mirror of
https://github.com/neondatabase/neon.git
synced 2026-01-14 00:42:54 +00:00
4b87acb1f6
* Use logging in python tests * Use f-strings for logs * Don't log test output while running * Use only pytest logging handler * Add more info about pytest logging
93 lines
3.5 KiB
Python
93 lines
3.5 KiB
Python
import subprocess
|
|
from fixtures.zenith_fixtures import PostgresFactory, ZenithPageserver
|
|
from fixtures.log_helper import log
|
|
|
|
pytest_plugins = ("fixtures.zenith_fixtures")
|
|
|
|
|
|
#
|
|
# Create a couple of branches off the main branch, at a historical point in time.
|
|
#
|
|
def test_branch_behind(zenith_cli, pageserver: ZenithPageserver, postgres: PostgresFactory, pg_bin):
|
|
# Branch at the point where only 100 rows were inserted
|
|
zenith_cli.run(["branch", "test_branch_behind", "empty"])
|
|
|
|
pgmain = postgres.create_start('test_branch_behind')
|
|
log.info("postgres is running on 'test_branch_behind' branch")
|
|
|
|
main_pg_conn = pgmain.connect()
|
|
main_cur = main_pg_conn.cursor()
|
|
|
|
# Create table, and insert the first 100 rows
|
|
main_cur.execute('CREATE TABLE foo (t text)')
|
|
main_cur.execute('''
|
|
INSERT INTO foo
|
|
SELECT 'long string to consume some space' || g
|
|
FROM generate_series(1, 100) g
|
|
''')
|
|
main_cur.execute('SELECT pg_current_wal_insert_lsn()')
|
|
lsn_a = main_cur.fetchone()[0]
|
|
log.info(f'LSN after 100 rows: {lsn_a}')
|
|
|
|
# Insert some more rows. (This generates enough WAL to fill a few segments.)
|
|
main_cur.execute('''
|
|
INSERT INTO foo
|
|
SELECT 'long string to consume some space' || g
|
|
FROM generate_series(1, 200000) g
|
|
''')
|
|
main_cur.execute('SELECT pg_current_wal_insert_lsn()')
|
|
lsn_b = main_cur.fetchone()[0]
|
|
log.info(f'LSN after 200100 rows: {lsn_b}')
|
|
|
|
# Branch at the point where only 100 rows were inserted
|
|
zenith_cli.run(["branch", "test_branch_behind_hundred", "test_branch_behind@" + lsn_a])
|
|
|
|
# Insert many more rows. This generates enough WAL to fill a few segments.
|
|
main_cur.execute('''
|
|
INSERT INTO foo
|
|
SELECT 'long string to consume some space' || g
|
|
FROM generate_series(1, 200000) g
|
|
''')
|
|
main_cur.execute('SELECT pg_current_wal_insert_lsn()')
|
|
|
|
main_cur.execute('SELECT pg_current_wal_insert_lsn()')
|
|
lsn_c = main_cur.fetchone()[0]
|
|
log.info(f'LSN after 400100 rows: {lsn_c}')
|
|
|
|
# Branch at the point where only 200100 rows were inserted
|
|
zenith_cli.run(["branch", "test_branch_behind_more", "test_branch_behind@" + lsn_b])
|
|
|
|
pg_hundred = postgres.create_start("test_branch_behind_hundred")
|
|
pg_more = postgres.create_start("test_branch_behind_more")
|
|
|
|
# On the 'hundred' branch, we should see only 100 rows
|
|
hundred_pg_conn = pg_hundred.connect()
|
|
hundred_cur = hundred_pg_conn.cursor()
|
|
hundred_cur.execute('SELECT count(*) FROM foo')
|
|
assert hundred_cur.fetchone() == (100, )
|
|
|
|
# On the 'more' branch, we should see 100200 rows
|
|
more_pg_conn = pg_more.connect()
|
|
more_cur = more_pg_conn.cursor()
|
|
more_cur.execute('SELECT count(*) FROM foo')
|
|
assert more_cur.fetchone() == (200100, )
|
|
|
|
# All the rows are visible on the main branch
|
|
main_cur.execute('SELECT count(*) FROM foo')
|
|
assert main_cur.fetchone() == (400100, )
|
|
|
|
# Check bad lsn's for branching
|
|
|
|
# branch at segment boundary
|
|
zenith_cli.run(["branch", "test_branch_segment_boundary", "test_branch_behind@0/3000000"])
|
|
pg = postgres.create_start("test_branch_segment_boundary")
|
|
cur = pg.connect().cursor()
|
|
cur.execute('SELECT 1')
|
|
assert cur.fetchone() == (1, )
|
|
|
|
# branch at pre-initdb lsn
|
|
try:
|
|
zenith_cli.run(["branch", "test_branch_preinitdb", "test_branch_behind@0/42"])
|
|
except subprocess.CalledProcessError:
|
|
log.info("Branch creation with pre-initdb LSN failed (as expected)")
|