def test_construction_from_three_arguments(self):
rel = Relationship(alice, "KNOWS", bob)
assert repr(rel)
assert rel.start_node() is alice
assert rel.end_node() is bob
assert rel.type() == "KNOWS"
def test_construction_from_one_argument(self):
rel = Relationship("KNOWS")
assert repr(rel)
assert rel.start_node() is None
assert rel.end_node() is None
assert rel.type() == "KNOWS"
def test_construction_from_two_arguments(self):
rel = Relationship(alice, bob)
assert repr(rel)
assert rel.start_node() is alice
assert rel.end_node() is bob
assert rel.type() is None
def test_construction_from_zero_arguments(self):
rel = Relationship()
assert repr(rel)
assert rel.start_node() is None
assert rel.end_node() is None
assert rel.type() is None
def test_construction_from_three_arguments(self):
rel = Relationship(alice, "KNOWS", bob)
assert repr(rel)
assert rel.start_node() is alice
assert rel.end_node() is bob
assert rel.type() == "KNOWS"
def test_construction_from_two_arguments(self):
rel = Relationship(alice, bob)
assert repr(rel)
assert rel.start_node() is alice
assert rel.end_node() is bob
assert rel.type() is None
def test_construction_from_one_argument(self):
rel = Relationship("KNOWS")
assert repr(rel)
assert rel.start_node() is None
assert rel.end_node() is None
assert rel.type() == "KNOWS"
def test_construction_from_zero_arguments(self):
rel = Relationship()
assert repr(rel)
assert rel.start_node() is None
assert rel.end_node() is None
assert rel.type() is None