Ticket 47808 - CI test: add test case for ticket 47808

Bug Description: If be_txn plugin fails in ldbm_back_add, adding entry
                 is double freed.

Test Description:
  It enables attribute uniqueness plugin with sn as a unique attribute
  Add an entry 1 with sn = ENTRY_NAME
  Add an entry 2 with sn = ENTRY_NAME
  If the second add does not crash the server and the following search
  found none, the bug is fixed.

https://fedorahosted.org/389/ticket/47808

dirsrvtests/tickets/ticket47313_test.py

@@ -196,6 +196,9 @@ def test_ticket47313_run(topology):
     topology.standalone.delete_s(entry_dn_en_only)
 
 def test_ticket47313_final(topology):
+    mod = [(ldap.MOD_REPLACE, 'nsslapd-errorlog-level', '0')]
+    topology.standalone.modify_s(DN_CONFIG, mod)
+    
     topology.standalone.stop(timeout=10)
     
 def run_isolated():

dirsrvtests/tickets/ticket47808_test.py

@@ -0,0 +1,212 @@
+import os
+import sys
+import time
+import ldap
+import logging
+import socket
+import time
+import logging
+import pytest
+from lib389 import DirSrv, Entry, tools
+from lib389.tools import DirSrvTools
+from lib389._constants import *
+from lib389.properties import *
+from constants import *
+
+log = logging.getLogger(__name__)
+
+installation_prefix = '/home/nhosoi/install'
+
+ATTRIBUTE_UNIQUENESS_PLUGIN = 'cn=attribute uniqueness,cn=plugins,cn=config'
+ENTRY_NAME = 'test_entry'
+    
+
+class TopologyStandalone(object):
+    def __init__(self, standalone):
+        standalone.open()
+        self.standalone = standalone
+
+
+#@pytest.fixture(scope="module")
+def topology(request):
+    '''
+        This fixture is used to standalone topology for the 'module'.
+        At the beginning, It may exists a standalone instance.
+        It may also exists a backup for the standalone instance.
+    
+        Principle:
+            If standalone instance exists:
+                restart it
+            If backup of standalone exists:
+                create/rebind to standalone
+
+                restore standalone instance from backup
+            else:
+                Cleanup everything
+                    remove instance
+                    remove backup
+                Create instance
+                Create backup
+    '''
+    global installation_prefix
+
+    if installation_prefix:
+        args_instance[SER_DEPLOYED_DIR] = installation_prefix
+    
+    standalone = DirSrv(verbose=True)
+    
+    # Args for the standalone instance
+    args_instance[SER_HOST] = HOST_STANDALONE
+    args_instance[SER_PORT] = PORT_STANDALONE
+    args_instance[SER_SERVERID_PROP] = SERVERID_STANDALONE
+    args_standalone = args_instance.copy()
+    standalone.allocate(args_standalone)
+        
+    # Get the status of the backups
+    backup_standalone = standalone.checkBackupFS()
+    
+    # Get the status of the instance and restart it if it exists
+    instance_standalone   = standalone.exists()
+    if instance_standalone:
+        # assuming the instance is already stopped, just wait 5 sec max
+        standalone.stop(timeout=5)
+        standalone.start(timeout=10)
+    
+    if backup_standalone:
+        # The backup exist, assuming it is correct 
+        # we just re-init the instance with it
+        if not instance_standalone:
+            standalone.create()
+            # Used to retrieve configuration information (dbdir, confdir...)
+            standalone.open()
+        
+        # restore standalone instance from backup
+        standalone.stop(timeout=10)
+        standalone.restoreFS(backup_standalone)
+        standalone.start(timeout=10)
+        
+    else:
+        # We should be here only in two conditions
+        #      - This is the first time a test involve standalone instance
+        #      - Something weird happened (instance/backup destroyed)
+        #        so we discard everything and recreate all
+        
+        # Remove the backup. So even if we have a specific backup file
+        # (e.g backup_standalone) we clear backup that an instance may have created
+        if backup_standalone:
+            standalone.clearBackupFS()
+        
+        # Remove the instance
+        if instance_standalone:
+            standalone.delete()
+            
+        # Create the instance
+        standalone.create()
+        
+        # Used to retrieve configuration information (dbdir, confdir...)
+        standalone.open()
+                
+        # Time to create the backups
+        standalone.stop(timeout=10)
+        standalone.backupfile = standalone.backupFS()
+        standalone.start(timeout=10)
+    
+    # 
+    # Here we have standalone instance up and running
+    # Either coming from a backup recovery
+    # or from a fresh (re)init
+    # Time to return the topology
+    return TopologyStandalone(standalone)
+
+
+def test_ticket47808_run(topology):
+    """
+        It enables attribute uniqueness plugin with sn as a unique attribute
+        Add an entry 1 with sn = ENTRY_NAME
+        Add an entry 2 with sn = ENTRY_NAME
+        If the second add does not crash the server and the following search found none,
+        the bug is fixed.
+    """
+        
+    # bind as directory manager
+    topology.standalone.log.info("Bind as %s" % DN_DM)
+    topology.standalone.simple_bind_s(DN_DM, PASSWORD)
+    
+    topology.standalone.log.info("\n\n######################### SETUP ATTR UNIQ PLUGIN ######################\n")
+
+    # enable attribute uniqueness plugin
+    mod = [(ldap.MOD_REPLACE, 'nsslapd-pluginEnabled', 'on'), (ldap.MOD_REPLACE, 'nsslapd-pluginarg0', 'sn'), (ldap.MOD_REPLACE, 'nsslapd-pluginarg1', SUFFIX)]
+    topology.standalone.modify_s(ATTRIBUTE_UNIQUENESS_PLUGIN, mod)
+    
+    topology.standalone.log.info("\n\n######################### ADD USER 1 ######################\n")
+    
+    # Prepare entry 1
+    entry_name = '%s 1' % (ENTRY_NAME)
+    entry_dn_1 = 'cn=%s, %s' % (entry_name, SUFFIX)
+    entry_1 = Entry(entry_dn_1)
+    entry_1.setValues('objectclass', 'top', 'person')
+    entry_1.setValues('sn', ENTRY_NAME)
+    entry_1.setValues('cn', entry_name)
+    topology.standalone.log.info("Try to add Add %s: %r" % (entry_1, entry_1))
+    topology.standalone.add_s(entry_1)
+
+    topology.standalone.log.info("\n\n######################### Restart Server ######################\n")
+    topology.standalone.stop(timeout=10)
+    topology.standalone.start(timeout=10)
+    
+    topology.standalone.log.info("\n\n######################### ADD USER 2 ######################\n")
+    
+    # Prepare entry 2 having the same sn, which crashes the server 
+    entry_name = '%s 2' % (ENTRY_NAME)
+    entry_dn_2 = 'cn=%s, %s' % (entry_name, SUFFIX)
+    entry_2 = Entry(entry_dn_2)
+    entry_2.setValues('objectclass', 'top', 'person')
+    entry_2.setValues('sn', ENTRY_NAME)
+    entry_2.setValues('cn', entry_name)
+    topology.standalone.log.info("Try to add Add %s: %r" % (entry_2, entry_2))
+    try:
+      topology.standalone.add_s(entry_2)
+    except:
+      topology.standalone.log.warn("Adding %s failed" % entry_dn_2)
+      pass
+
+    topology.standalone.log.info("\n\n######################### IS SERVER UP? ######################\n")
+    ents = topology.standalone.search_s(entry_dn_1, ldap.SCOPE_BASE, '(objectclass=*)')
+    assert len(ents) == 1
+    topology.standalone.log.info("Yes, it's up.")
+
+    topology.standalone.log.info("\n\n######################### CHECK USER 2 NOT ADDED ######################\n")
+    topology.standalone.log.info("Try to search %s" % entry_dn_2)
+    try:
+        ents = topology.standalone.search_s(entry_dn_2, ldap.SCOPE_BASE, '(objectclass=*)')
+    except ldap.NO_SUCH_OBJECT:
+        topology.standalone.log.info("Found none")
+    
+    topology.standalone.log.info("\n\n######################### DELETE USER 1 ######################\n")
+    
+    topology.standalone.log.info("Try to delete  %s " % entry_dn_1)
+    topology.standalone.delete_s(entry_dn_1)
+    
+def test_ticket47808_final(topology):
+    topology.standalone.stop(timeout=10)
+    
+def run_isolated():
+    '''
+        run_isolated is used to run these test cases independently of a test scheduler (xunit, py.test..)
+        To run isolated without py.test, you need to 
+            - edit this file and comment '@pytest.fixture' line before 'topology' function.
+            - set the installation prefix
+            - run this program
+    '''
+    global installation_prefix
+    installation_prefix = '/home/nhosoi/install'
+        
+    topo = topology(True)
+    test_ticket47808_run(topo)
+    
+    test_ticket47808_final(topo)
+
+
+if __name__ == '__main__':
+    run_isolated()
+