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from datetime import datetime
from typing import List
import pytest
from fastapi import HTTPException
from fastapi.testclient import TestClient
from app.main import app, _resolve_transactions
from app.schemas import InsightRequest, Transaction
def _txn() -> Transaction:
return Transaction(
timestamp=datetime.utcnow(),
category="Travel",
amount=100.0,
currency="INR",
)
def test_resolve_transactions_handles_payload_list(monkeypatch):
payload = InsightRequest(user_id="abc", transactions=[_txn()])
result = _resolve_transactions(payload)
assert len(result) == 1
def test_resolve_transactions_requires_user_id_when_no_transactions():
payload = InsightRequest(user_id=None, transactions=[])
with pytest.raises(HTTPException):
_resolve_transactions(payload)
def test_resolve_transactions_fetches_from_db(monkeypatch):
payload = InsightRequest(user_id="6686280844fc8cbae596aa51", transactions=[])
def fake_fetch(user_id: str) -> List[Transaction]:
assert user_id == payload.user_id
return [_txn()]
monkeypatch.setattr("app.main.fetch_recent_transactions", fake_fetch)
result = _resolve_transactions(payload)
assert len(result) == 1
def test_insights_endpoint_requires_payload_when_empty(monkeypatch):
client = TestClient(app)
response = client.post("/insights", json={"user_id": None, "transactions": []})
assert response.status_code == 400
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