[test] Flake8-clean and use stdlib unittest in cubicweb/server/test/unittest_utils.py
.. -*- coding: utf-8 -*-.._cubicweb-ctl:``cubicweb-ctl`` tool=====================`cubicweb-ctl` is the swiss knife to manage *CubicWeb* instances.The general syntax is :: cubicweb-ctl <command> [options command] <arguments commands>To view available commands :: cubicweb-ctl cubicweb-ctl --helpPlease note that the commands available depends on the *CubicWeb* packagesand cubes that have been installed.To view the help menu on specific command :: cubicweb-ctl <command> --helpListing available cubes and instance-------------------------------------*``list``, provides a list of the available configuration, cubes and instances.Creation of a new cube-----------------------Create your new cube cube :: cubicweb-ctl newcube -d <target directory>This will create a new cube ``<target directory>``.Create an instance-------------------You must ensure `~/etc/cubicweb.d/` exists prior to this. On windows, the'~' part will probably expand to 'Documents and Settings/user'.To create an instance from an existing cube, execute the followingcommand :: cubicweb-ctl create <cube_name> <instance_name>This command will create the configuration files of an instance in``~/etc/cubicweb.d/<instance_name>``.The tool ``cubicweb-ctl`` executes the command ``db-create`` and``db-init`` when you run ``create`` so that you can complete aninstance creation in a single command. But of course it is possibleto issue these separate commands separately, at a later stage.Command to create/initialize an instance database-------------------------------------------------*``db-create``, creates the system database of an instance (tables and extensions only)*``db-init``, initializes the system database of an instance (schema, groups, users, workflows...)Commands to control instances-----------------------------*``start``, starts one or more or all instancesof special interest:: start -Dwill start in debug mode (under windows, starting without -D will notwork; you need instead to setup your instance as a service).*``stop``, stops one or more or all instances*``restart``, restarts one or more or all instances*``status``, returns the status of the instance(s)Commands to maintain instances------------------------------*``upgrade``, launches the existing instances migration when a new version of *CubicWeb* or the cubes installed is available*``shell``, opens a (Python based) migration shell for manual maintenance of the instance*``db-dump``, creates a dump of the system database*``db-restore``, restores a dump of the system database*``db-check``, checks data integrity of an instance. If the automatic correction is activated, it is recommanded to create a dump before this operation.*``schema-sync``, synchronizes the persistent schema of an instance with the instance schema. It is recommanded to create a dump before this operation.Commands to maintain i18n catalogs----------------------------------*``i18ncubicweb``, regenerates messages catalogs of the *CubicWeb* library*``i18ncube``, regenerates the messages catalogs of a cube*``i18ninstance``, recompiles the messages catalogs of an instance. This is automatically done while upgrading.See also chapter :ref:`internationalization`.Other commands--------------*``delete``, deletes an instance (configuration files and database)