def test_rzdoc_commit_log(self):
rzdoc_a = "test_commit_log_doc_a"
rzdoc_b = "test_commit_log_doc_b"
for rzdoc_name in [rzdoc_a, rzdoc_b]:
lookup_ret = self.kernel.rzdoc__lookup_by_name(rzdoc_name)
if lookup_ret != None:
self.kernel.rzdoc__delete(lookup_ret)
ret_create = self.kernel.rzdoc__create(rzdoc_a)
ret_create = self.kernel.rzdoc__create(rzdoc_b)
node_a, _ = test_util.generate_random_node_dict("type_a")
node_b, _ = test_util.generate_random_node_dict("type_b")
topo_diff_a = Topo_Diff(node_set_add=[node_a], meta={"sentence": "a"})
topo_diff_b = Topo_Diff(node_set_add=[node_b], meta={"sentence": "b"})
class FakeRZDoc(object):
def __init__(self, id):
self.id = id
class FakeContext(object):
def __init__(self, id):
self.rzdoc = FakeRZDoc(id)
self.user_name = None
ctx_a = FakeContext(rzdoc_a)
ctx_b = FakeContext(rzdoc_b)
self.kernel.diff_commit__topo(topo_diff=topo_diff_a, ctx=ctx_a)
self.kernel.diff_commit__topo(topo_diff=topo_diff_b, ctx=ctx_b)
commit_log = self.kernel.rzdoc__commit_log(rzdoc=ctx_a, limit=10)
def gen_full_db_op_set(self, test_label):
n_0, n_0_id = generate_random_node_dict(test_label)
n_1, n_1_id = generate_random_node_dict(test_label)
l_0, l_0_id = generate_random_link_dict(test_label, n_0_id, n_1_id)
n_set = [n_0, n_1]
l_set = [l_0]
topo_diff = Topo_Diff(node_set_add=n_set, link_set_add=l_set)
attr_diff = Attr_Diff()
attr_diff.add_node_attr_write(n_0_id, 'attr_0', 0)
test_rzdoc = generate_random_RZDoc(test_label)
op_set = [
DBO_rzdoc__clone(),
DBO_add_node_set(meta_attr_list_to_meta_attr_map(n_set)),
DBO_add_link_set(
meta_attr_list_to_meta_attr_map(l_set, meta_attr='__type')),
DBO_diff_commit__attr(attr_diff),
DBO_diff_commit__topo(topo_diff),
DBO_rm_node_set(id_set=[n_0_id]),
# block chain
DBO_block_chain__init(test_rzdoc),
DBO_block_chain__commit(commit_obj=topo_diff.to_json_dict()),
# rzdoc
DBO_rzdoc__create(test_rzdoc),
DBO_rzdoc__delete(test_rzdoc),
DBO_rzdoc__list(),
DBO_rzdoc__lookup_by_name(test_rzdoc.name),
]
return op_set
def test_rzdoc_commit_log(self):
rzdoc_a = 'test_commit_log_doc_a'
rzdoc_b = 'test_commit_log_doc_b'
for rzdoc_name in [rzdoc_a, rzdoc_b]:
lookup_ret = self.kernel.rzdoc__lookup_by_name(rzdoc_name)
if lookup_ret != None:
self.kernel.rzdoc__delete(lookup_ret)
ret_create = self.kernel.rzdoc__create(rzdoc_a)
ret_create = self.kernel.rzdoc__create(rzdoc_b)
node_a, _ = test_util.generate_random_node_dict('type_a')
node_b, _ = test_util.generate_random_node_dict('type_b')
topo_diff_a = Topo_Diff(node_set_add=[node_a], meta={'sentence': 'a'})
topo_diff_b = Topo_Diff(node_set_add=[node_b], meta={'sentence': 'b'})
class FakeRZDoc(object):
def __init__(self, id):
self.id = id
class FakeContext(object):
def __init__(self, id):
self.rzdoc = FakeRZDoc(id)
self.user_name = None
ctx_a = FakeContext(rzdoc_a)
ctx_b = FakeContext(rzdoc_b)
self.kernel.diff_commit__topo(topo_diff=topo_diff_a, ctx=ctx_a)
self.kernel.diff_commit__topo(topo_diff=topo_diff_b, ctx=ctx_b)
commit_log = self.kernel.rzdoc__commit_log(rzdoc=ctx_a, limit=10)
def gen_full_db_op_set(self, test_label):
n_0, n_0_id = generate_random_node_dict(test_label)
n_1, n_1_id = generate_random_node_dict(test_label)
l_0, l_0_id = generate_random_link_dict(test_label, n_0_id, n_1_id)
n_set = [n_0, n_1]
l_set = [l_0]
topo_diff = Topo_Diff(node_set_add=n_set, link_set_add=l_set)
attr_diff = Attr_Diff()
attr_diff.add_node_attr_write(n_0_id, 'attr_0', 0)
test_rzdoc = generate_random_RZDoc(test_label)
op_set = [
DBO_rzdoc__clone(),
DBO_add_node_set(meta_attr_list_to_meta_attr_map(n_set)),
DBO_add_link_set(meta_attr_list_to_meta_attr_map(l_set, meta_attr='__type')),
DBO_diff_commit__attr(attr_diff),
DBO_diff_commit__topo(topo_diff),
DBO_rm_node_set(id_set=[n_0_id]),
# block chain
DBO_block_chain__init(test_rzdoc),
DBO_block_chain__commit(commit_obj=topo_diff.to_json_dict()),
# rzdoc
DBO_rzdoc__create(test_rzdoc),
DBO_rzdoc__delete(test_rzdoc),
DBO_rzdoc__list(),
DBO_rzdoc__lookup_by_name(test_rzdoc.name),
]
return op_set
def test_add_node_set(self):
test_label = neo4j_test_util.rand_label()
n_0, n_0_id = generate_random_node_dict(test_label)
n_1, n_1_id = generate_random_node_dict(test_label)
n_map = meta_attr_list_to_meta_attr_map([n_0, n_1])
op = DBO_add_node_set(n_map)
self.assertEqual(len(op.statement_set), 1) # assert a single statement is issued
ret_id_set = self.db_ctl.exec_op(op)
self.assertEqual(len(ret_id_set), 2)
self.assertTrue(n_0_id in ret_id_set)
self.assertTrue(n_1_id in ret_id_set)
def test_add_node_set(self):
test_label = neo4j_test_util.rand_label()
n_0, n_0_id = generate_random_node_dict(test_label)
n_1, n_1_id = generate_random_node_dict(test_label)
n_map = meta_attr_list_to_meta_attr_map([n_0, n_1])
op = DBO_add_node_set(n_map)
self.assertEqual(len(op.statement_set),
1) # assert a single statement is issued
ret_id_set = self.db_ctl.exec_op(op)
self.assertEqual(len(ret_id_set), 2)
self.assertTrue(n_0_id in ret_id_set)
self.assertTrue(n_1_id in ret_id_set)
def test_REST_post_triggers_ws_multicast__topo_diff(self):
class NS_test(BaseNamespace):
def on_diff_commit__topo(self, *data):
greenlet.getcurrent().data = data
raise KeyboardInterrupt(
) # TODO: cleanup: properly close socket
test_label = neo4j_test_util.rand_label()
n, n_id = test_util.generate_random_node_dict(test_label)
topo_diff = Topo_Diff(node_set_add=[n])
def c_0():
with RZ_websocket(namespace=NS_test) as (sock, _):
c1_t.switch() # allow peer to POST
sock.wait(8) # allow self to receive
def c_1():
data = json.dumps({'topo_diff': topo_diff.to_json_dict()})
req = urllib2.Request(
url='http://rhizi.local:8080/graph/diff-commit-topo',
data=data,
headers={'Content-Type': 'application/json'})
f = urllib2.urlopen(req)
f.close()
c0_t.switch()
c0_t = greenlet(c_0)
c0_t.data = None
c1_t = greenlet(c_1)
c0_t.switch()
self.assertTrue(None != c0_t.data)
self.assertEqual(2, len(c1_t.data))
def test_REST_post_triggers_ws_multicast__topo_diff(self):
class NS_test(BaseNamespace):
def on_diff_commit__topo(self, *data):
greenlet.getcurrent().data = data
raise KeyboardInterrupt() # TODO: cleanup: properly close socket
test_label = neo4j_test_util.rand_label()
n, n_id = test_util.generate_random_node_dict(test_label)
topo_diff = Topo_Diff(node_set_add=[n])
def c_0():
with RZ_websocket(namespace=NS_test) as (sock, _):
c1_t.switch() # allow peer to POST
sock.wait(8) # allow self to receive
def c_1():
data = json.dumps({'topo_diff': topo_diff.to_json_dict()})
req = urllib2.Request(url='http://rhizi.local:8080/graph/diff-commit-topo',
data=data,
headers={'Content-Type': 'application/json'})
f = urllib2.urlopen(req)
f.close()
c0_t.switch()
c0_t = greenlet(c_0)
c0_t.data = None
c1_t = greenlet(c_1)
c0_t.switch()
self.assertTrue(None != c0_t.data)
self.assertEqual(2, len(c1_t.data))
def test_add_link_set(self):
test_label = neo4j_test_util.rand_label()
n_0, n_0_id = generate_random_node_dict(test_label)
n_1, n_1_id = generate_random_node_dict(test_label)
n_2, n_2_id = generate_random_node_dict(test_label)
l_0, l_0_id = generate_random_link_dict(test_label, n_0_id, n_1_id)
l_1, l_1_id = generate_random_link_dict(test_label, n_0_id, n_2_id)
n_map = meta_attr_list_to_meta_attr_map([n_0, n_1, n_2])
op = DBO_add_node_set(n_map)
self.db_ctl.exec_op(op)
l_map = { test_label : [l_0, l_1]}
op = DBO_add_link_set(l_map)
self.assertEqual(len(op.statement_set), 2) # no support yet for parameterized statements for link creation
ret_id_set = self.db_ctl.exec_op(op)
self.assertEqual(len(ret_id_set), 2)
self.assertTrue(l_0_id in ret_id_set)
self.assertTrue(l_1_id in ret_id_set)
def test_ws_event__topo_diff(self):
class NS_test(BaseNamespace):
def on_diff_commit__topo(self, *data):
greenlet.getcurrent().data = data
raise KeyboardInterrupt(
) # TODO: cleanup: properly close socket
test_label = neo4j_test_util.rand_label()
n_0, n_0_id = test_util.generate_random_node_dict(test_label)
n_1, n_1_id = test_util.generate_random_node_dict(test_label)
l, l_id = test_util.generate_random_link_dict(test_label, n_0_id,
n_1_id)
topo_diff = Topo_Diff(node_set_add=[n_0, n_1], link_set_add=[l])
def c_0():
with RZ_websocket(namespace=NS_test) as (_, ns_sock):
c1_t.switch() # allow peer to connect
data = json.dumps(topo_diff, cls=Topo_Diff.JSON_Encoder)
ns_sock.emit('diff_commit__topo', data)
c1_t.switch()
def c_1():
with RZ_websocket(namespace=NS_test) as (sock, _):
c0_t.switch() # allow peer to emit
sock.wait(8) # allow self to receive
c0_t = greenlet(c_0)
c1_t = greenlet(c_1)
c1_t.data = None
c0_t.switch()
self.assertTrue(None != c1_t.data)
self.assertEqual(2, len(c1_t.data))
diff_in = Topo_Diff.from_json_dict(c1_t.data[0])
commit_ret = Topo_Diff.Commit_Result_Type.from_json_dict(c1_t.data[1])
self.assertEqual(Topo_Diff, type(diff_in))
self.assertEqual(Topo_Diff.Commit_Result_Type, type(commit_ret))
def test_ws_event__topo_diff(self):
class NS_test(BaseNamespace):
def on_diff_commit__topo(self, *data):
greenlet.getcurrent().data = data
raise KeyboardInterrupt() # TODO: cleanup: properly close socket
test_label = neo4j_test_util.rand_label()
n_0, n_0_id = test_util.generate_random_node_dict(test_label)
n_1, n_1_id = test_util.generate_random_node_dict(test_label)
l, l_id = test_util.generate_random_link_dict(test_label, n_0_id, n_1_id)
topo_diff = Topo_Diff(node_set_add=[n_0, n_1], link_set_add=[l])
def c_0():
with RZ_websocket(namespace=NS_test) as (_, ns_sock):
c1_t.switch() # allow peer to connect
data = json.dumps(topo_diff, cls=Topo_Diff.JSON_Encoder)
ns_sock.emit('diff_commit__topo', data)
c1_t.switch()
def c_1():
with RZ_websocket(namespace=NS_test) as (sock, _):
c0_t.switch() # allow peer to emit
sock.wait(8) # allow self to receive
c0_t = greenlet(c_0)
c1_t = greenlet(c_1)
c1_t.data = None
c0_t.switch()
self.assertTrue(None != c1_t.data)
self.assertEqual(2, len(c1_t.data))
diff_in = Topo_Diff.from_json_dict(c1_t.data[0])
commit_ret = Topo_Diff.Commit_Result_Type.from_json_dict(c1_t.data[1])
self.assertEqual(Topo_Diff, type(diff_in))
self.assertEqual(Topo_Diff.Commit_Result_Type, type(commit_ret))
def test_add_link_set(self):
test_label = neo4j_test_util.rand_label()
n_0, n_0_id = generate_random_node_dict(test_label)
n_1, n_1_id = generate_random_node_dict(test_label)
n_2, n_2_id = generate_random_node_dict(test_label)
l_0, l_0_id = generate_random_link_dict(test_label, n_0_id, n_1_id)
l_1, l_1_id = generate_random_link_dict(test_label, n_0_id, n_2_id)
n_map = meta_attr_list_to_meta_attr_map([n_0, n_1, n_2])
op = DBO_add_node_set(n_map)
self.db_ctl.exec_op(op)
l_map = {test_label: [l_0, l_1]}
op = DBO_add_link_set(l_map)
self.assertEqual(
len(op.statement_set),
2) # no support yet for parameterized statements for link creation
ret_id_set = self.db_ctl.exec_op(op)
self.assertEqual(len(ret_id_set), 2)
self.assertTrue(l_0_id in ret_id_set)
self.assertTrue(l_1_id in ret_id_set)
def test_ws_event__attr_diff(self):
class NS_test(BaseNamespace):
def on_diff_commit__attr(self, *data):
greenlet.getcurrent().data = data
raise KeyboardInterrupt() # TODO: cleanup: properly close socket
test_label = neo4j_test_util.rand_label()
n, n_id = test_util.generate_random_node_dict(test_label)
# apply attr_diff
attr_diff = Attr_Diff()
attr_diff.add_node_attr_write(n_id, 'attr_0', 0)
attr_diff.add_node_attr_write(n_id, 'attr_1', 'a')
attr_diff.add_node_attr_rm(n_id, 'attr_2')
def c_0():
with RZ_websocket(namespace=NS_test) as (_, ns_sock):
c1_t.switch() # allow peer to connect
data = json.dumps(attr_diff)
ns_sock.emit('diff_commit__attr', data)
c1_t.switch()
def c_1():
with RZ_websocket(namespace=NS_test) as (sock, _):
c0_t.switch() # allow peer to emit
sock.wait(8) # allow self to receive
c0_t = greenlet(c_0)
c1_t = greenlet(c_1)
c1_t.data = None
c0_t.switch()
self.assertTrue(None != c1_t.data)
self.assertEqual(2, len(c1_t.data))
diff_in = Attr_Diff.from_json_dict(c1_t.data[0])
commit_ret = Attr_Diff.from_json_dict(c1_t.data[1])
self.assertEqual(Attr_Diff, type(diff_in))
self.assertEqual(Attr_Diff, type(commit_ret))
def test_ws_event__attr_diff(self):
class NS_test(BaseNamespace):
def on_diff_commit__attr(self, *data):
greenlet.getcurrent().data = data
raise KeyboardInterrupt(
) # TODO: cleanup: properly close socket
test_label = neo4j_test_util.rand_label()
n, n_id = test_util.generate_random_node_dict(test_label)
# apply attr_diff
attr_diff = Attr_Diff()
attr_diff.add_node_attr_write(n_id, 'attr_0', 0)
attr_diff.add_node_attr_write(n_id, 'attr_1', 'a')
attr_diff.add_node_attr_rm(n_id, 'attr_2')
def c_0():
with RZ_websocket(namespace=NS_test) as (_, ns_sock):
c1_t.switch() # allow peer to connect
data = json.dumps(attr_diff)
ns_sock.emit('diff_commit__attr', data)
c1_t.switch()
def c_1():
with RZ_websocket(namespace=NS_test) as (sock, _):
c0_t.switch() # allow peer to emit
sock.wait(8) # allow self to receive
c0_t = greenlet(c_0)
c1_t = greenlet(c_1)
c1_t.data = None
c0_t.switch()
self.assertTrue(None != c1_t.data)
self.assertEqual(2, len(c1_t.data))
diff_in = Attr_Diff.from_json_dict(c1_t.data[0])
commit_ret = Attr_Diff.from_json_dict(c1_t.data[1])
self.assertEqual(Attr_Diff, type(diff_in))
self.assertEqual(Attr_Diff, type(commit_ret))
def test_diff_commit__attr(self):
# create test node
test_label = neo4j_test_util.rand_label()
n_0, n_0_id = generate_random_node_dict(test_label)
n_0['attr_0'] = 0
topo_diff = Topo_Diff(node_set_add=[n_0])
op = DBO_diff_commit__topo(topo_diff)
self.db_ctl.exec_op(op)
# apply attr_diff
attr_diff = Attr_Diff()
attr_diff.add_node_attr_write(n_0_id, 'attr_0', 0)
attr_diff.add_node_attr_write(n_0_id, 'attr_1', 'a')
attr_diff.add_node_attr_rm(n_0_id, 'attr_2')
op = DBO_diff_commit__attr(attr_diff)
ret_diff = self.db_ctl.exec_op(op)
self.assertEqual(len(ret_diff.type__node), 1)
self.assertTrue(None != ret_diff.type__node[n_0_id])
# attr-set only
attr_diff = Attr_Diff()
attr_diff.add_node_attr_write(n_0_id, 'attr_2', 0)
op = DBO_diff_commit__attr(attr_diff)
ret_diff = self.db_ctl.exec_op(op)
self.assertTrue(
None != ret_diff.type__node[n_0_id]['__attr_write'].get('attr_2'))
# attr-remove only
attr_diff = Attr_Diff()
attr_diff.add_node_attr_rm(n_0_id, 'attr_2')
op = DBO_diff_commit__attr(attr_diff)
ret_diff = self.db_ctl.exec_op(op)
self.assertTrue(
'attr_2' in ret_diff.type__node[n_0_id]['__attr_remove'])
def test_diff_commit__attr(self):
# create test node
test_label = neo4j_test_util.rand_label()
n_0, n_0_id = generate_random_node_dict(test_label)
n_0['attr_0'] = 0
topo_diff = Topo_Diff(node_set_add=[n_0])
op = DBO_diff_commit__topo(topo_diff)
self.db_ctl.exec_op(op)
# apply attr_diff
attr_diff = Attr_Diff()
attr_diff.add_node_attr_write(n_0_id, 'attr_0', 0)
attr_diff.add_node_attr_write(n_0_id, 'attr_1', 'a')
attr_diff.add_node_attr_rm(n_0_id, 'attr_2')
op = DBO_diff_commit__attr(attr_diff)
ret_diff = self.db_ctl.exec_op(op)
self.assertEqual(len(ret_diff.type__node), 1)
self.assertTrue(None != ret_diff.type__node[n_0_id])
# attr-set only
attr_diff = Attr_Diff()
attr_diff.add_node_attr_write(n_0_id, 'attr_2', 0)
op = DBO_diff_commit__attr(attr_diff)
ret_diff = self.db_ctl.exec_op(op)
self.assertTrue(None != ret_diff.type__node[n_0_id]['__attr_write'].get('attr_2'))
# attr-remove only
attr_diff = Attr_Diff()
attr_diff.add_node_attr_rm(n_0_id, 'attr_2')
op = DBO_diff_commit__attr(attr_diff)
ret_diff = self.db_ctl.exec_op(op)
self.assertTrue('attr_2' in ret_diff.type__node[n_0_id]['__attr_remove'])
def test_diff_commit__topo(self):
test_label = neo4j_test_util.rand_label()
n_0, n_0_id = generate_random_node_dict(test_label)
n_1, n_1_id = generate_random_node_dict(test_label)
n_2, n_2_id = generate_random_node_dict(test_label)
l_0, l_0_id = generate_random_link_dict(test_label, n_0_id, n_1_id)
l_1, l_1_id = generate_random_link_dict(test_label, n_0_id, n_2_id)
n_set = [n_0, n_1, n_2]
l_set = [l_0, l_1]
topo_diff = Topo_Diff(node_set_add=n_set,
link_set_add=l_set)
# commit diff
op = DBO_diff_commit__topo(topo_diff)
ret_topo_diff = self.db_ctl.exec_op(op)
# test return type
self.assertTrue(hasattr(ret_topo_diff, 'node_id_set_add'))
self.assertTrue(hasattr(ret_topo_diff, 'link_id_set_add'))
self.assertTrue(hasattr(ret_topo_diff, 'node_id_set_rm'))
self.assertTrue(hasattr(ret_topo_diff, 'link_id_set_rm'))
# test return set lengths
self.assertEqual(len(ret_topo_diff.node_id_set_add), len(n_set))
self.assertEqual(len(ret_topo_diff.link_id_set_add), len(l_set))
self.assertEqual(len(ret_topo_diff.node_id_set_rm), 0)
self.assertEqual(len(ret_topo_diff.link_id_set_rm), 0)
# assert nodes persisted
id_set = self.db_ctl.exec_op(DBO_match_node_set_by_id_attribute([n_0_id, n_1_id]))
self.assertEqual(len(id_set), 2)
# assert links persisted
l_ptr_0 = Link.link_ptr(src_id=n_0_id, dst_id=n_1_id)
l_ptr_1 = Link.link_ptr(src_id=n_0_id, dst_id=n_2_id)
op = DBO_load_link_set.init_from_link_ptr_set([l_ptr_0, l_ptr_1])
id_set = self.db_ctl.exec_op(op)
self.assertEqual(len(id_set), 2)
# remova links
topo_diff = Topo_Diff(link_id_set_rm=[l_0_id, l_1_id])
op = DBO_diff_commit__topo(topo_diff)
ret_topo_diff = self.db_ctl.exec_op(op)
self.assertEqual(len(ret_topo_diff.link_id_set_rm), 2)
# assert links removed
op = DBO_load_link_set.init_from_link_ptr_set([l_ptr_0, l_ptr_1])
id_set = self.db_ctl.exec_op(op)
self.assertEqual(len(id_set), 0)
# removal nodes
topo_diff = Topo_Diff(node_id_set_rm=[n_2_id])
op = DBO_diff_commit__topo(topo_diff)
ret_topo_diff = self.db_ctl.exec_op(op)
self.assertEqual(len(ret_topo_diff.node_id_set_rm), 1)
# assert nodes removed
op = DBO_match_node_set_by_id_attribute([n_2_id])
id_set = self.db_ctl.exec_op(op)
self.assertEqual(len(id_set), 0)
def test_diff_commit__topo(self):
test_label = neo4j_test_util.rand_label()
n_0, n_0_id = generate_random_node_dict(test_label)
n_1, n_1_id = generate_random_node_dict(test_label)
n_2, n_2_id = generate_random_node_dict(test_label)
l_0, l_0_id = generate_random_link_dict(test_label, n_0_id, n_1_id)
l_1, l_1_id = generate_random_link_dict(test_label, n_0_id, n_2_id)
n_set = [n_0, n_1, n_2]
l_set = [l_0, l_1]
topo_diff = Topo_Diff(node_set_add=n_set, link_set_add=l_set)
# commit diff
op = DBO_diff_commit__topo(topo_diff)
ret_topo_diff = self.db_ctl.exec_op(op)
# test return type
self.assertTrue(hasattr(ret_topo_diff, 'node_id_set_add'))
self.assertTrue(hasattr(ret_topo_diff, 'link_id_set_add'))
self.assertTrue(hasattr(ret_topo_diff, 'node_id_set_rm'))
self.assertTrue(hasattr(ret_topo_diff, 'link_id_set_rm'))
# test return set lengths
self.assertEqual(len(ret_topo_diff.node_id_set_add), len(n_set))
self.assertEqual(len(ret_topo_diff.link_id_set_add), len(l_set))
self.assertEqual(len(ret_topo_diff.node_id_set_rm), 0)
self.assertEqual(len(ret_topo_diff.link_id_set_rm), 0)
# assert nodes persisted
id_set = self.db_ctl.exec_op(
DBO_match_node_set_by_id_attribute([n_0_id, n_1_id]))
self.assertEqual(len(id_set), 2)
# assert links persisted
l_ptr_0 = Link.link_ptr(src_id=n_0_id, dst_id=n_1_id)
l_ptr_1 = Link.link_ptr(src_id=n_0_id, dst_id=n_2_id)
op = DBO_load_link_set.init_from_link_ptr_set([l_ptr_0, l_ptr_1])
id_set = self.db_ctl.exec_op(op)
self.assertEqual(len(id_set), 2)
# remova links
topo_diff = Topo_Diff(link_id_set_rm=[l_0_id, l_1_id])
op = DBO_diff_commit__topo(topo_diff)
ret_topo_diff = self.db_ctl.exec_op(op)
self.assertEqual(len(ret_topo_diff.link_id_set_rm), 2)
# assert links removed
op = DBO_load_link_set.init_from_link_ptr_set([l_ptr_0, l_ptr_1])
id_set = self.db_ctl.exec_op(op)
self.assertEqual(len(id_set), 0)
# removal nodes
topo_diff = Topo_Diff(node_id_set_rm=[n_2_id])
op = DBO_diff_commit__topo(topo_diff)
ret_topo_diff = self.db_ctl.exec_op(op)
self.assertEqual(len(ret_topo_diff.node_id_set_rm), 1)
# assert nodes removed
op = DBO_match_node_set_by_id_attribute([n_2_id])
id_set = self.db_ctl.exec_op(op)
self.assertEqual(len(id_set), 0)
