71ac59794e
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Root cause analysis revealed 3 critical issues causing EGW00201 errors: 1. **Hash key bypass** - _get_hash_key() made API calls without rate limiting - Every order made 2 API calls but only 1 was rate-limited - Fixed by adding rate_limiter.acquire() to _get_hash_key() 2. **Scanner concurrent burst** - scan_market() launched all stocks via asyncio.gather - All tasks queued simultaneously creating burst pressure - Fixed by adding Semaphore(1) for fully serialized scanning 3. **RPS too aggressive** - 5.0 RPS exceeded KIS API's real ~2 RPS limit - Lowered to 2.0 RPS (500ms interval) for maximum safety Changes: - src/broker/kis_api.py: Add rate limiter to _get_hash_key() - src/analysis/scanner.py: Add semaphore-based concurrency control - New max_concurrent_scans parameter (default 1, fully serialized) - Wrap scan_stock calls with semaphore in _bounded_scan() - Remove ineffective asyncio.sleep(0.2) from scan_stock() - src/config.py: Lower RATE_LIMIT_RPS from 5.0 to 2.0 - tests/test_broker.py: Add 2 tests for hash key rate limiting - tests/test_volatility.py: Add test for scanner concurrency limit Results: - EGW00201 errors: 10 → 0 (100% elimination) - All 290 tests pass - 80% code coverage maintained - Scanner still handles unlimited stocks (just serialized for API safety) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
299 lines
11 KiB
Python
299 lines
11 KiB
Python
"""TDD tests for broker/kis_api.py — written BEFORE implementation."""
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from __future__ import annotations
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import asyncio
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from unittest.mock import AsyncMock, patch
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import pytest
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from src.broker.kis_api import KISBroker
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# ---------------------------------------------------------------------------
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# Token Management
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# ---------------------------------------------------------------------------
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class TestTokenManagement:
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"""Access token must be auto-refreshed and cached."""
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@pytest.mark.asyncio
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async def test_fetches_token_on_first_call(self, settings):
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broker = KISBroker(settings)
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mock_resp = AsyncMock()
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mock_resp.status = 200
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mock_resp.json = AsyncMock(
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return_value={
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"access_token": "tok_abc123",
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"token_type": "Bearer",
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"expires_in": 86400,
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}
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)
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mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
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mock_resp.__aexit__ = AsyncMock(return_value=False)
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with patch("aiohttp.ClientSession.post", return_value=mock_resp):
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token = await broker._ensure_token()
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assert token == "tok_abc123"
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await broker.close()
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@pytest.mark.asyncio
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async def test_reuses_cached_token(self, settings):
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broker = KISBroker(settings)
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broker._access_token = "cached_token"
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broker._token_expires_at = asyncio.get_event_loop().time() + 3600
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token = await broker._ensure_token()
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assert token == "cached_token"
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await broker.close()
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@pytest.mark.asyncio
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async def test_concurrent_token_refresh_calls_api_once(self, settings):
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"""Multiple concurrent token requests should only call API once."""
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broker = KISBroker(settings)
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# Track how many times the mock API is called
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call_count = [0]
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def create_mock_resp():
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call_count[0] += 1
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mock_resp = AsyncMock()
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mock_resp.status = 200
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mock_resp.json = AsyncMock(
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return_value={
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"access_token": "tok_concurrent",
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"token_type": "Bearer",
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"expires_in": 86400,
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}
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)
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mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
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mock_resp.__aexit__ = AsyncMock(return_value=False)
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return mock_resp
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with patch("aiohttp.ClientSession.post", return_value=create_mock_resp()):
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# Launch 5 concurrent token requests
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tokens = await asyncio.gather(
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broker._ensure_token(),
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broker._ensure_token(),
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broker._ensure_token(),
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broker._ensure_token(),
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broker._ensure_token(),
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)
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# All should get the same token
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assert all(t == "tok_concurrent" for t in tokens)
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# API should be called only once (due to lock)
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assert call_count[0] == 1
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await broker.close()
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@pytest.mark.asyncio
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async def test_token_refresh_cooldown_prevents_rapid_retries(self, settings):
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"""Token refresh should enforce cooldown after failure (issue #54)."""
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broker = KISBroker(settings)
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broker._refresh_cooldown = 2.0 # Short cooldown for testing
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# First refresh attempt fails with 403 (EGW00133)
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mock_resp_403 = AsyncMock()
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mock_resp_403.status = 403
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mock_resp_403.text = AsyncMock(
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return_value='{"error_code":"EGW00133","error_description":"접근토큰 발급 잠시 후 다시 시도하세요(1분당 1회)"}'
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)
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mock_resp_403.__aenter__ = AsyncMock(return_value=mock_resp_403)
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mock_resp_403.__aexit__ = AsyncMock(return_value=False)
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with patch("aiohttp.ClientSession.post", return_value=mock_resp_403):
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# First attempt should fail with 403
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with pytest.raises(ConnectionError, match="Token refresh failed"):
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await broker._ensure_token()
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# Second attempt within cooldown should fail with cooldown error
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with pytest.raises(ConnectionError, match="Token refresh on cooldown"):
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await broker._ensure_token()
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await broker.close()
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@pytest.mark.asyncio
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async def test_token_refresh_allowed_after_cooldown(self, settings):
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"""Token refresh should be allowed after cooldown period expires."""
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broker = KISBroker(settings)
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broker._refresh_cooldown = 0.1 # Very short cooldown for testing
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# First attempt fails
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mock_resp_403 = AsyncMock()
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mock_resp_403.status = 403
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mock_resp_403.text = AsyncMock(return_value='{"error_code":"EGW00133"}')
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mock_resp_403.__aenter__ = AsyncMock(return_value=mock_resp_403)
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mock_resp_403.__aexit__ = AsyncMock(return_value=False)
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# Second attempt succeeds
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mock_resp_200 = AsyncMock()
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mock_resp_200.status = 200
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mock_resp_200.json = AsyncMock(
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return_value={
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"access_token": "tok_after_cooldown",
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"expires_in": 86400,
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}
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)
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mock_resp_200.__aenter__ = AsyncMock(return_value=mock_resp_200)
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mock_resp_200.__aexit__ = AsyncMock(return_value=False)
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with patch("aiohttp.ClientSession.post", return_value=mock_resp_403):
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with pytest.raises(ConnectionError, match="Token refresh failed"):
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await broker._ensure_token()
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# Wait for cooldown to expire
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await asyncio.sleep(0.15)
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with patch("aiohttp.ClientSession.post", return_value=mock_resp_200):
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token = await broker._ensure_token()
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assert token == "tok_after_cooldown"
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await broker.close()
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# ---------------------------------------------------------------------------
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# Network Error Handling
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# ---------------------------------------------------------------------------
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class TestNetworkErrorHandling:
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"""Broker must handle network timeouts and HTTP errors gracefully."""
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@pytest.mark.asyncio
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async def test_timeout_raises_connection_error(self, settings):
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broker = KISBroker(settings)
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broker._access_token = "tok"
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broker._token_expires_at = asyncio.get_event_loop().time() + 3600
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with patch(
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"aiohttp.ClientSession.get",
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side_effect=TimeoutError(),
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):
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with pytest.raises(ConnectionError):
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await broker.get_orderbook("005930")
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await broker.close()
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@pytest.mark.asyncio
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async def test_http_500_raises_connection_error(self, settings):
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broker = KISBroker(settings)
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broker._access_token = "tok"
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broker._token_expires_at = asyncio.get_event_loop().time() + 3600
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mock_resp = AsyncMock()
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mock_resp.status = 500
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mock_resp.text = AsyncMock(return_value="Internal Server Error")
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mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
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mock_resp.__aexit__ = AsyncMock(return_value=False)
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with patch("aiohttp.ClientSession.get", return_value=mock_resp):
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with pytest.raises(ConnectionError):
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await broker.get_orderbook("005930")
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await broker.close()
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# ---------------------------------------------------------------------------
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# Rate Limiter
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# ---------------------------------------------------------------------------
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class TestRateLimiter:
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"""The leaky bucket rate limiter must throttle requests."""
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@pytest.mark.asyncio
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async def test_rate_limiter_does_not_block_under_limit(self, settings):
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broker = KISBroker(settings)
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# Should complete without blocking when under limit
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await broker._rate_limiter.acquire()
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await broker.close()
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@pytest.mark.asyncio
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async def test_send_order_acquires_rate_limiter_twice(self, settings):
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"""send_order must acquire rate limiter for both hash key and order call."""
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broker = KISBroker(settings)
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broker._access_token = "tok"
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broker._token_expires_at = asyncio.get_event_loop().time() + 3600
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# Mock hash key response
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mock_hash_resp = AsyncMock()
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mock_hash_resp.status = 200
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mock_hash_resp.json = AsyncMock(return_value={"HASH": "abc123"})
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mock_hash_resp.__aenter__ = AsyncMock(return_value=mock_hash_resp)
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mock_hash_resp.__aexit__ = AsyncMock(return_value=False)
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# Mock order response
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mock_order_resp = AsyncMock()
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mock_order_resp.status = 200
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mock_order_resp.json = AsyncMock(return_value={"rt_cd": "0"})
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mock_order_resp.__aenter__ = AsyncMock(return_value=mock_order_resp)
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mock_order_resp.__aexit__ = AsyncMock(return_value=False)
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with patch(
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"aiohttp.ClientSession.post", side_effect=[mock_hash_resp, mock_order_resp]
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):
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with patch.object(
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broker._rate_limiter, "acquire", new_callable=AsyncMock
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) as mock_acquire:
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await broker.send_order("005930", "BUY", 1, 50000)
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assert mock_acquire.call_count == 2
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await broker.close()
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# ---------------------------------------------------------------------------
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# Hash Key Generation
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# ---------------------------------------------------------------------------
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class TestHashKey:
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"""POST requests to KIS require a hash key."""
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@pytest.mark.asyncio
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async def test_generates_hash_key_for_post_body(self, settings):
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broker = KISBroker(settings)
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broker._access_token = "tok"
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broker._token_expires_at = asyncio.get_event_loop().time() + 3600
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body = {"CANO": "12345678", "ACNT_PRDT_CD": "01"}
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mock_resp = AsyncMock()
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mock_resp.status = 200
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mock_resp.json = AsyncMock(return_value={"HASH": "abc123hash"})
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mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
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mock_resp.__aexit__ = AsyncMock(return_value=False)
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with patch("aiohttp.ClientSession.post", return_value=mock_resp):
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hash_key = await broker._get_hash_key(body)
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assert isinstance(hash_key, str)
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assert len(hash_key) > 0
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await broker.close()
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@pytest.mark.asyncio
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async def test_hash_key_acquires_rate_limiter(self, settings):
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"""_get_hash_key must go through the rate limiter to prevent burst."""
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broker = KISBroker(settings)
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broker._access_token = "tok"
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broker._token_expires_at = asyncio.get_event_loop().time() + 3600
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body = {"CANO": "12345678", "ACNT_PRDT_CD": "01"}
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mock_resp = AsyncMock()
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mock_resp.status = 200
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mock_resp.json = AsyncMock(return_value={"HASH": "abc123hash"})
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mock_resp.__aenter__ = AsyncMock(return_value=mock_resp)
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mock_resp.__aexit__ = AsyncMock(return_value=False)
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with patch("aiohttp.ClientSession.post", return_value=mock_resp):
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with patch.object(
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broker._rate_limiter, "acquire", new_callable=AsyncMock
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) as mock_acquire:
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await broker._get_hash_key(body)
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mock_acquire.assert_called_once()
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await broker.close()
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