def test_empty_dag(self):
""" Empty DAG has 0 depth """
circuit = QuantumCircuit()
dag = circuit_to_dag(circuit)
pass_ = Depth()
_ = pass_.run(dag)
self.assertEqual(pass_.property_set['depth'], 0)
def test_depth_one(self):
""" A dag with operations in parallel and depth 1"""
qr = QuantumRegister(2)
circuit = QuantumCircuit(qr)
circuit.h(qr[0])
circuit.h(qr[1])
dag = circuit_to_dag(circuit)
pass_ = Depth()
_ = pass_.run(dag)
self.assertEqual(pass_.property_set['depth'], 1)
def test_just_qubits(self):
""" A dag with 8 operations and no classic bits"""
qr = QuantumRegister(2)
circuit = QuantumCircuit(qr)
circuit.h(qr[0])
circuit.h(qr[1])
circuit.cx(qr[0], qr[1])
circuit.cx(qr[0], qr[1])
circuit.cx(qr[0], qr[1])
circuit.cx(qr[0], qr[1])
circuit.cx(qr[1], qr[0])
circuit.cx(qr[1], qr[0])
dag = circuit_to_dag(circuit)
pass_ = Depth()
_ = pass_.run(dag)
self.assertEqual(pass_.property_set['depth'], 7)
def test_just_qubits(self):
"""A dag with 8 operations and no classic bits"""
# ┌───┐ ┌───┐┌───┐
# q0_0: ┤ H ├──■────■────■────■──┤ X ├┤ X ├
# ├───┤┌─┴─┐┌─┴─┐┌─┴─┐┌─┴─┐└─┬─┘└─┬─┘
# q0_1: ┤ H ├┤ X ├┤ X ├┤ X ├┤ X ├──■────■──
# └───┘└───┘└───┘└───┘└───┘
qr = QuantumRegister(2)
circuit = QuantumCircuit(qr)
circuit.h(qr[0])
circuit.h(qr[1])
circuit.cx(qr[0], qr[1])
circuit.cx(qr[0], qr[1])
circuit.cx(qr[0], qr[1])
circuit.cx(qr[0], qr[1])
circuit.cx(qr[1], qr[0])
circuit.cx(qr[1], qr[0])
dag = circuit_to_dag(circuit)
pass_ = Depth()
_ = pass_.run(dag)
self.assertEqual(pass_.property_set["depth"], 7)
