test(logging): cover the PTY threshold warning filter

tests/test_pty_warning_filter.py

@@ -0,0 +1,41 @@
+import logging
+from collections.abc import Iterator
+
+import pytest
+
+from strix.telemetry import logging as tlog
+
+
+_SDK_LOGGER = "agents.sandbox.sandboxes.docker"
+
+
+@pytest.fixture
+def sdk_logger() -> Iterator[logging.Logger]:
+    logger = logging.getLogger(_SDK_LOGGER)
+    original = list(logger.filters)
+    logger.filters.clear()
+    tlog._silence_pty_threshold_warning.cache_clear()
+    yield logger
+    logger.filters[:] = original
+    tlog._silence_pty_threshold_warning.cache_clear()
+
+
+def _record(msg: str, *args: object) -> logging.LogRecord:
+    return logging.LogRecord(_SDK_LOGGER, logging.WARNING, __file__, 0, msg, args, None)
+
+
+def test_installed_filter_drops_pty_threshold_warning(sdk_logger: logging.Logger) -> None:
+    tlog._silence_pty_threshold_warning()
+    record = _record("PTY process count reached warning threshold: %s active sessions", 62)
+    assert not sdk_logger.filter(record)
+
+
+def test_installed_filter_keeps_other_warnings(sdk_logger: logging.Logger) -> None:
+    tlog._silence_pty_threshold_warning()
+    assert sdk_logger.filter(_record("something else went wrong"))
+
+
+def test_install_is_idempotent(sdk_logger: logging.Logger) -> None:
+    tlog._silence_pty_threshold_warning()
+    tlog._silence_pty_threshold_warning()
+    assert len(sdk_logger.filters) == 1