18c93d4eaa
Mount the instrumentator immediately after FastAPI app creation, excluding /health and /metrics from request metrics to keep http_requests_total focused on real application traffic. Refs #652 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
25 lines
833 B
Python
25 lines
833 B
Python
"""Tests for Prometheus metrics exposed by the OCR service.
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Each test that asserts on a counter/gauge value uses a fresh CollectorRegistry
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(see decision #3 on issue #652) to keep the metrics isolated between tests.
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"""
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from unittest.mock import patch
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import pytest
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from httpx import ASGITransport, AsyncClient
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from main import app
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@pytest.mark.asyncio
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async def test_metrics_endpoint_returns_200():
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"""`GET /metrics` returns 200 with Prometheus exposition content."""
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with patch("main.kraken_engine.load_models"), \
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patch("main.load_spell_checker"):
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async with AsyncClient(transport=ASGITransport(app=app), base_url="http://test") as client:
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response = await client.get("/metrics")
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assert response.status_code == 200
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assert "text/plain" in response.headers.get("content-type", "")
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