def test_just_qubits(self):
"""A dag with 9 operations (3 CXs, 2Xs, 2Ys and 2 Hs) on the longest
path
"""
# ┌───┐┌───┐┌───┐
# q0_0: ──■──┤ X ├┤ Y ├┤ H ├──■───────────────────■──
# ┌─┴─┐└───┘└───┘└───┘┌─┴─┐┌───┐┌───┐┌───┐┌─┴─┐
# q0_1: ┤ X ├───────────────┤ X ├┤ X ├┤ Y ├┤ H ├┤ X ├
# └───┘ └───┘└───┘└───┘└───┘└───┘
qr = QuantumRegister(2)
circuit = QuantumCircuit(qr)
circuit.cx(qr[0], qr[1])
circuit.x(qr[0])
circuit.y(qr[0])
circuit.h(qr[0])
circuit.cx(qr[0], qr[1])
circuit.x(qr[1])
circuit.y(qr[1])
circuit.h(qr[1])
circuit.cx(qr[0], qr[1])
dag = circuit_to_dag(circuit)
pass_ = CountOpsLongestPath()
_ = pass_.run(dag)
count_ops = pass_.property_set["count_ops_longest_path"]
self.assertDictEqual(count_ops, {"cx": 3, "x": 2, "y": 2, "h": 2})
def test_empty_dag(self):
""" Empty DAG has empty counts."""
circuit = QuantumCircuit()
dag = circuit_to_dag(circuit)
pass_ = CountOpsLongestPath()
_ = pass_.run(dag)
self.assertDictEqual(pass_.property_set['count_ops_longest_path'], {})
def test_just_qubits(self):
""" A dag with 9 operations (3 CXs, 2Xs, 2Ys and 2 Hs) on the longest
path
"""
qr = QuantumRegister(2)
circuit = QuantumCircuit(qr)
circuit.cx(qr[0], qr[1])
circuit.x(qr[0])
circuit.y(qr[0])
circuit.h(qr[0])
circuit.cx(qr[0], qr[1])
circuit.x(qr[1])
circuit.y(qr[1])
circuit.h(qr[1])
circuit.cx(qr[0], qr[1])
dag = circuit_to_dag(circuit)
pass_ = CountOpsLongestPath()
_ = pass_.run(dag)
count_ops = pass_.property_set['count_ops_longest_path']
self.assertDictEqual(count_ops, {'cx': 3, 'x': 2, 'y': 2, 'h': 2})