def test_reopen_handle(setup_path):
with ensure_clean_path(setup_path) as path:
store = HDFStore(path, mode="a")
store["a"] = tm.makeTimeSeries()
msg = (
r"Re-opening the file \[[\S]*\] with mode \[a\] will delete the "
"current file!"
)
# invalid mode change
with pytest.raises(PossibleDataLossError, match=msg):
store.open("w")
store.close()
assert not store.is_open
# truncation ok here
store.open("w")
assert store.is_open
assert len(store) == 0
store.close()
assert not store.is_open
store = HDFStore(path, mode="a")
store["a"] = tm.makeTimeSeries()
# reopen as read
store.open("r")
assert store.is_open
assert len(store) == 1
assert store._mode == "r"
store.close()
assert not store.is_open
# reopen as append
store.open("a")
assert store.is_open
assert len(store) == 1
assert store._mode == "a"
store.close()
assert not store.is_open
# reopen as append (again)
store.open("a")
assert store.is_open
assert len(store) == 1
assert store._mode == "a"
store.close()
assert not store.is_open
