported_tokens"] == 0
assert payload["days"][0]["estimated_tokens"] == 125
assert payload["days"][0]["estimated_requests"] == 1
def test_record_token_usage_keeps_source_breakdown(tmp_path, monkeypatch) -> None:
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
record_token_usage(
LLMUsage.reported(input_tokens=100, output_tokens=25, total_tokens=175),
source="user",
now=datetime(2026, 6, 3, tzinfo=timezone.utc),
)
record_token_usage(
LLMUsage.reported(input_tokens=20, output_tokens=5),
source="dream",
now=datetime(2026, 6, 3, tzinfo=timezone.utc),
)
payload = token_usage_payload(now=datetime(2026, 6, 3, tzinfo=timezone.utc))
row = payload["days"][0]
assert row["total_tokens"] == 200
assert row["sources"]["user"]["total_tokens"] == 175
assert row["sources"]["user"]["requests"] == 1
assert row["sources"]["dream"]["total_tokens"] == 25
assert row["sources"]["dream"]["requests"] == 1
def test_record_response_token_usage_uses_response_usage(tmp_path, monkeypatch) -> None:
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
monkeypatch.setattr("nanobot.webui.token_usage._local_day", lambda *_, **__: "2026-06-03")
record_response_token_usage(
SimpleNamespace(usage=LLMUsage.reported(input_tokens=20, output_tokens=5)),
source="dream",
)
payload = token_usage_payload(now=datetime(2026, 6, 3, tzinfo=timezone.utc))
assert payload["days"][0]["sources"]["dream"]["total_tokens"] == 25
@pytest.mark.asyncio
async def test_token_usage_hook_classifies_source_from_session_key(tmp_path, monkeypatch) -> None:
monkeypatch.setattr("nanobot.webui.token_usage.get_webui_dir", lambda: tmp_path / "webui")
monkeypatch.setattr("nanobot.webui.token_usage._local_day", lambda *_, **__: "2026-06-03")
hook = TokenUsageHook()
await hook.after_iteration(
AgentHookContext(
iteration=0,
messages=[],
session_key="cron:drink-water",
usage=LLMUsage.reported(input_tokens=10, output_tokens=5),
)
)
payload = token_usage_payload(now=datetime(2026, 6, 3, tzinfo=timezone.utc))
assert payload["days"][0]["sources"]["cron"]["total_tokens"] == 15