def test_read_nse_data(self):
        t_start, t_stop = None, None  # in samples

        nio = NeuralynxIO(self.sn, use_cache='never')
        seg = Segment('testsegment')

        for el_id, el_dict in nio.parameters_nse.iteritems():
            filepath = nio.parameters_nse[el_id]['recording_file_name']
            filename = filepath.split('/')[-1].split('\\')[-1].split('.')[0]
            nio.read_nse(filename, seg, t_start=t_start, t_stop=t_stop,
                         waveforms=True)
            spiketrain = seg.filter({'electrode_id': el_id},
                                    objects=SpikeTrain)[0]

            # target_data = np.zeros((500, 32))
            # timestamps = np.zeros(500)
            entries = []
            with open(self.pd + '/%s.txt' % filename) as datafile:
                for i, line in enumerate(datafile):
                    line = line.strip('\xef\xbb\xbf')
                    entries.append(line.split())
            entries = np.asarray(entries, dtype=float)
            target_data = entries[:-1, 11:]
            timestamps = entries[:-1, 0]

            timestamps = (timestamps * pq.microsecond -
                          nio.parameters_global['t_start'])

            np.testing.assert_array_equal(timestamps.magnitude,
                                          spiketrain.magnitude)
            np.testing.assert_array_equal(target_data,
                                          spiketrain.waveforms)

 def _handle_epochs_group(self, block):
     # Note that an NWB Epoch corresponds to a Neo Segment, not to a Neo Epoch.
     epochs = self._file.get('epochs')
     # todo: handle epochs.attrs.get('tags')
     for name, epoch in epochs.items():
         # todo: handle epoch.attrs.get('links')
         timeseries = []
         for key, value in epoch.items():
             if key == 'start_time':
                 t_start = value * pq.second
             elif key == 'stop_time':
                 t_stop = value * pq.second
             else:
                 # todo: handle value['count']
                 # todo: handle value['idx_start']
                 timeseries.append(self._handle_timeseries(key, value.get('timeseries')))
         segment = Segment(name=name)
         for obj in timeseries:
             obj.segment = segment
             if isinstance(obj, AnalogSignal):
                 segment.analogsignals.append(obj)
             elif isinstance(obj, IrregularlySampledSignal):
                 segment.irregularlysampledsignals.append(obj)
             elif isinstance(obj, Event):
                 segment.events.append(obj)
             elif isinstance(obj, Epoch):
                 segment.epochs.append(obj)
         segment.block = block
         block.segments.append(segment)

    def test__children(self):
        params = {"test2": "y1", "test3": True}
        evt = Event(
            1.5 * pq.ms,
            label="test epoch",
            name="test",
            description="tester",
            file_origin="test.file",
            test1=1,
            **params
        )
        evt.annotate(test1=1.1, test0=[1, 2])
        assert_neo_object_is_compliant(evt)

        segment = Segment(name="seg1")
        segment.events = [evt]
        segment.create_many_to_one_relationship()

        self.assertEqual(evt._single_parent_objects, ("Segment",))
        self.assertEqual(evt._multi_parent_objects, ())

        self.assertEqual(evt._single_parent_containers, ("segment",))
        self.assertEqual(evt._multi_parent_containers, ())

        self.assertEqual(evt._parent_objects, ("Segment",))
        self.assertEqual(evt._parent_containers, ("segment",))

        self.assertEqual(len(evt.parents), 1)
        self.assertEqual(evt.parents[0].name, "seg1")

        assert_neo_object_is_compliant(evt)

    def test__children(self):
        signal = self.signals[0]

        segment = Segment(name='seg1')
        segment.analogsignals = [signal]
        segment.create_many_to_one_relationship()

        rchan = RecordingChannel(name='rchan1')
        rchan.analogsignals = [signal]
        rchan.create_many_to_one_relationship()

        self.assertEqual(signal._single_parent_objects,
                         ('Segment', 'RecordingChannel'))
        self.assertEqual(signal._multi_parent_objects, ())

        self.assertEqual(signal._single_parent_containers,
                         ('segment', 'recordingchannel'))
        self.assertEqual(signal._multi_parent_containers, ())

        self.assertEqual(signal._parent_objects,
                         ('Segment', 'RecordingChannel'))
        self.assertEqual(signal._parent_containers,
                         ('segment', 'recordingchannel'))

        self.assertEqual(len(signal.parents), 2)
        self.assertEqual(signal.parents[0].name, 'seg1')
        self.assertEqual(signal.parents[1].name, 'rchan1')

        assert_neo_object_is_compliant(signal)

    def test__children(self):
        segment = Segment(name='seg1')
        segment.spikes = [self.spike1]
        segment.create_many_to_one_relationship()

        unit = Unit(name='unit1')
        unit.spikes = [self.spike1]
        unit.create_many_to_one_relationship()

        self.assertEqual(self.spike1._single_parent_objects,
                         ('Segment', 'Unit'))
        self.assertEqual(self.spike1._multi_parent_objects, ())

        self.assertEqual(self.spike1._single_parent_containers,
                         ('segment', 'unit'))
        self.assertEqual(self.spike1._multi_parent_containers, ())

        self.assertEqual(self.spike1._parent_objects,
                         ('Segment', 'Unit'))
        self.assertEqual(self.spike1._parent_containers,
                         ('segment', 'unit'))

        self.assertEqual(len(self.spike1.parents), 2)
        self.assertEqual(self.spike1.parents[0].name, 'seg1')
        self.assertEqual(self.spike1.parents[1].name, 'unit1')

        assert_neo_object_is_compliant(self.spike1)

    def test__children(self):
        signal = self.signals[0]

        segment = Segment(name='seg1')
        segment.analogsignals = [signal]
        segment.create_many_to_one_relationship()

        chx = ChannelIndex(name='chx1', index=np.arange(signal.shape[1]))
        chx.analogsignals = [signal]
        chx.create_many_to_one_relationship()

        self.assertEqual(signal._single_parent_objects, ('Segment', 'ChannelIndex'))
        self.assertEqual(signal._multi_parent_objects, ())

        self.assertEqual(signal._single_parent_containers, ('segment', 'channel_index'))
        self.assertEqual(signal._multi_parent_containers, ())

        self.assertEqual(signal._parent_objects, ('Segment', 'ChannelIndex'))
        self.assertEqual(signal._parent_containers, ('segment', 'channel_index'))

        self.assertEqual(len(signal.parents), 2)
        self.assertEqual(signal.parents[0].name, 'seg1')
        self.assertEqual(signal.parents[1].name, 'chx1')

        assert_neo_object_is_compliant(signal)

 def read_segment(self,
                 lazy = False,
                 cascade = True,
                 group = 0,
                 series = 0):
     seg = Segment( name = 'test')
     if cascade:
         tree = getbyroute(self.pul.tree,[0,group,series])
         for sw,sweep in enumerate(tree['children']):
             if sw == 0:
                 starttime = pq.Quantity(float(sweep['contents'].swTimer),'s')
             for ch,channel in enumerate(sweep['children']):
                 sig = self.read_analogsignal(group=group,
                                         series=series,
                                         sweep=sw,
                                         channel = ch)
                 annotations = sweep['contents'].__dict__.keys()
                 annotations.remove('readlist')
                 for a in annotations:
                     d = {a:str(sweep['contents'].__dict__[a])}
                     sig.annotate(**d)
                 sig.t_start = pq.Quantity(float(sig.annotations['swTimer']),'s') - starttime
                 seg.analogsignals.append(sig)
         annotations = tree['contents'].__dict__.keys()
         annotations.remove('readlist')
         for a in annotations:
             d = {a:str(tree['contents'].__dict__[a])}
             seg.annotate(**d)
     create_many_to_one_relationship(seg)
     return seg

    def read_block(self, lazy=False, cascade=True, channel_index=None):
        """
        Arguments:
            Channel_index: can be int, iterable or None to select one, many or all channel(s)

        """

        blk = Block()
        if cascade:
            seg = Segment(file_origin=self._filename)
            blk.segments += [seg]

            if channel_index:
                if type(channel_index) is int:
                    channel_index = [channel_index]
                if type(channel_index) is list:
                    channel_index = np.array(channel_index)
            else:
                channel_index = np.arange(0, self._attrs["shape"][1])

            chx = ChannelIndex(name="all channels", index=channel_index)
            blk.channel_indexes.append(chx)

            ana = self.read_analogsignal(channel_index=channel_index, lazy=lazy, cascade=cascade)
            ana.channel_index = chx
            seg.duration = (self._attrs["shape"][0] / self._attrs["kwik"]["sample_rate"]) * pq.s

            # neo.tools.populate_RecordingChannel(blk)
        blk.create_many_to_one_relationship()
        return blk

    def test__children(self):
        params = {'test2': 'y1', 'test3': True}
        epc = Epoch([1.1, 1.5, 1.7]*pq.ms, durations=[20, 40, 60]*pq.ns,
                    labels=np.array(['test epoch 1',
                                     'test epoch 2',
                                     'test epoch 3'], dtype='S'),
                    name='test', description='tester',
                    file_origin='test.file',
                    test1=1, **params)
        epc.annotate(test1=1.1, test0=[1, 2])
        assert_neo_object_is_compliant(epc)

        segment = Segment(name='seg1')
        segment.epochs = [epc]
        segment.create_many_to_one_relationship()

        self.assertEqual(epc._single_parent_objects, ('Segment',))
        self.assertEqual(epc._multi_parent_objects, ())

        self.assertEqual(epc._single_parent_containers, ('segment',))
        self.assertEqual(epc._multi_parent_containers, ())

        self.assertEqual(epc._parent_objects, ('Segment',))
        self.assertEqual(epc._parent_containers, ('segment',))

        self.assertEqual(len(epc.parents), 1)
        self.assertEqual(epc.parents[0].name, 'seg1')

        assert_neo_object_is_compliant(epc)

def proc_dam(filename):
    '''Load an dam file that has already been processed by the official matlab
    file converter.  That matlab data is saved to an m-file, which is then
    converted to a numpy '.npz' file.  This numpy file is the file actually
    loaded.  This function converts it to a neo block and returns the block.
    This block can be compared to the block produced by BrainwareDamIO to
    make sure BrainwareDamIO is working properly

    block = proc_dam(filename)

    filename: The file name of the numpy file to load.  It should end with
    '*_dam_py?.npz'. This will be converted to a neo 'file_origin' property
    with the value '*.dam', so the filename to compare should fit that pattern.
    'py?' should be 'py2' for the python 2 version of the numpy file or 'py3'
    for the python 3 version of the numpy file.

    example: filename = 'file1_dam_py2.npz'
             dam file name = 'file1.dam'
    '''
    with np.load(filename) as damobj:
        damfile = damobj.items()[0][1].flatten()

    filename = os.path.basename(filename[:-12]+'.dam')

    signals = [res.flatten() for res in damfile['signal']]
    stimIndexes = [int(res[0, 0].tolist()) for res in damfile['stimIndex']]
    timestamps = [res[0, 0] for res in damfile['timestamp']]

    block = Block(file_origin=filename)

    rcg = RecordingChannelGroup(file_origin=filename)
    chan = RecordingChannel(file_origin=filename, index=0, name='Chan1')
    rcg.channel_indexes = np.array([1])
    rcg.channel_names = np.array(['Chan1'], dtype='S')

    block.recordingchannelgroups.append(rcg)
    rcg.recordingchannels.append(chan)

    params = [res['params'][0, 0].flatten() for res in damfile['stim']]
    values = [res['values'][0, 0].flatten() for res in damfile['stim']]
    params = [[res1[0] for res1 in res] for res in params]
    values = [[res1 for res1 in res] for res in values]
    stims = [dict(zip(param, value)) for param, value in zip(params, values)]

    fulldam = zip(stimIndexes, timestamps, signals, stims)
    for stimIndex, timestamp, signal, stim in fulldam:
        sig = AnalogSignal(signal=signal*pq.mV,
                           t_start=timestamp*pq.d,
                           file_origin=filename,
                           sampling_period=1.*pq.s)
        segment = Segment(file_origin=filename,
                          index=stimIndex,
                          **stim)
        segment.analogsignals = [sig]
        block.segments.append(segment)

    create_many_to_one_relationship(block)

    return block

 def _group_to_neo(self, nix_group):
     neo_attrs = self._nix_attr_to_neo(nix_group)
     neo_segment = Segment(**neo_attrs)
     neo_segment.rec_datetime = datetime.fromtimestamp(
         nix_group.created_at
     )
     self._neo_map[nix_group.name] = neo_segment
     return neo_segment

    def test_segment_write(self):
        block = Block(name=self.rword())
        segment = Segment(name=self.rword(), description=self.rword())
        block.segments.append(segment)
        self.write_and_compare([block])

        segment.annotate(**self.rdict(2))
        self.write_and_compare([block])

    def read_segment(self, n_start, n_stop, chlist=None, lazy=False, cascade=True):
        """Reads a Segment from the file and stores in database.

        The Segment will contain one AnalogSignal for each channel
        and will go from n_start to n_stop (in samples).

        Arguments:
            n_start : time in samples that the Segment begins
            n_stop : time in samples that the Segment ends

        Python indexing is used, so n_stop is not inclusive.

        Returns a Segment object containing the data.
        """
        # If no channel numbers provided, get all of them
        if chlist is None:
            chlist = self.loader.get_neural_channel_numbers()

        # Conversion from bits to full_range units
        conversion = self.full_range / 2**(8*self.header.sample_width)

        # Create the Segment
        seg = Segment(file_origin=self.filename)
        t_start = float(n_start) / self.header.f_samp
        t_stop = float(n_stop) / self.header.f_samp
        seg.annotate(t_start=t_start)
        seg.annotate(t_stop=t_stop)

        # Load data from each channel and store
        for ch in chlist:
            if lazy:
                sig = np.array([]) * conversion
            else:
                # Get the data from the loader
                sig = np.array(\
                    self.loader._get_channel(ch)[n_start:n_stop]) * conversion

            # Create an AnalogSignal with the data in it
            anasig = AnalogSignal(signal=sig,
                sampling_rate=self.header.f_samp*pq.Hz,
                t_start=t_start*pq.s, file_origin=self.filename,
                description='Channel %d from %f to %f' % (ch, t_start, t_stop),
                channel_index=int(ch))

            if lazy:
                anasig.lazy_shape = n_stop-n_start


            # Link the signal to the segment
            seg.analogsignals.append(anasig)

            # Link the signal to the recording channel from which it came
            #rc = self.channel_number_to_recording_channel[ch]
            #rc.analogsignals.append(anasig)

        return seg

    def read_segment(self, lazy=False, cascade=True,
                     gdf_id_list=None, time_unit=pq.ms, t_start=None,
                     t_stop=None, id_column=0, time_column=1, **args):
        """
        Read a Segment which contains SpikeTrain(s) with specified neuron IDs
        from the GDF data.

        Parameters
        ----------
        lazy : bool, optional, default: False
        cascade : bool, optional, default: True
        gdf_id_list : list or tuple, default: None
            Can be either list of GDF IDs of which to return SpikeTrain(s) or
            a tuple specifying the range (includes boundaries [start, stop])
            of GDF IDs. Must be specified if the GDF file contains neuron
            IDs, the default None then raises an error. Specify an empty
            list [] to retrieve the spike trains of all neurons with at least
            one spike.
        time_unit : Quantity (time), optional, default: quantities.ms
            The time unit of recorded time stamps.
        t_start : Quantity (time), default: None
            Start time of SpikeTrain. t_start must be specified, the default None
            raises an error.
        t_stop : Quantity (time), default: None
            Stop time of SpikeTrain. t_stop must be specified, the default None
            raises an error.
        id_column : int, optional, default: 0
            Column index of neuron IDs.
        time_column : int, optional, default: 1
            Column index of time stamps.

        Returns
        -------
        seg : Segment
            The Segment contains one SpikeTrain for each ID in gdf_id_list.
        """

        if isinstance(gdf_id_list, tuple):
            gdf_id_list = range(gdf_id_list[0], gdf_id_list[1] + 1)

        # __read_spiketrains() needs a list of IDs
        if gdf_id_list is None:
            gdf_id_list = [None]

        # create an empty Segment and fill in the spike trains
        seg = Segment()
        seg.spiketrains = self.__read_spiketrains(gdf_id_list,
                                                  time_unit, t_start,
                                                  t_stop,
                                                  id_column, time_column,
                                                  **args)

        return seg

    def _read_segment(self, node, parent):
        attributes = self._get_standard_attributes(node)
        segment = Segment(**attributes)

        signals = []
        for name, child_node in node['analogsignals'].items():
            if "AnalogSignal" in name:
                signals.append(self._read_analogsignal(child_node, parent=segment))
        if signals and self.merge_singles:
            segment.unmerged_analogsignals = signals  # signals will be merged later
            signals = []
        for name, child_node in node['analogsignalarrays'].items():
            if "AnalogSignalArray" in name:
                signals.append(self._read_analogsignalarray(child_node, parent=segment))
        segment.analogsignals = signals

        irr_signals = []
        for name, child_node in node['irregularlysampledsignals'].items():
            if "IrregularlySampledSignal" in name:
                irr_signals.append(self._read_irregularlysampledsignal(child_node, parent=segment))
        if irr_signals and self.merge_singles:
            segment.unmerged_irregularlysampledsignals = irr_signals
            irr_signals = []
        segment.irregularlysampledsignals = irr_signals

        epochs = []
        for name, child_node in node['epochs'].items():
            if "Epoch" in name:
                epochs.append(self._read_epoch(child_node, parent=segment))
        if self.merge_singles:
            epochs = self._merge_data_objects(epochs)
        for name, child_node in node['epocharrays'].items():
            if "EpochArray" in name:
                epochs.append(self._read_epocharray(child_node, parent=segment))
        segment.epochs = epochs

        events = []
        for name, child_node in node['events'].items():
            if "Event" in name:
                events.append(self._read_event(child_node, parent=segment))
        if self.merge_singles:
            events = self._merge_data_objects(events)
        for name, child_node in node['eventarrays'].items():
            if "EventArray" in name:
                events.append(self._read_eventarray(child_node, parent=segment))
        segment.events = events

        spiketrains = []
        for name, child_node in node['spikes'].items():
            raise NotImplementedError('Spike objects not yet handled.')
        for name, child_node in node['spiketrains'].items():
            if "SpikeTrain" in name:
                spiketrains.append(self._read_spiketrain(child_node, parent=segment))
        segment.spiketrains = spiketrains

        segment.block = parent
        return segment

    def create_segment(self, parent=None, name='Segment'):
        segment = Segment()

        segment.block = parent

        self._assign_basic_attributes(segment, name=name)
        self._assign_datetime_attributes(segment)
        self._assign_index_attribute(segment)

        self._create_segment_children(segment)

        self._assign_annotations(segment)

        return segment

 def read_segment(self,
                 lazy = False,
                 cascade = True,
                 group = 0,
                 series = 0):
     seg = Segment( name = 'test')
     if cascade:
         tree = getbyroute(self.pul.tree,[0,group,series])
         for sw,sweep in enumerate(tree['children']):
             if sw == 0:
                 starttime = pq.Quantity(float(sweep['contents'].swTimer),'s')
             for ch,channel in enumerate(sweep['children']):
                 sig = self.read_analogsignal(group=group,
                                         series=series,
                                         sweep=sw,
                                         channel = ch)
                 annotations = sweep['contents'].__dict__.keys()
                 annotations.remove('readlist')
                 for a in annotations:
                     d = {a:str(sweep['contents'].__dict__[a])}
                     sig.annotate(**d)
                 sig.t_start = pq.Quantity(float(sig.annotations['swTimer']),'s') - starttime
                 seg.analogsignals.append(sig)
         annotations = tree['contents'].__dict__.keys()
         annotations.remove('readlist')
         for a in annotations:
             d = {a:str(tree['contents'].__dict__[a])}
             seg.annotate(**d)
     create_many_to_one_relationship(seg)
     ### add protocols to signals
     for sig_index,sig in enumerate(seg.analogsignals):
         pgf_index = sig.annotations['pgf_index']
         st_rec = self.pgf.tree['children'][pgf_index]['contents']
         chnls = [ch for ch in self.pgf.tree['children'][pgf_index]['children']]
         for ch_index, chnl in enumerate(chnls):
             ep_start = sig.t_start
             for se_epoch_index, se_epoch in enumerate(chnl['children']):
                 se_rec = se_epoch['contents']
                 se_duration = pq.Quantity(float(se_rec.seDuration),'s')
                 if not(int(se_rec.seVoltageSource)):
                     se_voltage = pq.Quantity(float(se_rec.seVoltage),'V')
                 else:
                     se_voltage = pq.Quantity(float(chnl['contents'].chHolding),'V')
                 epoch = neo.Epoch(ep_start,se_duration,'protocol_epoch',value=se_voltage,channel_index=ch_index)
                 fully_annototate(chnl,epoch)
                 epoch.annotations['sig_index'] = sig_index
                 ep_start = ep_start + se_duration
                 seg.epochs.append(epoch)
     return seg

 def read_segment(self, lazy=False, cascade=True):
     data, metadata = self._read_file_contents()
     annotations = dict((k, metadata.get(k, 'unknown')) for k in ("label", "variable", "first_id", "last_id"))
     seg = Segment(**annotations)
     if cascade:
         if metadata['variable'] == 'spikes':
             for i in range(metadata['first_index'], metadata['last_index'] + 1):
                 spiketrain = self._extract_spikes(data, metadata, i, lazy)
                 if spiketrain is not None:
                     seg.spiketrains.append(spiketrain)
             seg.annotate(dt=metadata['dt']) # store dt for SpikeTrains only, as can be retrieved from sampling_period for AnalogSignal
         else:
             signal = self._extract_signals(data, metadata, lazy)
             if signal is not None:
                 seg.analogsignals.append(signal)
         seg.create_many_to_one_relationship()
     return seg

    def test__children(self):
        signal = self.signals[0]

        segment = Segment(name='seg1')
        segment.analogsignalarrays = [signal]
        segment.create_many_to_one_relationship()

        rcg = RecordingChannelGroup(name='rcg1')
        rcg.analogsignalarrays = [signal]
        rcg.create_many_to_one_relationship()

        self.assertEqual(signal._container_child_objects, ())
        self.assertEqual(signal._data_child_objects, ())
        self.assertEqual(signal._single_parent_objects,
                         ('Segment', 'RecordingChannelGroup'))
        self.assertEqual(signal._multi_child_objects, ())
        self.assertEqual(signal._multi_parent_objects, ())
        self.assertEqual(signal._child_properties, ())

        self.assertEqual(signal._single_child_objects, ())

        self.assertEqual(signal._container_child_containers, ())
        self.assertEqual(signal._data_child_containers, ())
        self.assertEqual(signal._single_child_containers, ())
        self.assertEqual(signal._single_parent_containers,
                         ('segment', 'recordingchannelgroup'))
        self.assertEqual(signal._multi_child_containers, ())
        self.assertEqual(signal._multi_parent_containers, ())

        self.assertEqual(signal._child_objects, ())
        self.assertEqual(signal._child_containers, ())
        self.assertEqual(signal._parent_objects,
                         ('Segment', 'RecordingChannelGroup'))
        self.assertEqual(signal._parent_containers,
                         ('segment', 'recordingchannelgroup'))

        self.assertEqual(signal.children, ())
        self.assertEqual(len(signal.parents), 2)
        self.assertEqual(signal.parents[0].name, 'seg1')
        self.assertEqual(signal.parents[1].name, 'rcg1')

        signal.create_many_to_one_relationship()
        signal.create_many_to_many_relationship()
        signal.create_relationship()
        assert_neo_object_is_compliant(signal)

    def test__children(self):
        params = {'testarg2': 'yes', 'testarg3': True}
        evta = EventArray([1.1, 1.5, 1.7]*pq.ms,
                          labels=np.array(['test event 1',
                                           'test event 2',
                                           'test event 3'], dtype='S'),
                          name='test', description='tester',
                          file_origin='test.file',
                          testarg1=1, **params)
        evta.annotate(testarg1=1.1, testarg0=[1, 2, 3])
        assert_neo_object_is_compliant(evta)

        segment = Segment(name='seg1')
        segment.eventarrays = [evta]
        segment.create_many_to_one_relationship()

        self.assertEqual(evta._container_child_objects, ())
        self.assertEqual(evta._data_child_objects, ())
        self.assertEqual(evta._single_parent_objects, ('Segment',))
        self.assertEqual(evta._multi_child_objects, ())
        self.assertEqual(evta._multi_parent_objects, ())
        self.assertEqual(evta._child_properties, ())

        self.assertEqual(evta._single_child_objects, ())

        self.assertEqual(evta._container_child_containers, ())
        self.assertEqual(evta._data_child_containers, ())
        self.assertEqual(evta._single_child_containers, ())
        self.assertEqual(evta._single_parent_containers, ('segment',))
        self.assertEqual(evta._multi_child_containers, ())
        self.assertEqual(evta._multi_parent_containers, ())

        self.assertEqual(evta._child_objects, ())
        self.assertEqual(evta._child_containers, ())
        self.assertEqual(evta._parent_objects, ('Segment',))
        self.assertEqual(evta._parent_containers, ('segment',))

        self.assertEqual(evta.children, ())
        self.assertEqual(len(evta.parents), 1)
        self.assertEqual(evta.parents[0].name, 'seg1')

        evta.create_many_to_one_relationship()
        evta.create_many_to_many_relationship()
        evta.create_relationship()
        assert_neo_object_is_compliant(evta)