def test_use_sockets_one_destination():
"""
Verify multiple sockets can be used by one destination
"""
sockets = LocalSocket.get_sockets(10)
d = Destination(1)
for s in sockets:
d.use(s)
def test_initialization_error():
"""
Verify that value error is raised when input parameters do not make sense
"""
try:
# reliability must be between 0 and 1
d = Destination(1, reliability=1.1)
except ValueError:
assert True
else:
assert False
try:
# learning rate must be between 0 and 1
d = Destination(1, learning_rate=-0.5)
except ValueError:
assert True
else:
assert False
def test_use_socket_multiple_times_on_destination():
"""
Verify that one socket used more than once on a destination raises an error
"""
d = Destination(1)
s = LocalSocket.get_sockets(1)[0]
d.use(s)
try:
d.use(s)
except ValueError:
assert True
else:
assert False
def test_use_socket_one_destination():
"""
Verify that a provided socket can be used by a destination
"""
d = Destination(1)
s = LocalSocket.get_sockets(1)[0]
d.use(s)
try:
d.use(s)
except ValueError:
assert True
else:
assert False
def test_initialization():
"""
Verify destination starts up with a unique id describing destination
"""
d = Destination(1)
assert d.target == 1
def get_destinations(size, reliability=0.9):
return [Destination(t, reliability=reliability) for t in range(size)]
def test_update_distance():
"""
Verify that the internal methods: _decrement_reliability and
_increment_reliability change the distance and reliability as expected. If
the system becomes less reliabilty the node should increase its distance
and if the system becomes reliabile at a certain distance it should stay
at that distance
"""
d = Destination(1)
distance = d.distance
assert d.distance == math.inf
assert d.reliability == 0.0
for i in range(100):
r = d.reliability
d._decrement_reliability(3)
d._increment_reliability(3, 1, 0)
assert d.reliability >= r
assert d.distance == 3
for i in range(100):
r = d.reliability
d._decrement_reliability(3)
assert d.reliability <= r
assert d.reliability == 0.0
assert d.distance == math.inf
for i in range(100):
d._decrement_reliability(3)
d._increment_reliability(3, 0.5, 0)
assert d.distance == math.inf
assert d.reliability > 0.4
for i in range(100):
d._decrement_reliability(2)
d._increment_reliability(2, 0.85, 0)
assert d.distance == 3
assert d.reliability > 0.9
for i in range(100):
d._decrement_reliability(4)
d._increment_reliability(4, 0, 0)
d._increment_reliability(3, 0.5, 0)
d._increment_reliability(2, 0.85, 0)
assert d.distance == 3