class TestDeletion(object):
@pytest.fixture(autouse=True)
def setup(self, graph):
self.batch = WriteBatch(graph)
self.graph = graph
def test_can_delete_relationship_and_related_nodes(self):
self.batch.create({"name": "Alice"})
self.batch.create({"name": "Bob"})
self.batch.create((0, "KNOWS", 1))
alice, bob, ab = self.batch.submit()
assert alice.exists
assert bob.exists
assert ab.exists
self.batch.clear()
self.batch.delete(ab)
self.batch.delete(alice)
self.batch.delete(bob)
self.batch.run()
assert not alice.exists
assert not bob.exists
assert not ab.exists
class TestDeletion(object):
@pytest.fixture(autouse=True)
def setup(self, graph):
self.batch = WriteBatch(graph)
self.graph = graph
def test_can_delete_relationship_and_related_nodes(self):
self.batch.create({"name": "Alice"})
self.batch.create({"name": "Bob"})
self.batch.create((0, "KNOWS", 1))
alice, bob, ab = self.batch.submit()
assert alice.exists
assert bob.exists
assert ab.exists
self.batch.clear()
self.batch.delete(ab)
self.batch.delete(alice)
self.batch.delete(bob)
self.batch.run()
assert not alice.exists
assert not bob.exists
assert not ab.exists
class TestUniqueRelationshipCreation(object):
@pytest.fixture(autouse=True)
def setup(self, graph):
self.batch = WriteBatch(graph)
def test_can_create_relationship_if_none_exists(self):
self.batch.create({"name": "Alice"})
self.batch.create({"name": "Bob"})
alice, bob = self.batch.submit()
self.batch.clear()
self.batch.get_or_create_path(
alice, ("KNOWS", {"since": 2000}), bob)
path, = self.batch.submit()
knows = path.relationships[0]
assert isinstance(knows, Relationship)
assert knows.start_node == alice
assert knows.type == "KNOWS"
assert knows.end_node == bob
assert knows["since"] == 2000
self.recycling = [knows, alice, bob]
def test_will_get_relationship_if_one_exists(self):
self.batch.create({"name": "Alice"})
self.batch.create({"name": "Bob"})
alice, bob = self.batch.submit()
self.batch.clear()
self.batch.get_or_create_path(
alice, ("KNOWS", {"since": 2000}), bob)
self.batch.get_or_create_path(
alice, ("KNOWS", {"since": 2000}), bob)
path1, path2 = self.batch.submit()
assert path1 == path2
def test_will_fail_batch_if_more_than_one_exists(self):
self.batch.create({"name": "Alice"})
self.batch.create({"name": "Bob"})
self.batch.create((0, "KNOWS", 1))
self.batch.create((0, "KNOWS", 1))
alice, bob, k1, k2 = self.batch.submit()
self.batch.clear()
self.batch.get_or_create_path(alice, "KNOWS", bob)
try:
self.batch.submit()
except BatchError as error:
cause = error.__cause__
assert isinstance(cause, GraphError)
assert cause.__class__.__name__ == "UniquePathNotUniqueException"
else:
assert False
def test_can_create_relationship_and_start_node(self):
self.batch.create({"name": "Bob"})
bob, = self.batch.submit()
self.batch.clear()
self.batch.get_or_create_path(None, "KNOWS", bob)
path, = self.batch.submit()
knows = path.relationships[0]
alice = knows.start_node
assert isinstance(knows, Relationship)
assert isinstance(alice, Node)
assert knows.type == "KNOWS"
assert knows.end_node == bob
self.recycling = [knows, alice, bob]
def test_can_create_relationship_and_end_node(self):
self.batch.create({"name": "Alice"})
alice, = self.batch.submit()
self.batch.clear()
self.batch.get_or_create_path(alice, "KNOWS", None)
path, = self.batch.submit()
knows = path.relationships[0]
bob = knows.end_node
assert isinstance(knows, Relationship)
assert knows.start_node == alice
assert knows.type == "KNOWS"
assert isinstance(bob, Node)
self.recycling = [knows, alice, bob]
class TestUniqueRelationshipCreation(object):
@pytest.fixture(autouse=True)
def setup(self, graph):
self.batch = WriteBatch(graph)
def test_can_create_relationship_if_none_exists(self):
self.batch.create({"name": "Alice"})
self.batch.create({"name": "Bob"})
alice, bob = self.batch.submit()
self.batch.clear()
self.batch.get_or_create_path(alice, ("KNOWS", {"since": 2000}), bob)
path, = self.batch.submit()
knows = path.relationships[0]
assert isinstance(knows, Relationship)
assert knows.start_node == alice
assert knows.type == "KNOWS"
assert knows.end_node == bob
assert knows["since"] == 2000
self.recycling = [knows, alice, bob]
def test_will_get_relationship_if_one_exists(self):
self.batch.create({"name": "Alice"})
self.batch.create({"name": "Bob"})
alice, bob = self.batch.submit()
self.batch.clear()
self.batch.get_or_create_path(alice, ("KNOWS", {"since": 2000}), bob)
self.batch.get_or_create_path(alice, ("KNOWS", {"since": 2000}), bob)
path1, path2 = self.batch.submit()
assert path1 == path2
def test_will_fail_batch_if_more_than_one_exists(self):
self.batch.create({"name": "Alice"})
self.batch.create({"name": "Bob"})
self.batch.create((0, "KNOWS", 1))
self.batch.create((0, "KNOWS", 1))
alice, bob, k1, k2 = self.batch.submit()
self.batch.clear()
self.batch.get_or_create_path(alice, "KNOWS", bob)
try:
self.batch.submit()
except BatchError as error:
cause = error.__cause__
assert cause.__class__.__name__ == "UniquePathNotUniqueException"
else:
assert False
def test_can_create_relationship_and_start_node(self):
self.batch.create({"name": "Bob"})
bob, = self.batch.submit()
self.batch.clear()
self.batch.get_or_create_path(None, "KNOWS", bob)
path, = self.batch.submit()
knows = path.relationships[0]
alice = knows.start_node
assert isinstance(knows, Relationship)
assert isinstance(alice, Node)
assert knows.type == "KNOWS"
assert knows.end_node == bob
self.recycling = [knows, alice, bob]
def test_can_create_relationship_and_end_node(self):
self.batch.create({"name": "Alice"})
alice, = self.batch.submit()
self.batch.clear()
self.batch.get_or_create_path(alice, "KNOWS", None)
path, = self.batch.submit()
knows = path.relationships[0]
bob = knows.end_node
assert isinstance(knows, Relationship)
assert knows.start_node == alice
assert knows.type == "KNOWS"
assert isinstance(bob, Node)
self.recycling = [knows, alice, bob]