[test] New Handling of database for test. This patch adds a new TestDataBaseHandler class. TestDataBaseHandler are in charge of Setup, backup, restore, connection, repository caching and cleanup for database used during the test. TestDataBaseHandler reuse code and logic previously found in cubicweb.devtools functions and devtools.testlib.CubicwebTC. TestDataBaseHandler is an abstract class and must be subclassed to implement functionalities specific to each driver. TestDataBaseHandler can store and restore various database setups. devtools.testlib.CubicwebTC gains a test_db_id class attribute to specify that its TestCase uses a specific database that should be cached. The pre_setup_database class method is used to setup the database that will be cached. The setup_database method is kept uncached. The same TestDataBaseHandler are reused for every test using the same config object. TestDataBaseHandler try to reuse Repository objects as much as possible. All cubicweb test have been updated.

from base64 import b64decode, b64encode
try:
    uri, newdn = __args__
except ValueError:
    print 'USAGE: cubicweb-ctl shell <instance> ldap_change_base_dn.py -- <ldap source uri> <new dn>'
    print
    print 'you should not have updated your sources file yet'

olddn = repo.config.sources()[uri]['user-base-dn']

assert olddn != newdn

raw_input("Ensure you've stopped the instance, type enter when done.")

for eid, extid in sql("SELECT eid, extid FROM entities WHERE source='%s'" % uri):
    olduserdn = b64decode(extid)
    newuserdn = olduserdn.replace(olddn, newdn)
    if newuserdn != olduserdn:
        print olduserdn, '->', newuserdn
        sql("UPDATE entities SET extid='%s' WHERE eid=%s" % (b64encode(newuserdn), eid))

commit()

print 'you can now update the sources file to the new dn and restart the instance'