* ci: improve Azure test reliability Azure has intermittent failures, often the macOS framework-Python `posix_spawn: Undefined error: 0` spawn race under load, plus transient download flakiness. Address both: - Retry integration tests via pytest-rerunfailures (already required): add `--reruns=2 --reruns-delay=5` to the serial and non-serial runs so a single transient flake self-heals instead of failing the whole job. - Cap Azure at `--num-processes 3` to reduce concurrent process spawning (the macOS runner was using 4 xdist workers), lowering the spawn-race probability and peak resource pressure. - Cache downloads across runs: relocate CIBW_CACHE_PATH to a stable path and add a Cache@2 task (interpreter downloads + per-worker test pip caches live under it), cutting the network-download flake surface. - Bump the Azure host interpreter to 3.13. Assisted-by: ClaudeCode:claude-opus-4.8 * ci: stabilize iOS tests, bound rerun cost An iOS run on Azure (build 9043) hung for the full 40-min pytest timeout on the second build config of test_ios_platforms, then reran twice (reruns=2), blowing past the 180-min job cap with no useful signal. The hang was a stuck simulator/xcodebuild on the second config, after the first config had run. - Shut down running simulators before each parametrized config via a `clean_ios_simulators` fixture, so a simulator left booted/wedged by the previous config isn't reused. - Drop iOS reruns from 2 to 1. One retry still covers the documented "fails the first time" simulator-boot flake, while halving the worst-case retry cost (3x40=120min -> 2x40=80min) on a hang. Assisted-by: ClaudeCode:claude-opus-4.8 * ci: don't limit num processes Signed-off-by: Henry Schreiner <henryfs@princeton.edu> * ci: rerun OCI unit tests that pull from Docker Hub test_local_image et al. occasionally fail on a transient Docker Hub anonymous-pull blip ("unauthorized: authentication required") when pulling debian:trixie-slim. The integration runs already self-heal via pytest-rerunfailures, but the unit run had no reruns, so a single flake failed the whole job. Mark the three network-dependent OCI tests (test_local_image, test_enter_error, test_multiarch_image) flaky so they retry instead of blanket-rerunning the suite. Assisted-by: ClaudeCode:claude-opus-4.8 * Drop iOS clean step Co-authored-by: Henry Schreiner <HenrySchreinerIII@gmail.com> * ci: scope integration reruns to test_0_basic::test Drop the blanket --reruns from the serial and non-serial integration runs and instead mark test_0_basic.py::test as flaky, so only the known flaky basic test is retried. Assisted-by: ClaudeCode:claude-opus-4.8 --------- Signed-off-by: Henry Schreiner <henryfs@princeton.edu>
This folder contains integration tests for cibuildwheel.