def test_circuit_depth_snap3(self):
"""Test circuit depth for snapshots #3."""
q = QuantumRegister(4, "q")
c = ClassicalRegister(4, "c")
circ = QuantumCircuit(q, c)
circ.h(0)
circ.cx(0, 1)
circ.append(Snapshot("snap0", num_qubits=4), [0, 1, 2, 3])
circ.append(Snapshot("snap1", num_qubits=4), [0, 1, 2, 3])
circ.h(2)
circ.cx(2, 3)
self.assertEqual(circ.depth(), 4)
def test_circuit_depth_snap2(self):
"""Test circuit depth for snapshots #2.
"""
q = QuantumRegister(4, 'q')
c = ClassicalRegister(4, 'c')
circ = QuantumCircuit(q, c)
circ.h(0)
circ.append(Snapshot('snap0', num_qubits=4), [0, 1, 2, 3])
circ.cx(0, 1)
circ.append(Snapshot('snap1', num_qubits=4), [0, 1, 2, 3])
circ.h(2)
circ.append(Snapshot('snap2', num_qubits=4), [0, 1, 2, 3])
circ.cx(2, 3)
self.assertEqual(circ.depth(), 4)
def test_unroll_snapshot(self):
"""test unroll snapshot"""
num_qubits = self.circuit.num_qubits
instr = Snapshot("0", num_qubits=num_qubits)
self.circuit.append(instr, range(num_qubits))
self.ref_circuit.append(instr, range(num_qubits))
self.compare_dags()
def test_circuit_size_ignores_barriers_snapshots(self):
"""Circuit.size should not count barriers or snapshots."""
q = QuantumRegister(4, 'q')
c = ClassicalRegister(4, 'c')
qc = QuantumCircuit(q, c)
qc.h(q[0])
qc.cx(q[0], q[1])
self.assertEqual(qc.size(), 2)
qc.barrier(q)
self.assertEqual(qc.size(), 2)
qc.append(Snapshot('snapshot_label', num_qubits=4), [0, 1, 2, 3])
self.assertEqual(qc.size(), 2)
def test_circuit_depth_snap3(self):
"""Test circuit depth for snapshots #3."""
# ┌───┐ ░ ░
# q_0: ┤ H ├──■───░──░───────────
# └───┘┌─┴─┐ ░ ░
# q_1: ─────┤ X ├─░──░───────────
# └───┘ ░ ░ ┌───┐
# q_2: ───────────░──░─┤ H ├──■──
# ░ ░ └───┘┌─┴─┐
# q_3: ───────────░──░──────┤ X ├
# ░ ░ └───┘
q = QuantumRegister(4, "q")
c = ClassicalRegister(4, "c")
circ = QuantumCircuit(q, c)
circ.h(0)
circ.cx(0, 1)
circ.append(Snapshot("snap0", num_qubits=4), [0, 1, 2, 3])
circ.append(Snapshot("snap1", num_qubits=4), [0, 1, 2, 3])
circ.h(2)
circ.cx(2, 3)
self.assertEqual(circ.depth(), 4)
