## Problem Kattis and USACO had zero offline test coverage — no fixtures, no conftest routers, and no entries in the test matrix. The `precision` field and error paths were also unverified across all platforms. ## Solution Add HTML fixtures for both platforms and wire up `httpx.AsyncClient.get` routers in `conftest.py` following the existing CSES/CodeChef pattern. Extend the test matrix from 12 to 23 parametrized cases. Add a dedicated test for the Kattis contest-vs-slug fallback path (verifying `contest_url` and `standings_url`), three parametrized metadata error cases, and a targeted assertion that `extract_precision` returns a non-`None` float for problems with floating-point tolerance hints. Closes #281. |
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