import pytest
from mcp_server.cache.ttl_cache import TTLCache
from mcp_server.providers.models import NormalizedOptionsContract
from mcp_server.providers.yahoo_finance import YahooFinanceClient
from mcp_server.services.base import ServiceContext
from mcp_server.services.options_service import OptionsService
from mcp_server.utils.rate_limit import RateLimiterRegistry
def test_options_iv_summary(monkeypatch) -> None:
yahoo = YahooFinanceClient()
monkeypatch.setattr(
yahoo,
"get_options_chain",
lambda symbol: [
NormalizedOptionsContract(symbol=symbol, expiration="1", strike=100, call_put="call", implied_volatility=0.2),
NormalizedOptionsContract(symbol=symbol, expiration="1", strike=105, call_put="put", implied_volatility=0.4),
],
)
service = OptionsService(
ServiceContext(providers={"yahoo": yahoo}, cache=TTLCache(), rate_limiter=RateLimiterRegistry(0.0))
)
result = service.get_iv_summary("AAPL")
assert result.data is not None
assert result.data["avg_iv"] == pytest.approx(0.3)
