def test_default_init(self):
"""Tests that the device is properly initialized."""
dev = CirqDevice(3, 100)
assert dev.num_wires == 3
assert dev.shots == 100
def test_default_init(self, num_wires, shots):
"""Tests that the device is properly initialized."""
dev = CirqDevice(num_wires, shots)
assert dev.num_wires == num_wires
assert dev.shots == shots
def test_default_init_of_qubits(self):
"""Tests the default initialization of CirqDevice.qubits."""
dev = CirqDevice(3, 100, False)
assert len(dev.qubits) == 3
assert dev.qubits[0] == cirq.LineQubit(0)
assert dev.qubits[1] == cirq.LineQubit(1)
assert dev.qubits[2] == cirq.LineQubit(2)
def test_outer_init_of_qubits_unordered(self):
"""Tests that giving qubits as parameters to CirqDevice works when the qubits are not ordered consistently with Cirq's convention."""
qubits = [
cirq.GridQubit(0, 1),
cirq.GridQubit(1, 0),
cirq.GridQubit(0, 0),
cirq.GridQubit(1, 1),
]
dev = CirqDevice(4, 100, False, qubits=qubits)
assert len(dev.qubits) == 4
assert dev.qubits == sorted(qubits)
def test_outer_init_of_qubits_error(self):
"""Tests that giving the wrong number of qubits as parameters to CirqDevice raises an error."""
qubits = [
cirq.GridQubit(0, 0),
cirq.GridQubit(0, 1),
cirq.GridQubit(1, 0),
cirq.GridQubit(1, 1),
]
with pytest.raises(
qml.DeviceError,
match="The number of given qubits and the specified number of wires have to match",
):
dev = CirqDevice(3, 100, False, qubits=qubits)
def test_outer_init_of_qubits(self):
"""Tests that giving qubits as parameters to CirqDevice works."""
qubits = [
cirq.GridQubit(0, 0),
cirq.GridQubit(0, 1),
cirq.GridQubit(1, 0),
cirq.GridQubit(1, 1),
]
dev = CirqDevice(4, 100, qubits=qubits)
assert len(dev.qubits) == 4
assert dev.qubits[0] == cirq.GridQubit(0, 0)
assert dev.qubits[1] == cirq.GridQubit(0, 1)
assert dev.qubits[2] == cirq.GridQubit(1, 0)
assert dev.qubits[3] == cirq.GridQubit(1, 1)
def test_to_paulistring_single_gate():
with patch.multiple(CirqDevice, __abstractmethods__=set()):
device = CirqDevice(2, shots=1, analytic=True)
result = device.to_paulistring(qml.PauliX(0))
assert result == cirq.X(cirq.LineQubit(0))
def cirq_device_3_wires(shots):
"""A mock instance of the abstract Device class"""
with patch.multiple(CirqDevice, __abstractmethods__=set()):
yield CirqDevice(3, shots=shots, analytic=True)
def cirq_device_1_wire(shots):
"""A mock instance of the abstract Device class"""
with patch.multiple(CirqDevice, __abstractmethods__=set()):
yield CirqDevice(1, shots=shots)
def test_to_paulistring_sanity_check():
with patch.multiple(CirqDevice, __abstractmethods__=set()):
device = CirqDevice(2, shots=None)
result = device.to_paulistring(qml.PauliX(0) @ qml.PauliZ(1))
assert result == cirq.X(cirq.LineQubit(0)) * cirq.Z(cirq.LineQubit(1))