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import os
from ase.db import connect
db_name = "test_vacuum.db"
def write_entries_to_db(db, n_entries_db=30):
for i in range(n_entries_db):
db.reserve(mykey=f'test_{i}')
def update_keys_in_db(db):
new_keys = {}
for i in range(50):
new_keys.update({f'mynewkey_{i}': 'test'})
for row in db.select():
db.update(row.id, **new_keys)
def check_delete_function(db):
db_size_full = os.path.getsize(db_name)
db.delete([row.id for row in db.select()])
db_size_empty = os.path.getsize(db_name)
assert db_size_full > db_size_empty
def check_update_function(db):
db_size_update = os.path.getsize(db_name)
db.vacuum() # call vacuum explicitly
db_size_update_vacuum = os.path.getsize(db_name)
assert db_size_update > db_size_update_vacuum
def test_delete_vacuum():
# test to call from within the class using the delete function
db = connect(db_name)
write_entries_to_db(db)
check_delete_function(db)
def test_delete_vacuum_context():
# try within context
with connect(db_name) as db:
write_entries_to_db(db)
with connect(db_name) as db:
check_delete_function(db)
def test_update_vacuum():
# test to call vacuum explicitly
db = connect(db_name)
write_entries_to_db(db)
update_keys_in_db(db)
check_update_function(db)
def test_update_vacuum_context():
# within context manager
with connect(db_name) as db:
write_entries_to_db(db)
with connect(db_name) as db:
update_keys_in_db(db)
with connect(db_name) as db:
check_update_function(db)
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