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odysseus/tests/test_caldav_prune_parse_failure.py
T

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"""CalDAV sync must not prune the window when it can't fully read the server.
The prune deletes local caldav rows whose UID the server didn't return. `seen_uids`
is built only from objects that parsed, so any parse failure (total or partial)
makes it an incomplete view of the server:
- total failure: `seen_uids` is empty and the prune falls back to `uid.isnot(None)`
(match-all), wiping every event in the window;
- partial failure: the events that failed to parse are absent from `seen_uids`, so
`~uid.in_(seen_uids)` deletes those still-upstream events.
`_should_prune_window` therefore only allows the prune on a clean read.
"""
from src.caldav_sync import _should_prune_window
def test_prune_runs_on_clean_read():
# Clean read with events -> the normal ~uid.in_(seen) prune is safe.
assert _should_prune_window({"uid-a", "uid-b"}, parse_failed=False) is True
def test_prune_runs_when_calendar_genuinely_empty():
# Clean read, no objects -> genuinely empty window -> safe to prune.
assert _should_prune_window(set(), parse_failed=False) is True
def test_prune_skipped_when_all_objects_failed_to_parse():
# Every object failed -> empty seen_uids is "couldn't read", not "empty
# calendar" -> must NOT prune (would delete the whole window).
assert _should_prune_window(set(), parse_failed=True) is False
def test_prune_skipped_on_partial_parse_failure():
# Some objects parsed and at least one failed: seen_uids is incomplete, so
# pruning would delete the unparsed-but-still-upstream events. Skipping the
# prune keeps the local copy of the unparsed event instead of deleting it.
assert _should_prune_window({"parsed-uid"}, parse_failed=True) is False