TCMB MCP

"""Tests for TCMB client.""" from datetime import date from pathlib import Path import pytest import respx from httpx import Response from tcmb_mcp.core.config import Settings from tcmb_mcp.core.constants import TCMB_TODAY_URL, get_historical_url from tcmb_mcp.core.exceptions import TCMBAPIError, TCMBConnectionError from tcmb_mcp.services.tcmb_client import TCMBClient @pytest.fixture def settings() -> Settings: """Create test settings.""" return Settings( timeout=5, max_retries=2, retry_delay=0.1, request_delay=0.01, ) @pytest.fixture def sample_xml() -> str: """Load sample TCMB XML for testing.""" fixtures_dir = Path(__file__).parent.parent / "fixtures" xml_path = fixtures_dir / "sample_rates.xml" return xml_path.read_text(encoding="utf-8") class TestTCMBClient: """Tests for TCMBClient.""" @respx.mock async def test_get_today_rates(self, settings: Settings, sample_xml: str): """Test fetching today's rates.""" respx.get(TCMB_TODAY_URL).mock(return_value=Response(200, text=sample_xml)) async with TCMBClient(settings) as client: rates = await client.get_today_rates() assert rates.date == date(2024, 1, 15) assert len(rates.rates) == 5 assert rates.get_rate("USD") is not None @respx.mock async def test_get_historical_rates(self, settings: Settings, sample_xml: str): """Test fetching historical rates.""" target_date = date(2024, 1, 15) url = get_historical_url(target_date) respx.get(url).mock(return_value=Response(200, text=sample_xml)) async with TCMBClient(settings) as client: rates = await client.get_rates_for_date(target_date) assert rates.date == target_date assert rates.get_rate("EUR") is not None @respx.mock async def test_holiday_fallback(self, settings: Settings, sample_xml: str): """Test automatic fallback to previous business day on holidays.""" # Saturday (weekend) weekend_date = date(2024, 1, 13) # This is a Saturday friday_date = date(2024, 1, 12) # Weekend URL should 404, Friday should work respx.get(get_historical_url(weekend_date)).mock( return_value=Response(404) ) respx.get(get_historical_url(friday_date)).mock( return_value=Response(200, text=sample_xml) ) async with TCMBClient(settings) as client: rates = await client.get_rates_for_date(weekend_date, handle_holidays=True) # Should have warning about holiday assert rates.warning is not None assert "tatil" in rates.warning.lower() or "2024-01-13" in rates.warning @respx.mock async def test_retry_on_timeout(self, settings: Settings, sample_xml: str): """Test retry mechanism on timeout.""" # First request times out, second succeeds route = respx.get(TCMB_TODAY_URL) route.side_effect = [ Response(500), # First attempt fails Response(200, text=sample_xml), # Second attempt succeeds ] async with TCMBClient(settings) as client: rates = await client.get_today_rates() assert rates is not None assert route.call_count == 2 @respx.mock async def test_404_error(self, settings: Settings): """Test 404 error handling.""" target_date = date(2024, 1, 15) url = get_historical_url(target_date) respx.get(url).mock(return_value=Response(404)) async with TCMBClient(settings) as client: with pytest.raises(TCMBAPIError) as exc_info: await client.get_rates_for_date(target_date, handle_holidays=False) assert exc_info.value.status_code == 404 @respx.mock async def test_connection_error_after_retries(self, settings: Settings): """Test connection error after all retries fail.""" respx.get(TCMB_TODAY_URL).mock(return_value=Response(500)) async with TCMBClient(settings) as client: with pytest.raises(TCMBConnectionError): await client.get_today_rates() async def test_client_not_initialized(self, settings: Settings): """Test error when client used without context manager.""" client = TCMBClient(settings) with pytest.raises(TCMBConnectionError, match="not initialized"): await client.get_today_rates() class TestHistoricalUrl: """Tests for historical URL generation.""" def test_url_format(self): """Test correct URL format generation.""" target_date = date(2024, 1, 15) url = get_historical_url(target_date) assert url == "https://www.tcmb.gov.tr/kurlar/202401/15012024.xml" def test_url_format_single_digit_day(self): """Test URL format with single digit day.""" target_date = date(2024, 1, 5) url = get_historical_url(target_date) assert url == "https://www.tcmb.gov.tr/kurlar/202401/05012024.xml" def test_url_format_december(self): """Test URL format for December.""" target_date = date(2024, 12, 25) url = get_historical_url(target_date) assert url == "https://www.tcmb.gov.tr/kurlar/202412/25122024.xml"