Merge branch 'main' of https://gitea.shaguabijia.com/WonderableAI/shaguabijia-app-server into feat/wechat-login
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guke
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"""LLM 调用成本计算 compute_llm_cost:按模型分桶累加 token × 单价;error/无 usage 跳过。"""
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from __future__ import annotations
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from app.services.llm_cost import compute_llm_cost
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_PRICE = {
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"per_model": {"qwen3.5-flash": {"input_per_1m": 0.8, "output_per_1m": 2.0}},
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"default": {"input_per_1m": 3.0, "output_per_1m": 15.0},
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}
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def test_sums_per_model_single_model():
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# 真实样本:4 次 qwen3.5-flash;Σprompt=6888、Σcompletion=337
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calls = [
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{"model": "qwen3.5-flash", "error": None, "usage": {"prompt_tokens": 1512, "completion_tokens": 22}},
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{"model": "qwen3.5-flash", "error": None, "usage": {"prompt_tokens": 2111, "completion_tokens": 160}},
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{"model": "qwen3.5-flash", "error": None, "usage": {"prompt_tokens": 1940, "completion_tokens": 142}},
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{"model": "qwen3.5-flash", "error": None, "usage": {"prompt_tokens": 1325, "completion_tokens": 13}},
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]
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cost, snapshot = compute_llm_cost(calls, _PRICE)
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# 6888/1e6*0.8 + 337/1e6*2.0 = 0.0055104 + 0.000674 = 0.0061844 → round(6)
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assert cost == 0.006184
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assert snapshot == {
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"mode": "per_model",
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"prices": {
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"qwen3.5-flash": {"input_per_1m": 0.8, "output_per_1m": 2.0, "_source": "per_model"},
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},
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}
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def test_multi_model_prices_each_bucket_separately():
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calls = [
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{"model": "qwen3.5-flash", "error": None, "usage": {"prompt_tokens": 1_000_000, "completion_tokens": 0}},
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{"model": "gpt-x", "error": None, "usage": {"prompt_tokens": 0, "completion_tokens": 1_000_000}},
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]
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price = {
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"per_model": {
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"qwen3.5-flash": {"input_per_1m": 0.8, "output_per_1m": 2.0},
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"gpt-x": {"input_per_1m": 10.0, "output_per_1m": 30.0},
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},
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"default": {"input_per_1m": 3.0, "output_per_1m": 15.0},
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}
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cost, snap = compute_llm_cost(calls, price)
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assert cost == 30.8 # qwen 1M入×0.8=0.8 + gpt-x 1M出×30=30.0
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assert set(snap["prices"]) == {"qwen3.5-flash", "gpt-x"}
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def test_unknown_model_falls_back_to_default():
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calls = [{"model": "mystery", "error": None, "usage": {"prompt_tokens": 1_000_000, "completion_tokens": 0}}]
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price = {"per_model": {}, "default": {"input_per_1m": 3.0, "output_per_1m": 15.0}}
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cost, snap = compute_llm_cost(calls, price)
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assert cost == 3.0
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assert snap["prices"]["mystery"]["_source"] == "default"
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def test_unpriced_model_marked_and_zero_cost():
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calls = [{"model": "mystery", "error": None, "usage": {"prompt_tokens": 1_000_000, "completion_tokens": 999}}]
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cost, snap = compute_llm_cost(calls, {"per_model": {}}) # 无 default
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assert cost == 0.0
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assert snap["prices"]["mystery"]["unpriced"] is True
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def test_error_and_missing_usage_calls_skipped():
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calls = [
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{"model": "qwen3.5-flash", "error": "boom", "usage": {"prompt_tokens": 9_999_999, "completion_tokens": 9_999_999}},
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{"model": "qwen3.5-flash", "error": None, "usage": None}, # 无 usage
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{"model": "qwen3.5-flash", "error": None, "usage": {"prompt_tokens": 1_000_000, "completion_tokens": 0}},
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]
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cost, _ = compute_llm_cost(calls, _PRICE)
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assert cost == 0.8 # 只有第 3 条计入
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def test_empty_or_all_error_returns_none():
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assert compute_llm_cost([], _PRICE) == (None, None)
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assert compute_llm_cost(None, _PRICE) == (None, None)
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all_error = [{"model": "x", "error": "boom", "usage": {"prompt_tokens": 100, "completion_tokens": 100}}]
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assert compute_llm_cost(all_error, _PRICE) == (None, None)
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def test_malformed_price_entry_is_treated_as_unpriced_not_raised():
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# 手改配置页可能存出残缺/非法单价(缺 output_per_1m、非 dict);不能抛异常连累 token 回填。
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calls = [
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{"model": "bad-a", "error": None, "usage": {"prompt_tokens": 1_000_000, "completion_tokens": 5}},
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{"model": "bad-b", "error": None, "usage": {"prompt_tokens": 1_000_000, "completion_tokens": 5}},
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{"model": "ok", "error": None, "usage": {"prompt_tokens": 1_000_000, "completion_tokens": 0}},
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]
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price = {
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"per_model": {
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"bad-a": {"input_per_1m": 0.8}, # 缺 output_per_1m
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"bad-b": 5, # 非 dict
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"ok": {"input_per_1m": 3.0, "output_per_1m": 15.0},
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},
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}
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cost, snap = compute_llm_cost(calls, price) # 不得抛异常
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assert cost == 3.0 # 只有 ok(1M 入 × 3.0)计入;两个残缺项按 unpriced
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assert snap["prices"]["bad-a"].get("unpriced") is True
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assert snap["prices"]["bad-b"].get("unpriced") is True
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def test_get_llm_prices_falls_back_to_default_then_uses_override():
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from app.db.session import SessionLocal
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from app.models.app_config import AppConfig
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from app.repositories import app_config
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from app.services.llm_cost import get_llm_prices
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db = SessionLocal()
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try:
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# 无 override → CONFIG_DEFS 默认(含 per_model / default)
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prices = get_llm_prices(db)
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assert "per_model" in prices and "default" in prices
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# 有 override → 用 DB 值
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app_config.set_value(
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db, "llm_token_price",
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{"per_model": {"m": {"input_per_1m": 1.0, "output_per_1m": 2.0}},
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"default": {"input_per_1m": 0.0, "output_per_1m": 0.0}},
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admin_id=1,
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)
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assert get_llm_prices(db)["per_model"]["m"]["input_per_1m"] == 1.0
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finally:
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row = db.get(AppConfig, "llm_token_price")
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if row is not None:
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db.delete(row)
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db.commit()
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db.close()
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def test_backfill_llm_calls_stores_cost_and_snapshot(monkeypatch):
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from datetime import UTC, datetime
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from app.api.v1 import compare_record
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from app.db.session import SessionLocal
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from app.models.app_config import AppConfig
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from app.models.comparison import ComparisonRecord
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from app.repositories import app_config
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sample = [
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{"model": "qwen3.5-flash", "error": None, "usage": {"prompt_tokens": 1512, "completion_tokens": 22}},
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{"model": "qwen3.5-flash", "error": None, "usage": {"prompt_tokens": 2111, "completion_tokens": 160}},
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{"model": "qwen3.5-flash", "error": None, "usage": {"prompt_tokens": 1940, "completion_tokens": 142}},
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{"model": "qwen3.5-flash", "error": None, "usage": {"prompt_tokens": 1325, "completion_tokens": 13}},
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]
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monkeypatch.setattr(compare_record, "fetch_llm_calls", lambda trace_id: sample)
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db = SessionLocal()
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try:
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app_config.set_value(
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db, "llm_token_price",
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{"per_model": {"qwen3.5-flash": {"input_per_1m": 0.8, "output_per_1m": 2.0}},
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"default": {"input_per_1m": 3.0, "output_per_1m": 15.0}},
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admin_id=1,
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)
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rec = ComparisonRecord(
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trace_id="llmcost-bf-1", status="success",
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created_at=datetime.now(UTC).replace(tzinfo=None),
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)
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db.add(rec)
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db.commit()
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rid = rec.id
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finally:
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db.close()
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compare_record._backfill_llm_calls(rid, "llmcost-bf-1") # 独立 session 内回填
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db = SessionLocal()
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try:
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rec = db.get(ComparisonRecord, rid)
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assert rec.llm_cost_yuan == 0.006184
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assert rec.llm_price_snapshot["prices"]["qwen3.5-flash"]["input_per_1m"] == 0.8
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assert rec.input_tokens == 6888 # 现有 token 派生仍在
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finally:
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db.delete(db.get(ComparisonRecord, rid))
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row = db.get(AppConfig, "llm_token_price")
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if row is not None:
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db.delete(row)
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db.commit()
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db.close()
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def test_admin_detail_schema_exposes_llm_cost_fields():
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from app.admin.schemas.comparison import AdminComparisonDetail
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fields = AdminComparisonDetail.model_fields
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assert "llm_cost_yuan" in fields
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assert "llm_price_snapshot" in fields
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