[master] Merge branch 'trac2883'

src/bin/xfrin/tests/xfrin_test.py

@@ -300,7 +300,8 @@ class MockXfrinConnection(XfrinConnection):
     def __init__(self, sock_map, zone_name, rrclass, datasrc_client,
                  shutdown_event, master_addr, tsig_key=None):
         super().__init__(sock_map, zone_name, rrclass, MockDataSourceClient(),
-                         shutdown_event, master_addr, begin_soa_rrset)
+                         shutdown_event, master_addr, begin_soa_rrset,
+                         xfrin.Counters(xfrin.SPECFILE_LOCATION))
         self.query_data = b''
         self.reply_data = b''
         self.force_time_out = False
@@ -2129,8 +2130,6 @@ class TestStatisticsXfrinConn(TestXfrinConnection):
     and methods related to statistics tests'''
     def setUp(self):
         super().setUp()
-        # clear all statistics counters before each test
-        self.conn._counters.clear_all()
         # fake datetime
         self.__orig_datetime = isc.statistics.counters.datetime
         self.__orig_start_timer = isc.statistics.counters._start_timer
@@ -3198,7 +3197,9 @@ class TestXfrinProcess(unittest.TestCase):
         xfrin.process_xfrin(self, XfrinRecorder(), Name("example.org."),
                             RRClass.IN, None, zone_soa, None,
                             TEST_MASTER_IPV4_ADDRINFO, True, None,
-                            request_ixfr, self.__get_connection)
+                            request_ixfr,
+                            xfrin.Counters(xfrin.SPECFILE_LOCATION),
+                            self.__get_connection)
         self.assertEqual([], self.__rets)
         self.assertEqual(transfers, self.__transfers)
         # Create a connection for each attempt

src/bin/xfrin/xfrin.py.in

@@ -563,8 +563,8 @@ class XfrinConnection(asyncore.dispatcher):
 
     def __init__(self,
                  sock_map, zone_name, rrclass, datasrc_client,
-                 shutdown_event, master_addrinfo, zone_soa, tsig_key=None,
-                 idle_timeout=60):
+                 shutdown_event, master_addrinfo, zone_soa, counters,
+                 tsig_key=None, idle_timeout=60):
         """Constructor of the XfirnConnection class.
 
         Parameters:
@@ -579,6 +579,7 @@ class XfrinConnection(asyncore.dispatcher):
             address and port of the master server.
           zone_soa (RRset or None): SOA RRset of zone's current SOA or None
             if it's not available.
+          counters (Counters): used for statistics counters
           idle_timeout (int): max idle time for read data from socket.
 
         """
@@ -617,7 +618,7 @@ class XfrinConnection(asyncore.dispatcher):
         # keep a record of this specific transfer to log on success
         # (time, rr/s, etc)
         self._transfer_stats = XfrinTransferStats()
-        self._counters = Counters(SPECFILE_LOCATION)
+        self._counters = counters
 
     def init_socket(self):
         '''Initialize the underlyig socket.
@@ -1107,7 +1108,7 @@ def __get_initial_xfr_type(zone_soa, request_ixfr, zname, zclass, master_addr):
 
 def __process_xfrin(server, zone_name, rrclass, datasrc_client, zone_soa,
                     shutdown_event, master_addrinfo, check_soa, tsig_key,
-                    request_ixfr, conn_class):
+                    request_ixfr, counters, conn_class):
     conn = None
     exception = None
     ret = XFRIN_FAIL
@@ -1131,7 +1132,7 @@ def __process_xfrin(server, zone_name, rrclass, datasrc_client, zone_soa,
             retry = False
             conn = conn_class(sock_map, zone_name, rrclass, datasrc_client,
                               shutdown_event, master_addrinfo, zone_soa,
-                              tsig_key)
+                              counters, tsig_key)
             conn.init_socket()
             ret = XFRIN_FAIL
             if conn.connect_to_master():
@@ -1178,7 +1179,7 @@ def __process_xfrin(server, zone_name, rrclass, datasrc_client, zone_soa,
 
 def process_xfrin(server, xfrin_recorder, zone_name, rrclass, datasrc_client,
                   zone_soa, shutdown_event, master_addrinfo, check_soa,
-                  tsig_key, request_ixfr, conn_class=XfrinConnection):
+                  tsig_key, request_ixfr, counters, conn_class=XfrinConnection):
     # Even if it should be rare, the main process of xfrin session can
     # raise an exception.  In order to make sure the lock in xfrin_recorder
     # is released in any cases, we delegate the main part to the helper
@@ -1188,7 +1189,7 @@ def process_xfrin(server, xfrin_recorder, zone_name, rrclass, datasrc_client,
     try:
         __process_xfrin(server, zone_name, rrclass, datasrc_client, zone_soa,
                         shutdown_event, master_addrinfo, check_soa, tsig_key,
-                        request_ixfr, conn_class)
+                        request_ixfr, counters, conn_class)
     except Exception as ex:
         # don't log it until we complete decrement().
         exception = ex
@@ -1753,7 +1754,8 @@ class Xfrin:
                                               datasrc_client, zone_soa,
                                               self._shutdown_event,
                                               master_addrinfo, check_soa,
-                                              tsig_key, request_ixfr))
+                                              tsig_key, request_ixfr,
+                                              self._counters))
 
         xfrin_thread.start()
         return (0, 'zone xfrin is started')

src/bin/xfrout/tests/xfrout_test.py.in

@@ -309,7 +309,8 @@ class TestXfroutSessionBase(unittest.TestCase):
                                        # When not testing ACLs, simply accept
                                        isc.acl.dns.REQUEST_LOADER.load(
                                            [{"action": "ACCEPT"}]),
-                                       {})
+                                       {},
+                                       xfrout.Counters(xfrout.SPECFILE_LOCATION))
         self.set_request_type(RRType.AXFR) # test AXFR by default
         self.mdata = self.create_request_data()
         self.soa_rrset = create_soa(SOA_CURRENT_VERSION)
@@ -1323,7 +1324,8 @@ class TestUnixSockServer(unittest.TestCase):
             # This would be the handler class, but we just check it is passed
             # the right parametes, so function is enough for that.
             keys = isc.server_common.tsig_keyring.get_keyring()
-            def handler(sock, data, server, keyring, address, acl, config):
+            def handler(sock, data, server, keyring, address, acl, config,
+                        counters):
                 self.assertEqual("sock", sock)
                 self.assertEqual("data", data)
                 self.assertEqual(self.unix, server)
@@ -1331,6 +1333,7 @@ class TestUnixSockServer(unittest.TestCase):
                 self.assertEqual("Address", address)
                 self.assertEqual("acl", acl)
                 self.assertEqual("Zone config", config)
+                self.assertIs(self.unix._counters, counters)
             self.unix.RequestHandlerClass = handler
             self.unix.finish_request("sock", "data")
         finally:
@@ -1629,7 +1632,9 @@ class TestUnixSockServerForCounter(unittest.TestCase):
         xfrout.ThreadingUnixStreamServer = DummySocketserver
         xfrout.super = lambda : DummySocketserver()
         xfrout.select.select = lambda x,y,z: ([None],[None],[None])
-        self.unix = UnixSockServer(None, None, threading.Event(), None, None)
+        self._counters = xfrout.Counters(xfrout.SPECFILE_LOCATION)
+        self.unix = UnixSockServer(None, None, threading.Event(), None, None,
+                                   self._counters)
 
     def tearDown(self):
         ( UnixSockServer._remove_unused_sock_file,
@@ -1659,7 +1664,8 @@ class TestUnixSockServerForCounter(unittest.TestCase):
                           'socket', 'unixdomain', 'openfail')
         xfrout.ThreadingUnixStreamServer = DummySocketserverException
         try:
-            self.unix = UnixSockServer(None, None, None, None, None)
+            self.unix = UnixSockServer(None, None, None, None, None,
+                                       self._counters)
         except Exception:
             pass
         else:
@@ -1700,7 +1706,7 @@ class TestUnixSockServerForCounter(unittest.TestCase):
                           self.unix._counters.get,
                           'socket', 'unixdomain', 'acceptfail')
         xfrout.super = lambda : DummyClassException()
-        self.unix = UnixSockServer(None, None, None, None, None)
+        self.unix = UnixSockServer(None, None, None, None, None, self._counters)
         self.assertRaises(Exception, self.unix.get_request)
         self.assertEqual(
             self.unix._counters.get('socket', 'unixdomain', 'acceptfail'), 1)

src/bin/xfrout/xfrout.py.in

@@ -176,7 +176,8 @@ def make_blocking(filenum, on):
 
 class XfroutSession():
     def __init__(self, sock_fd, request_data, server, tsig_key_ring, remote,
-                 default_acl, zone_config, client_class=DataSourceClient):
+                 default_acl, zone_config, counters,
+                 client_class=DataSourceClient):
         self._sock_fd = sock_fd
         self._request_data = request_data
         self._server = server
@@ -193,7 +194,7 @@ class XfroutSession():
         self._jnl_reader = None # will be set to a reader for IXFR
         # Creation of self.counters should be done before of
         # invoking self._handle()
-        self._counters = Counters(SPECFILE_LOCATION)
+        self._counters = counters
         self._handle()
 
     def create_tsig_ctx(self, tsig_record, tsig_key_ring):
@@ -683,11 +684,11 @@ class UnixSockServer(socketserver_mixin.NoPollMixIn,
     '''The unix domain socket server which accept xfr query sent from auth server.'''
 
     def __init__(self, sock_file, handle_class, shutdown_event, config_data,
-                 cc):
+                 cc, counters):
         self._remove_unused_sock_file(sock_file)
         self._sock_file = sock_file
         socketserver_mixin.NoPollMixIn.__init__(self)
-        self._counters = Counters(SPECFILE_LOCATION)
+        self._counters = counters
         try:
             ThreadingUnixStreamServer.__init__(self, sock_file, \
                                                    handle_class)
@@ -886,7 +887,8 @@ class UnixSockServer(socketserver_mixin.NoPollMixIn,
         self._lock.release()
         self.RequestHandlerClass(sock_fd, request_data, self,
                                  isc.server_common.tsig_keyring.get_keyring(),
-                                 self._guess_remote(sock_fd), acl, zone_config)
+                                 self._guess_remote(sock_fd), acl, zone_config,
+                                 self._counters)
 
     def _remove_unused_sock_file(self, sock_file):
         '''Try to remove the socket file. If the file is being used
@@ -1025,12 +1027,12 @@ class XfroutServer:
         self._shutdown_event = threading.Event()
         self._cc = isc.config.ModuleCCSession(SPECFILE_LOCATION, self.config_handler, self.command_handler)
         self._config_data = self._cc.get_full_config()
+        self._counters = Counters(SPECFILE_LOCATION)
         self._cc.start()
         self._cc.add_remote_config(AUTH_SPECFILE_LOCATION)
         isc.server_common.tsig_keyring.init_keyring(self._cc)
         self._start_xfr_query_listener()
         self._start_notifier()
-        self._counters = Counters(SPECFILE_LOCATION)
 
     def _start_xfr_query_listener(self):
         '''Start a new thread to accept xfr query. '''
@@ -1039,13 +1041,13 @@ class XfroutServer:
             XfroutSession,
             self._shutdown_event,
             self._config_data,
-            self._cc)
+            self._cc, self._counters)
         listener = threading.Thread(target=self._unix_socket_server.serve_forever)
         listener.start()
 
     def _start_notifier(self):
         datasrc = self._unix_socket_server.get_db_file()
-        self._notifier = notify_out.NotifyOut(datasrc)
+        self._notifier = notify_out.NotifyOut(datasrc, counters=self._counters)
         if 'also_notify' in self._config_data:
             for slave in self._config_data['also_notify']:
                 address = self._default_notify_address

src/lib/python/isc/notify/notify_out.py

@@ -128,7 +128,7 @@ class NotifyOut:
     notify message to its slaves). notify service can be started by
     calling  dispatcher(), and it can be stopped by calling shutdown()
     in another thread. '''
-    def __init__(self, datasrc_file, verbose=True):
+    def __init__(self, datasrc_file, counters=None, verbose=True):
         self._notify_infos = {} # key is (zone_name, zone_class)
         self._waiting_zones = []
         self._notifying_zones = []
@@ -143,7 +143,7 @@ class NotifyOut:
         # Use nonblock event to eliminate busy loop
         # If there are no notifying zones, clear the event bit and wait.
         self._nonblock_event = threading.Event()
-        self._counters = Counters()
+        self._counters = counters
 
     def _init_notify_out(self, datasrc_file):
         '''Get all the zones name and its notify target's address.
@@ -508,16 +508,17 @@ class NotifyOut:
             sock = zone_notify_info.create_socket(addrinfo[0])
             sock.sendto(render.get_data(), 0, addrinfo)
             # count notifying by IPv4 or IPv6 for statistics
-            if zone_notify_info.get_socket().family == socket.AF_INET:
-                self._counters.inc('zones',
-                                   zone_notify_info.zone_class,
-                                   zone_notify_info.zone_name,
-                                  'notifyoutv4')
-            elif zone_notify_info.get_socket().family == socket.AF_INET6:
-                self._counters.inc('zones',
-                                   zone_notify_info.zone_class,
-                                   zone_notify_info.zone_name,
-                                  'notifyoutv6')
+            if self._counters is not None:
+                if zone_notify_info.get_socket().family == socket.AF_INET:
+                    self._counters.inc('zones',
+                                       zone_notify_info.zone_class,
+                                       zone_notify_info.zone_name,
+                                      'notifyoutv4')
+                elif zone_notify_info.get_socket().family == socket.AF_INET6:
+                    self._counters.inc('zones',
+                                       zone_notify_info.zone_class,
+                                       zone_notify_info.zone_name,
+                                      'notifyoutv6')
             logger.info(NOTIFY_OUT_SENDING_NOTIFY, AddressFormatter(addrinfo))
         except (socket.error, addr.InvalidAddress) as err:
             logger.error(NOTIFY_OUT_SOCKET_ERROR, AddressFormatter(addrinfo),

src/lib/python/isc/notify/tests/Makefile.am

@@ -5,7 +5,7 @@ EXTRA_DIST += testdata/test.sqlite3 testdata/brokentest.sqlite3
 # The rest of the files are actually not necessary, but added for reference
 EXTRA_DIST += testdata/example.com testdata/example.net
 EXTRA_DIST += testdata/nons.example testdata/nosoa.example
-EXTRA_DIST += testdata/multisoa.example
+EXTRA_DIST += testdata/multisoa.example testdata/test_spec1.spec
 
 # If necessary (rare cases), explicitly specify paths to dynamic libraries
 # required by loadable python modules.

src/lib/python/isc/notify/tests/notify_out_test.py

@@ -22,8 +22,10 @@ import socket
 from isc.notify import notify_out, SOCK_DATA
 import isc.log
 from isc.dns import *
+from isc.statistics.dns import Counters
 
 TESTDATA_SRCDIR = os.getenv("TESTDATASRCDIR")
+SPECFILE_LOCATION = TESTDATA_SRCDIR + os.sep + 'test_spec1.spec'
 
 def get_notify_msgdata(zone_name, qid=0):
     """A helper function to generate a notify response in wire format.
@@ -128,7 +130,7 @@ class TestZoneNotifyInfo(unittest.TestCase):
 class TestNotifyOut(unittest.TestCase):
     def setUp(self):
         self._db_file = TESTDATA_SRCDIR + '/test.sqlite3'
-        self._notify = notify_out.NotifyOut(self._db_file)
+        self._notify = notify_out.NotifyOut(self._db_file, counters=Counters(SPECFILE_LOCATION))
         self._notify._notify_infos[('example.com.', 'IN')] = MockZoneNotifyInfo('example.com.', 'IN')
         self._notify._notify_infos[('example.com.', 'CH')] = MockZoneNotifyInfo('example.com.', 'CH')
         self._notify._notify_infos[('example.net.', 'IN')] = MockZoneNotifyInfo('example.net.', 'IN')

src/lib/python/isc/notify/tests/testdata/test_spec1.spec

+{
+  "module_spec": {
+    "module_name": "NotifyOutLike",
+    "module_description": "Test notifier",
+    "config_data": [],
+    "commands": [],
+    "statistics": [
+      {
+        "item_name": "zones",
+        "item_type": "named_set",
+        "item_optional": false,
+        "item_default": {
+          "_SERVER_" : {
+            "notifyoutv4" : 0,
+            "notifyoutv6" : 0
+          }
+        },
+        "item_title": "Zone names",
+        "item_description": "Zone names",
+        "named_set_item_spec": {
+          "item_name": "classname",
+          "item_type": "named_set",
+          "item_optional": false,
+          "item_default": {},
+          "item_title": "RR class name",
+          "item_description": "RR class name",
+          "named_set_item_spec": {
+            "item_name": "zonename",
+            "item_type": "map",
+            "item_optional": false,
+            "item_default": {},
+            "item_title": "Zone name",
+            "item_description": "Zone name",
+            "map_item_spec": [
+              {
+                "item_name": "notifyoutv4",
+                "item_type": "integer",
+                "item_optional": false,
+                "item_default": 0,
+                "item_title": "IPv4 notifies",
+                "item_description": "Number of IPv4 notifies per zone name sent out"
+              },
+              {
+                "item_name": "notifyoutv6",
+                "item_type": "integer",
+                "item_optional": false,
+                "item_default": 0,
+                "item_title": "IPv6 notifies",
+                "item_description": "Number of IPv6 notifies per zone name sent out"
+              }
+            ]
+          }
+        }
+      }
+    ]
+  }
+}

src/lib/python/isc/statistics/counters.py

@@ -151,15 +151,6 @@ def _concat(*args, sep='/'):
     """
     return sep.join(args)
 
-class _Statistics():
-    """Statistics data set. This class will be remove in the future
-    release."""
-    # default statistics data
-    _data = {}
-    # default statistics spec used in case the specfile is omitted when
-    # constructing a Counters() object
-    _spec = []
-
 class Counters():
     """A class for holding and manipulating all statistics counters
     for a module.  A Counters object may be created by specifying a spec
@@ -174,32 +165,25 @@ class Counters():
     timers can be temporarily disabled.  If disabled, counter values are
     not changed even if methods to update them are invoked."""
 
-    # default statistics data set
-    _statistics = _Statistics()
-
-    def __init__(self, spec_file_name=None):
+    def __init__(self, spec_file_name):
         """A constructor for the Counters class. A path to the spec file
-        can be specified in spec_file_name. Statistics data based on
-        statistics spec can be accumulated if spec_file_name is
-        specified. If omitted, a default statistics spec is used. The
-        default statistics spec is defined in a hidden class named
-        _Statistics(). But the hidden class won't be used and
-        spec_file_name will be required in the future release.
+        can be specified in spec_file_name, which is required. Statistics data
+        based on statistics spec can be accumulated. If an invalid argument
+        including None is specified, ModuleSpecError might be raised.
         """
         self._zones_item_list = []
         self._start_time = {}
         self._disabled = False
         self._rlock = threading.RLock()
-        if not spec_file_name: return
-        # change the default statistics spec
-        self._statistics._spec = \
+        self._statistics_data = {}
+        self._statistics_spec = \
             isc.config.module_spec_from_file(spec_file_name).\
             get_statistics_spec()
 
     def clear_all(self):
         """clears all statistics data"""
         with self._rlock:
-            self._statistics._data = {}
+            self._statistics_data = {}
 
     def disable(self):
         """disables incrementing/decrementing counters"""
@@ -219,8 +203,8 @@ class Counters():
         identifier = _concat(*args)
         with self._rlock:
             if self._disabled: return
-            _inc_counter(self._statistics._data,
-                         self._statistics._spec,
+            _inc_counter(self._statistics_data,
+                         self._statistics_spec,
                          identifier, step)
 
     def inc(self, *args):
@@ -240,7 +224,7 @@ class Counters():
         of the specified counter.  isc.cc.data.DataNotFoundError is
         raised when the counter doesn't have a number yet."""
         identifier = _concat(*args)
-        return _get_counter(self._statistics._data, identifier)
+        return _get_counter(self._statistics_data, identifier)
 
     def start_timer(self, *args):
         """Starts a timer which is identified by args and keeps it
@@ -271,8 +255,8 @@ class Counters():
             # set the end time
             _stop_timer(
                 start_time,
-                self._statistics._data,
-                self._statistics._spec,
+                self._statistics_data,
+                self._statistics_spec,
                 identifier)
             # A datetime value of once used timer should be deleted
             # for a future use.
@@ -293,5 +277,5 @@ class Counters():
         stats module, including each counter. If nothing is counted
         yet, then it returns an empty dictionary."""
         # entire copy
-        statistics_data = self._statistics._data.copy()
+        statistics_data = self._statistics_data.copy()
         return statistics_data

src/lib/python/isc/statistics/dns.py

@@ -69,63 +69,6 @@ documentation for isc.statistics.counters for details."""
 import isc.config
 from isc.statistics import counters
 
-class _Statistics():
-    """Statistics data set. This class will be removed in the future
-    release."""
-    # default statistics data
-    _data = {}
-    # default statistics spec used in case the specfile is omitted when
-    # constructing a Counters() object
-    _spec = [
-      {
-        "item_name": "zones",
-        "item_type": "named_set",
-        "item_optional": False,
-        "item_default": {
-          "_SERVER_" : {
-            "notifyoutv4" : 0,
-            "notifyoutv6" : 0
-          }
-        },
-        "item_title": "Zone names",
-        "item_description": "Zone names",
-        "named_set_item_spec": {
-          "item_name": "classname",
-          "item_type": "named_set",
-          "item_optional": False,
-          "item_default": {},
-          "item_title": "RR class name",
-          "item_description": "RR class name",
-          "named_set_item_spec": {
-            "item_name": "zonename",
-            "item_type": "map",
-            "item_optional": False,
-            "item_default": {},
-            "item_title": "Zone name",
-            "item_description": "Zone name",
-            "map_item_spec": [
-              {
-                "item_name": "notifyoutv4",
-                "item_type": "integer",
-                "item_optional": False,
-                "item_default": 0,
-                "item_title": "IPv4 notifies",
-                "item_description": "Number of IPv4 notifies per zone name sent out"
-              },
-              {
-                "item_name": "notifyoutv6",
-                "item_type": "integer",
-                "item_optional": False,
-                "item_default": 0,
-                "item_title": "IPv6 notifies",
-                "item_description": "Number of IPv6 notifies per zone name sent out"
-              }
-            ]
-          }
-        }
-      }
-    ]
-
 class Counters(counters.Counters):
     """A list of counters which can be handled in the class are like
     the following. Also see documentation for
@@ -176,20 +119,18 @@ class Counters(counters.Counters):
     _entire_server = '_SERVER_'
     # zone names are contained under this dirname in the spec file.
     _perzone_prefix = 'zones'
-    # default statistics data set
-    _statistics = _Statistics()
 
-    def __init__(self, spec_file_name=None):
+    def __init__(self, spec_file_name):
         """If the item `zones` is defined in the spec file, it obtains a
         list of counter names under it when initiating.  For behaviors
         other than this, see documentation for
         isc.statistics.counters.Counters.__init__()"""
         counters.Counters.__init__(self, spec_file_name)
         if self._perzone_prefix in \
-                isc.config.spec_name_list(self._statistics._spec):
+                isc.config.spec_name_list(self._statistics_spec):
             self._zones_item_list = isc.config.spec_name_list(
                 isc.config.find_spec_part(
-                    self._statistics._spec,
+                    self._statistics_spec,
                     '%s/%s/%s' % (self._perzone_prefix,
                                   '_CLASS_', self._entire_server)))
 
@@ -199,7 +140,7 @@ class Counters(counters.Counters):
         counter. If nothing is counted yet, then it returns an empty
         dictionary."""
         # entire copy
-        statistics_data = self._statistics._data.copy()
+        statistics_data = self._statistics_data.copy()
         # If there is no 'zones' found in statistics_data,
         # i.e. statistics_data contains no per-zone counter, it just
         # returns statistics_data because calculating total counts
@@ -208,7 +149,7 @@ class Counters(counters.Counters):
             return statistics_data
         zones = statistics_data[self._perzone_prefix]
         # Start calculation for '_SERVER_' counts
-        zones_spec = isc.config.find_spec_part(self._statistics._spec,
+        zones_spec = isc.config.find_spec_part(self._statistics_spec,
                                                self._perzone_prefix)
         zones_data = {}
         for cls in zones.keys():

src/lib/python/isc/statistics/tests/counters_test.py

@@ -49,12 +49,8 @@ class TestBasicMethods(unittest.TestCase):
     TEST_SPECFILE_LOCATION = TESTDATA_SRCDIR + os.sep + 'test_spec1.spec'
 
     def setUp(self):
-        imp.reload(counters)
         self.counters = counters.Counters(self.TEST_SPECFILE_LOCATION)
 
-    def tearDown(self):
-        self.counters.clear_all()
-
     def test_clear_counters(self):
         self.assertRaises(isc.cc.data.DataNotFoundError,
                           self.counters.get, 'counter')
@@ -131,15 +127,15 @@ class TestBasicMethods(unittest.TestCase):
         start_functor(concurrency, number, self.counters.inc,
                       counter_name)
         counters._stop_timer(start_time,
-                            self.counters._statistics._data,
-                            self.counters._statistics._spec,
+                            self.counters._statistics_data,
+                            self.counters._statistics_spec,
                             timer_name)
         self.assertEqual(
-            counters._get_counter(self.counters._statistics._data,
+            counters._get_counter(self.counters._statistics_data,
                                  counter_name),
             concurrency * number)
         self.assertGreaterEqual(
-            counters._get_counter(self.counters._statistics._data,
+            counters._get_counter(self.counters._statistics_data,
                                  timer_name), 0.0)
 
     def test_concat(self):
@@ -158,16 +154,20 @@ class TestBasicMethods(unittest.TestCase):
         b = a + ({},)
         self.assertRaises(TypeError, counters._concat, *b)
 
+    def test_none_of_arg_of_counters(self):
+        """Test Counters raises ModuleSpecError when specifying not valid
+        argument"""
+        self.assertRaises(isc.config.module_spec.ModuleSpecError,
+                          counters.Counters, None)
+        self.assertRaises(isc.config.module_spec.ModuleSpecError,
+                          counters.Counters, '/foo/bar')
+
 class BaseTestCounters():
 
     def setUp(self):
-        imp.reload(counters)
         self._statistics_data = {}
         self.counters = counters.Counters(self.TEST_SPECFILE_LOCATION)
 
-    def tearDown(self):
-        self.counters.clear_all()
-
     def check_get_statistics(self):
         """Checks no differences between the value returned from
         get_statistics() and locally collected statistics data. Also
@@ -186,7 +186,7 @@ class BaseTestCounters():
         else:
             self.assertTrue(isc.config.ModuleSpec(
                     {'module_name': 'Foo',
-                     'statistics': self.counters._statistics._spec}