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105 lines
3.7 KiB
Python
105 lines
3.7 KiB
Python
import os
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import pathlib
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from contextlib import closing
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from fixtures.zenith_fixtures import ZenithEnv, check_restored_datadir_content
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from fixtures.log_helper import log
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#
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# Test CREATE DATABASE when there have been relmapper changes
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#
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def test_createdb(zenith_simple_env: ZenithEnv):
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env = zenith_simple_env
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env.zenith_cli.create_branch('test_createdb', 'empty')
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pg = env.postgres.create_start('test_createdb')
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log.info("postgres is running on 'test_createdb' branch")
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with closing(pg.connect()) as conn:
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with conn.cursor() as cur:
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# Cause a 'relmapper' change in the original branch
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cur.execute('VACUUM FULL pg_class')
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cur.execute('CREATE DATABASE foodb')
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cur.execute('SELECT pg_current_wal_insert_lsn()')
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lsn = cur.fetchone()[0]
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# Create a branch
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env.zenith_cli.create_branch('test_createdb2', 'test_createdb', ancestor_start_lsn=lsn)
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pg2 = env.postgres.create_start('test_createdb2')
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# Test that you can connect to the new database on both branches
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for db in (pg, pg2):
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with closing(db.connect(dbname='foodb')) as conn:
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with conn.cursor() as cur:
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# Check database size in both branches
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cur.execute(
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'select pg_size_pretty(pg_database_size(%s)), pg_size_pretty(sum(pg_relation_size(oid))) from pg_class where relisshared is false;',
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('foodb', ))
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res = cur.fetchone()
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# check that dbsize equals sum of all relation sizes, excluding shared ones
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# This is how we define dbsize in zenith for now
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assert res[0] == res[1]
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#
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# Test DROP DATABASE
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#
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def test_dropdb(zenith_simple_env: ZenithEnv, test_output_dir):
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env = zenith_simple_env
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env.zenith_cli.create_branch('test_dropdb', 'empty')
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pg = env.postgres.create_start('test_dropdb')
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log.info("postgres is running on 'test_dropdb' branch")
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with closing(pg.connect()) as conn:
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with conn.cursor() as cur:
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cur.execute('CREATE DATABASE foodb')
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cur.execute('SELECT pg_current_wal_insert_lsn()')
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lsn_before_drop = cur.fetchone()[0]
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cur.execute("SELECT oid FROM pg_database WHERE datname='foodb';")
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dboid = cur.fetchone()[0]
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with closing(pg.connect()) as conn:
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with conn.cursor() as cur:
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cur.execute('DROP DATABASE foodb')
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cur.execute('CHECKPOINT')
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cur.execute('SELECT pg_current_wal_insert_lsn()')
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lsn_after_drop = cur.fetchone()[0]
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# Create two branches before and after database drop.
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env.zenith_cli.create_branch('test_before_dropdb',
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'test_dropdb',
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ancestor_start_lsn=lsn_before_drop)
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pg_before = env.postgres.create_start('test_before_dropdb')
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env.zenith_cli.create_branch('test_after_dropdb',
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'test_dropdb',
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ancestor_start_lsn=lsn_after_drop)
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pg_after = env.postgres.create_start('test_after_dropdb')
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# Test that database exists on the branch before drop
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pg_before.connect(dbname='foodb').close()
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# Test that database subdir exists on the branch before drop
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assert pg_before.pgdata_dir
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dbpath = pathlib.Path(pg_before.pgdata_dir) / 'base' / str(dboid)
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log.info(dbpath)
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assert os.path.isdir(dbpath) == True
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# Test that database subdir doesn't exist on the branch after drop
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assert pg_after.pgdata_dir
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dbpath = pathlib.Path(pg_after.pgdata_dir) / 'base' / str(dboid)
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log.info(dbpath)
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assert os.path.isdir(dbpath) == False
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# Check that we restore the content of the datadir correctly
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check_restored_datadir_content(test_output_dir, env, pg)
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