def test_cannot_build_path_with_two_consecutive_rels():
try:
_ = Path(Node(name="Alice"), Rel("KNOWS"), Rel("KNOWS"), Node(name="Bob"))
except JoinError:
assert True
else:
assert False
def test_path_hashes(graph):
p1 = Path(Node("Person", name="Alice"), Rel("KNOWS", since=1999),
Node("Person", name="Bob"))
p2 = Path(Node("Person", name="Alice"), Rel("KNOWS", since=1999),
Node("Person", name="Bob"))
assert hash(p1) == hash(p2)
graph.create(p1)
assert hash(p1) != hash(p2)
def test_changing_type_of_unbound_rel_mirrors_to_pair_rev():
rel = Rel("KNOWS")
assert rel.pair is None
rev = -rel
assert rel.pair is rev
assert rev.pair is rel
assert rel.type == "KNOWS"
assert rev.type == "KNOWS"
rel.type = "LIKES"
assert rel.type == "LIKES"
assert rev.type == "LIKES"
def test_rel_and_rev_hashes(graph):
assert hash(Rel("KNOWS")) == hash(Rel("KNOWS"))
assert hash(Rel("KNOWS")) == -hash(Rev("KNOWS"))
assert hash(Rel("KNOWS", well=True,
since=1999)) == hash(Rel("KNOWS", since=1999, well=True))
rel_1 = Node("KNOWS", since=1999)
graph.create(rel_1)
rel_2 = Node("KNOWS", since=1999)
rel_2.bind(rel_1.uri)
assert rel_1 is not rel_2
assert hash(rel_1) == hash(rel_2)
def test_rel_cast():
knows = Rel("KNOWS", since=1999)
assert Rel.cast() == Rel()
assert Rel.cast(None) is None
assert Rel.cast(knows) is knows
assert Rel.cast("KNOWS") == Rel("KNOWS")
assert Rel.cast(since=1999) == Rel(since=1999)
assert Rel.cast("KNOWS", since=1999) == Rel("KNOWS", since=1999)
assert Rel.cast({"since": 1999}) == Rel(since=1999)
assert Rel.cast(("KNOWS", {"since": 1999})) == knows
assert Rel.cast(Relationship({}, "KNOWS", {})) == Rel("KNOWS")
def test_rel_cannot_have_multiple_types():
try:
_ = Rel("LIKES", "HATES")
except ValueError:
assert True
else:
assert False
def test_minimal_rel_hydrate():
dehydrated = {
"self": "http://localhost:7474/db/data/relationship/11",
}
hydrated = Rel.hydrate(dehydrated)
assert isinstance(hydrated, Rel)
assert hydrated.bound
assert hydrated.resource.uri == dehydrated["self"]
def test_rel_hydrate_with_type():
dehydrated = {
"self": "http://localhost:7474/db/data/relationship/11",
"type": "KNOWS",
}
hydrated = Rel.hydrate(dehydrated)
assert isinstance(hydrated, Rel)
assert hydrated.type == dehydrated["type"]
assert hydrated.bound
assert hydrated.resource.uri == dehydrated["self"]
def test_rel_hydrate_with_properties():
dehydrated = {
"self": "http://localhost:7474/db/data/relationship/11",
"data": {
"since": 1999,
},
}
hydrated = Rel.hydrate(dehydrated)
assert isinstance(hydrated, Rel)
assert hydrated.properties == dehydrated["data"]
assert hydrated.bound
assert hydrated.resource.uri == dehydrated["self"]
def test_full_rel_hydrate():
dehydrated = {
"extensions": {
},
"start": "http://localhost:7474/db/data/node/23",
"property": "http://localhost:7474/db/data/relationship/11/properties/{key}",
"self": "http://localhost:7474/db/data/relationship/11",
"properties": "http://localhost:7474/db/data/relationship/11/properties",
"type": "KNOWS",
"end": "http://localhost:7474/db/data/node/22",
"data": {
"since": 1999,
},
}
hydrated = Rel.hydrate(dehydrated)
assert isinstance(hydrated, Rel)
assert hydrated.type == dehydrated["type"]
assert hydrated.properties == dehydrated["data"]
assert hydrated.bound
assert hydrated.resource.uri == dehydrated["self"]
def test_rel_cast():
knows = Rel("KNOWS", since=1999)
assert Rel.cast() == Rel()
assert Rel.cast(None) is None
assert Rel.cast(knows) is knows
assert Rel.cast("KNOWS") == Rel("KNOWS")
assert Rel.cast(since=1999) == Rel(since=1999)
assert Rel.cast("KNOWS", since=1999) == Rel("KNOWS", since=1999)
assert Rel.cast({"since": 1999}) == Rel(since=1999)
assert Rel.cast(("KNOWS", {"since": 1999})) == knows
assert Rel.cast(Relationship({}, "KNOWS", {})) == Rel("KNOWS")
def test_can_apply_unary_absolute_to_rel():
before = Rel("KNOWS", since=1999)
after = abs(before)
assert isinstance(after, Rel)
assert after.type == before.type
assert after.properties == before.properties
def test_can_apply_unary_negative_to_rel():
before = Rel("KNOWS", since=1999)
after = -before
assert isinstance(after, Rev)
assert after.type == before.type
assert after.properties == before.properties
def test_rel_never_equals_none():
rel = Rel("KNOWS")
none = None
assert rel != none
def test_type_of_unbound_rel_is_mutable():
ab = Rel("KNOWS")
ab.type = "LIKES"
assert ab.type == "LIKES"
def test_unbound_rel_representation():
likes = Rel("LIKES")
assert repr(likes) == "-[:LIKES]->"