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b35e060c8e
firebird-qa/tests/functional/replication/test_oltp_emul_ddl.py
pavel-zotov b35e060c8e Removed obsolete comments. Adjusted notes.
2023-12-12 11:00:13 +03:00

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#coding:utf-8
"""
ID: replication.oltp_emul_ddl
TITLE: Applying full DDL from OLTP-EMUL test on master with further check replica
DESCRIPTION:
We create table and add data in it according to ticket info.
The last DDL that we do is creating table with name 't_completed'. It serves as 'flag' to be checked that all DDL actions
on master finished.
After this we wait until replica becomes actual to master, and this delay will last no more then threshold that
is defined by MAX_TIME_FOR_WAIT_DATA_IN_REPLICA variable (measured in seconds), see QA_ROOT/files/test_config.ini
When table 't_completed' will appear in replica, we run query to the table 'test' in order to check that it contains
only data that were allowed on master.
Further, we invoke ISQL with executing auxiliary script for drop all DB objects on master (with '-nod' command switch).
After all objects will be dropped, we have to wait again until replica becomes actual with master.
Check that both DB have no custom objects is performed (see UNION-ed query to rdb$ tables + filtering on rdb$system_flag).
Finally, we extract metadata for master and replica and make comparison.
The only difference in metadata must be 'CREATE DATABASE' statement with different DB names - we suppress it,
thus metadata difference must not be issued.
FBTEST: tests.functional.replication.oltp_emul_ddl
NOTES:
[22.04.2023] pzotov
Test was fully re-implemented. We have to query replica DATABASE for presense of data that we know there must appear.
We have to avoid query of replication log - not only verbose can be disabled, but also because code is too complex.
We use 'assert' only at the final point of test, with printing detalization about encountered problem(s).
During all previous steps, we only store unexpected output to variables, e.g.: out_main = capsys.readouterr().out etc.
Checked on Windows 4.0.3.2931, 5.0.0.1022, SS and CS.
[07.09.2023] pzotov
Added 'DEBUG_MODE' variable for quick switch to debug branches if something goes wrong.
Added code to explicitly assign 'fb_port' to default value (3050), with check that port is listening (see 'import socket')
Replaced hardcoded 'SYSDBA' and 'masterkey' with act.db.user and act.db.password
(see call of generate_sync_settings_sql() and its code)
Checked on Linux 5.0.0.1190 CS with default firebird.conf and firebird-driver.conf without port specifying
(see letters from dimitr, 06.09.2023)
"""
import os
import locale
import shutil
import zipfile
import socket
from difflib import unified_diff
from pathlib import Path
import time
import pytest
from firebird.qa import *
from firebird.driver import connect, create_database, DbWriteMode, ReplicaMode, ShutdownMode, ShutdownMethod, DatabaseError
DEBUG_MODE = 0
# QA_GLOBALS -- dict, is defined in qa/plugin.py, obtain settings
# from act.files_dir/'test_config.ini':
repl_settings = QA_GLOBALS['replication']
MAX_TIME_FOR_WAIT_DATA_IN_REPLICA = int(repl_settings['max_time_for_wait_data_in_replica'])
MAIN_DB_ALIAS = repl_settings['main_db_alias']
REPL_DB_ALIAS = repl_settings['repl_db_alias']
db_main = db_factory( filename = '#' + MAIN_DB_ALIAS, do_not_create = True, do_not_drop = True)
db_repl = db_factory( filename = '#' + REPL_DB_ALIAS, do_not_create = True, do_not_drop = True)
substitutions = [('Start removing objects in:.*', 'Start removing objects'),
('Finish. Total objects removed: [1-9]\\d*', 'Finish. Total objects removed'),
('.* CREATE DATABASE .*', ''),
]
act_db_main = python_act('db_main', substitutions=substitutions)
act_db_repl = python_act('db_repl', substitutions=substitutions)
tmp_oltp_build_sql = temp_file('tmp_oltp_emul_ddl.sql')
tmp_oltp_build_log = temp_file('tmp_oltp_emul_ddl.log')
#--------------------------------------------
def cleanup_folder(p):
# Removed all files and subdirs in the folder <p>
# Used for cleanup <repl_journal> and <repl_archive> when replication must be reset
# in case when any error occurred during test execution.
assert os.path.dirname(p) != p, f"@@@ ABEND @@@ CAN NOT operate in the file system root directory. Check your code!"
for root, dirs, files in os.walk(p):
for f in files:
os.unlink(os.path.join(root, f))
for d in dirs:
shutil.rmtree(os.path.join(root, d))
return len(os.listdir(p))
#--------------------------------------------
def reset_replication(act_db_main, act_db_repl, db_main_file, db_repl_file, cleanup_repl_dirs = True):
out_reset = ''
with act_db_main.connect_server() as srv:
# !! IT IS ASSUMED THAT REPLICATION FOLDERS ARE IN THE SAME DIR AS <DB_MAIN> !!
# DO NOT use 'a.db.db_path' for ALIASED database!
# It will return '.' rather than full path+filename.
repl_root_path = Path(db_main_file).parent
repl_jrn_sub_dir = repl_settings['journal_sub_dir']
repl_arc_sub_dir = repl_settings['archive_sub_dir']
for f in (db_main_file, db_repl_file):
# Method db.drop() changes LINGER to 0, issues 'delete from mon$att' with suppressing exceptions
# and calls 'db.drop_database()' (also with suppressing exceptions).
# We change DB state to FULL SHUTDOWN instead of call action.db.drop() because
# this is more reliable (it kills all attachments in all known cases and does not use mon$ table)
#
try:
srv.database.shutdown(database = f, mode = ShutdownMode.FULL, method = ShutdownMethod.FORCED, timeout = 0)
except DatabaseError as e:
out_reset += e.__str__()
# REMOVE db file from disk:
###########################
os.unlink(f)
# Clean folders repl_journal and repl_archive: remove all files from there.
#
if cleanup_repl_dirs:
for p in (repl_jrn_sub_dir,repl_arc_sub_dir):
if cleanup_folder(repl_root_path / p) > 0:
out_reset += f"Directory {str(p)} remains non-empty.\n"
if out_reset == '':
for a in (act_db_main,act_db_repl):
d = a.db.db_path
try:
dbx = create_database(str(d), user = a.db.user)
dbx.close()
with a.connect_server() as srv:
srv.database.set_write_mode(database = d, mode = DbWriteMode.ASYNC)
srv.database.set_sweep_interval(database = d, interval = 0)
if a == act_db_repl:
srv.database.set_replica_mode(database = d, mode = ReplicaMode.READ_ONLY)
else:
with a.db.connect() as con:
con.execute_immediate('alter database enable publication')
con.execute_immediate('alter database include all to publication')
con.commit()
except DatabaseError as e:
out_reset += e.__str__()
# Must remain EMPTY:
return out_reset
#--------------------------------------------
def watch_replica( a: Action, max_allowed_time_for_wait, ddl_ready_query = '', isql_check_script = '', replica_expected_out = ''):
retcode = 1;
ready_to_check = False
if ddl_ready_query:
with a.db.connect(no_db_triggers = True) as con:
with con.cursor() as cur:
for i in range(0,max_allowed_time_for_wait):
cur.execute(ddl_ready_query)
count_actual = cur.fetchone()
if count_actual:
ready_to_check = True
break
else:
con.rollback()
time.sleep(1)
else:
ready_to_check = True
if not ready_to_check:
print( f'UNEXPECTED. Query to check DDL completion did not return any rows for {max_allowed_time_for_wait} seconds.' )
print('Initial check query:')
print(ddl_ready_query)
return
final_check_pass = False
if isql_check_script:
retcode = 0
for i in range(max_allowed_time_for_wait):
a.reset()
a.expected_stdout = replica_expected_out
a.isql(switches=['-q', '-nod'], input = isql_check_script, combine_output = True)
if a.return_code:
# "Token unknown", "Name longer than database column size" etc: we have to
# immediately break from this loop because isql_check_script is incorrect!
break
if a.clean_stdout == a.clean_expected_stdout:
final_check_pass = True
break
if i < max_allowed_time_for_wait-1:
time.sleep(1)
if not final_check_pass:
print(f'UNEXPECTED. Final check query did not return expected dataset for {max_allowed_time_for_wait} seconds.')
print('Final check query:')
print(isql_check_script)
print('Expected output:')
print(a.clean_expected_stdout)
print('Actual output:')
print(a.clean_stdout)
print(f'ISQL return_code={a.return_code}')
print(f'Waited for {i} seconds')
a.reset()
else:
final_check_pass = True
return
#--------------------------------------------
def drop_db_objects(act_db_main: Action, act_db_repl: Action, capsys):
# return initial state of master DB:
# remove all DB objects (tables, views, ...):
#
db_main_meta, db_repl_meta = '', ''
drop_failed_txt = ''
for a in (act_db_main,act_db_repl):
if a == act_db_main:
sql_clean = (a.files_dir / 'drop-all-db-objects.sql').read_text()
a.expected_stdout = """
Start removing objects
Finish. Total objects removed
"""
a.isql(switches=['-q', '-nod'], input = sql_clean, combine_output = True)
if a.clean_stdout == a.clean_expected_stdout:
a.reset()
else:
drop_failed_txt = '\n'.join( (f'Problem with DROP all objects in {a.db.db_path}:', a.clean_stdout) )
a.reset()
break
# NB: one need to remember that rdb$system_flag can be NOT ONLY 1 for system used objects!
# For example, it has value =3 for triggers that are created to provide CHECK-constraints,
# Custom DB objects always have rdb$system_flag = 0 (or null for some very old databases).
# We can be sure that there are no custom DB objects if following query result is NON empty:
#
ddl_ready_query = """
select 1
from rdb$database
where NOT exists (
select custom_db_object_flag
from (
select rt.rdb$system_flag as custom_db_object_flag from rdb$triggers rt
UNION ALL
select rt.rdb$system_flag from rdb$relations rt
UNION ALL
select rt.rdb$system_flag from rdb$functions rt
UNION ALL
select rt.rdb$system_flag from rdb$procedures rt
UNION ALL
select rt.rdb$system_flag from rdb$exceptions rt
UNION ALL
select rt.rdb$system_flag from rdb$fields rt
UNION ALL
select rt.rdb$system_flag from rdb$collations rt
UNION ALL
select rt.rdb$system_flag from rdb$generators rt
UNION ALL
select rt.rdb$system_flag from rdb$roles rt
UNION ALL
select rt.rdb$system_flag from rdb$auth_mapping rt
UNION ALL
select 1 from sec$users s
where upper(s.sec$user_name) <> 'SYSDBA'
) t
where coalesce(t.custom_db_object_flag,0) = 0
)
"""
##############################################################################
### W A I T U N T I L R E P L I C A B E C O M E S A C T U A L ###
##############################################################################
watch_replica( act_db_repl, MAX_TIME_FOR_WAIT_DATA_IN_REPLICA, ddl_ready_query)
# Must be EMPTY:
print(capsys.readouterr().out)
db_main_meta = a.extract_meta(charset = 'utf8', io_enc = 'utf8')
else:
db_repl_meta = a.extract_meta(charset = 'utf8', io_enc = 'utf8')
######################
### A C H T U N G ###
######################
# MANDATORY, OTHERWISE REPLICATION GETS STUCK ON SECOND RUN OF THIS TEST
# WITH 'ERROR: Record format with length NN is not found for table TEST':
a.gfix(switches=['-sweep', a.db.dsn])
if drop_failed_txt:
# No sens to compare metadata if we could not drop all objects in any of databases.
print(drop_failed_txt)
pass
else:
# Final point: metadata must become equal:
#
diff_meta = ''.join(unified_diff( \
[x for x in db_main_meta.splitlines() if 'CREATE DATABASE' not in x],
[x for x in db_repl_meta.splitlines() if 'CREATE DATABASE' not in x])
)
# Must be EMPTY:
if diff_meta:
print('Metadata differs after DROP all objects')
print(diff_meta)
#--------------------------------------------
def generate_sync_settings_sql(db_main_file_name, dba_usr, dba_psw, fb_port = 3050):
def generate_inject_setting_sql(working_mode, mcode, new_value, allow_insert_if_eof = 0):
sql_inject_setting = ''
if allow_insert_if_eof == 0:
sql_inject_setting = '''
update settings set svalue = %(new_value)s
where working_mode = upper('%(working_mode)s') and mcode = upper('%(mcode)s');
if (row_count = 0) then
exception ex_record_not_found using('SETTINGS', q'{working_mode = upper('%(working_mode)s') and mcode = upper('%(mcode)s')}');
''' % locals()
else:
sql_inject_setting = '''
update or insert into settings(working_mode, mcode, svalue)
values( upper('%(working_mode)s'), upper('%(mcode)s'), %(new_value)s )
matching (working_mode, mcode);
''' % locals()
return sql_inject_setting
sql_adjust_settings_table = '''
set list on;
select 'Adjust settings: start at ' || cast('now' as timestamp) as msg from rdb$database;
set term ^;
execute block as
begin
'''
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'init', 'working_mode', "upper('small_03')" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'enable_mon_query', "'0'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'unit_selection_method', "'random'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'build_with_split_heavy_tabs', "'1'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'build_with_qd_compound_ordr', "lower('most_selective_first')" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'build_with_separ_qdistr_idx', "'0'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'used_in_replication', "'1'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'separate_workers', "'1'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'workers_count', "'100'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'update_conflict_percent', "'0'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'init', 'connect_str', "'connect ''localhost:%(db_main_file_name)s'' user ''%(dba_usr)s'' password ''%(dba_psw)s'';'" % locals(), 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'mon_unit_list', "'//'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'halt_test_on_errors', "'/PK/CK/'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'qmism_verify_bitset', "'1'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'recalc_idx_min_interval', "'9999999'" ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'warm_time', "'0'", 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'test_intervals', "'10'", 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'init', 'tmp_worker_role_name', "upper('tmp$oemul$worker')", 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'init', 'tmp_worker_user_prefix', "upper('tmp$oemul$user_')", 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'common', 'use_es', "'2'", 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'init', 'host', "'localhost'", 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'init', 'port', "'%(fb_port)s'" % locals(), 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'init', 'usr', "'%(dba_usr)s'" % locals(), 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'init', 'pwd', "'%(dba_psw)s'" % locals(), 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'init', 'tmp_worker_user_pswd', "'0Ltp-Emu1'", 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'init', 'conn_pool_support', "'1'", 1 ) ) )
sql_adjust_settings_table = ''.join( (sql_adjust_settings_table, generate_inject_setting_sql( 'init', 'resetting_support', "'1'", 1 ) ) )
sql_adjust_settings_table += '''
end ^
set term ;^
commit;
select 'Adjust settings: finish at ' || cast('now' as timestamp) as msg from rdb$database;
set list off;
'''
return sql_adjust_settings_table
#--------------------------------------------
def get_replication_log(a: Action):
replication_log = a.home_dir / 'replication.log'
rlog_lines = []
with open(replication_log, 'r') as f:
rlog_lines = f.readlines()
return rlog_lines
#--------------------------------------------
@pytest.mark.version('>=4.0.1')
def test_1(act_db_main: Action, act_db_repl: Action, tmp_oltp_build_sql: Path, tmp_oltp_build_log: Path, capsys):
tmp_oltp_sql_files = []
out_prep, out_init, out_main, out_drop = '', '', '', ''
# Obtain full path + filename for DB_MAIN and DB_REPL aliases.
# NOTE: we must NOT use 'a.db.db_path' for ALIASED databases!
# It will return '.' rather than full path+filename.
# Use only con.info.name for that!
#
db_info = {}
for a in (act_db_main, act_db_repl):
with a.db.connect(no_db_triggers = True) as con:
#if a == act_db_main and a.vars['server-arch'] == 'Classic' and os.name != 'nt':
# pytest.skip("Waiting for FIX: 'Engine is shutdown' in replication log for CS. Linux only.")
db_info[a, 'db_full_path'] = con.info.name
repl_log_old = get_replication_log(act_db_main)
repl_log_new = repl_log_old.copy()
# NB, 06-sep-2023: we have to explicitly assign default value for listening port because OLTP-EMUL requires it always.
# If $QA_HOME/firebird-driver.conf does not contain line with this parameter then act_db_main.port will be None.
# In that case execution of some scripts will fail because of conversion error from string 'None' to int variable.
# This problem was detected for script 'oltp-emul-09_adjust_eds_calls.sql':
# declare v_port int;
# ...
# select ... max( iif( upper(s.mcode) = upper('port'), s.svalue , null ) )
# from settings s
# where ...
# into v_port ... ; <<< THIS WILL FAIL with 'conversion error from "None"'.
fb_port = 3050
if act_db_main.port:
fb_port = int(act_db_main.port) if act_db_main.port.isdigit() else fb_port
# Additional check: fb_port must be listening now:
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
s.connect(('localhost', fb_port))
# Must be EMPTY:
out_prep = capsys.readouterr().out
if out_prep:
# Some problem raised during establishing connections to master/replica DB
pass
else:
oltp_files = Path(act_db_main.files_dir / 'oltp-emul-ddl.zip')
with zipfile.ZipFile(oltp_files, 'r') as zip_ref:
zip_ref.extractall(tmp_oltp_build_sql.parents[0])
tmp_oltp_sql_files = [ Path(tmp_oltp_build_sql.parents[0]/x) for x in zip_ref.namelist() ]
sql_build_init = '\n'.join([ 'in ' + str(x) + ';' for x in tmp_oltp_sql_files[:5]])
#--------------------------------------------------------------------------------
with open(tmp_oltp_build_sql, 'w') as f:
f.write( sql_build_init )
f.write( generate_sync_settings_sql(db_info[act_db_main, 'db_full_path'], act_db_main.db.user, act_db_main.db.password, fb_port) )
#--------------------------------------------------------------------------------
oltp_post_files = tmp_oltp_sql_files[5:10] # 'oltp-emul-06_split_heavy_tabs.sql' ... 'oltp-emul-10_adjust_eds_perf.sql'
sql_build_post = ''
tmp_post_handling_lst = []
for f in oltp_post_files:
tmp_post_handling_sql = f.with_suffix('.tmp')
tmp_post_handling_sql.unlink(missing_ok = True)
tmp_post_handling_lst.append(tmp_post_handling_sql)
sql_build_post += f"""
out {tmp_post_handling_sql};
in {f};
out;
in {tmp_post_handling_sql};
"""
if 'adjust_eds_calls' in str(f):
# We have to make COMMIT here, otherwise get:
# Statement failed, SQLSTATE = 2F000
# Error while parsing procedure SP_PERF_EDS_LOGGING's BLR
# -attempted update of read-only column <unknown>
# After line ... in file ... oltp-emul-10_adjust_eds_perf.sql
#
sql_build_post += "\ncommit;\n"
with open(tmp_oltp_build_sql, 'a') as f:
f.write( sql_build_post )
oltp_final_files = tmp_oltp_sql_files[10:] # 'oltp-emul-11_ref_data_filling.sql', 'oltp-emul-12_activate_db_triggers.sql'
sql_build_final = '\n'.join( [ f'in {x};' for x in oltp_final_files] )
sql_completed = """
recreate table t_completed(id int primary key);
commit;
"""
with open(tmp_oltp_build_sql, 'a') as f:
f.write( sql_build_final )
f.write( sql_completed )
tmp_oltp_sql_files += tmp_post_handling_lst
act_db_main.isql(switches=['-q', '-nod'], input_file = str(tmp_oltp_build_sql), io_enc = locale.getpreferredencoding(), combine_output = True)
if act_db_main.return_code:
out_init= '\n'.join( ('act_db_main.return_code = %d' % act_db_main.return_code, act_db_main.clean_stdout ) )
act_db_main.reset()
if DEBUG_MODE:
pass
else:
for p in tmp_oltp_sql_files:
p.unlink(missing_ok = True)
repl_log_new = get_replication_log(act_db_main)
if out_init:
# Some problem raised during execution of initial SQL
pass
else:
# Query to be used for check that all DB objects present in replica (after last DML statement completed on master DB):
ddl_ready_query = "select 1 from rdb$relations where rdb$relation_name = upper('t_completed')"
# Query to be used that replica DB contains all expected data (after last DML statement completed on master DB):
isql_check_script = """
set list on;
set count on;
select
rdb$get_context('SYSTEM','REPLICA_MODE') replica_mode
,s.task
from semaphores s
where s.id = -1;
"""
isql_expected_out = f"""
REPLICA_MODE READ-ONLY
TASK all_build_ok
Records affected: 1
"""
##############################################################################
### W A I T U N T I L R E P L I C A B E C O M E S A C T U A L ###
##############################################################################
watch_replica( act_db_repl, MAX_TIME_FOR_WAIT_DATA_IN_REPLICA, ddl_ready_query, isql_check_script, isql_expected_out)
# Must be EMPTY:
out_main = capsys.readouterr().out
repl_log_new = get_replication_log(act_db_main)
if DEBUG_MODE:
pass
else:
drop_db_objects(act_db_main, act_db_repl, capsys)
# Must be EMPTY:
out_drop = capsys.readouterr().out
if [ x for x in (out_prep, out_init, out_main, out_drop) if x.strip() ]:
# We have a problem either with DDL/DML or with dropping DB objects.
# First, we have to RECREATE both master and slave databases
# (otherwise further execution of this test or other replication-related tests most likely will fail):
out_reset = reset_replication(act_db_main, act_db_repl, db_info[act_db_main,'db_full_path'], db_info[act_db_repl,'db_full_path'], cleanup_repl_dirs = not DEBUG_MODE)
# Next, we display out_main, out_drop and out_reset:
#
print('Problem(s) detected:')
if out_prep.strip():
print('out_prep:\n', out_prep)
if out_init.strip():
print('out_init:\n', out_init)
if out_main.strip():
print('out_main:\n', out_main)
if out_drop.strip():
print('out_drop:\n', out_drop)
if out_reset.strip():
print('out_reset:\n', out_reset)
# Finally, we have to show content of replication.log afte this test started:
print('Lines that did appear in replication.log during test run:')
for line in unified_diff(repl_log_old, repl_log_new):
if line.startswith('+') and line[2:].strip():
print(line.strip())
assert '' == capsys.readouterr().out
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