def test_is_channel_no_measurement(self, prog):
"""test that the is_channel function returns True if no measurements are present"""
assert utils.is_channel(prog)
with prog.context as q:
Sgate(0.4) | q[0]
LossChannel(0.4) | q[0]
BSgate(0.4) | q
assert utils.is_channel(prog)
def test_is_channel_preparation(self, prog):
"""is_channel() returns False if preparations are present"""
with prog.context as q:
Sgate(0.4) | q[0]
BSgate() | q
Squeezed(0.4) | q[1]
assert not utils.is_channel(prog)
def test_is_channel_measurement(self, prog):
"""is_channel() returns False if measurements are present"""
with prog.context as q:
Sgate(0.4) | q[0]
BSgate() | q
MeasureX | q[0]
Sgate(0.4) | q[1]
assert not utils.is_channel(prog)
def test_is_channel_no_measurement(self):
"""test that the is_channel function returns True if no measurements are present"""
eng, q = sf.Engine(2)
assert utils.is_channel(eng)
with eng:
Sgate(0.4) | q[0]
BSgate(0.4) | q
assert utils.is_channel(eng)
with eng:
Sgate(0.4) | q[0]
LossChannel(0.4) | q[0]
BSgate(0.4) | q
assert utils.is_channel(eng)
def test_is_channel_measurement(self):
"""test that the is_channel function returns False if measurements
or preparations are present"""
eng, q = sf.Engine(2)
with eng:
Sgate(0.4) | q[0]
BSgate() | q
MeasureX | q[0]
Sgate(0.4) | q[1]
assert not utils.is_channel(eng)
eng.reset()
with eng:
Sgate(0.4) | q[0]
BSgate() | q
Squeezed(0.4) | q[1]
assert not utils.is_channel(eng)