def test_decompose_toffoli(self):
"""Test decompose CCX.
"""
qr1 = QuantumRegister(2, 'qr1')
qr2 = QuantumRegister(1, 'qr2')
circuit = QuantumCircuit(qr1, qr2)
circuit.ccx(qr1[0], qr1[1], qr2[0])
dag = circuit_to_dag(circuit)
pass_ = Decompose(ToffoliGate(qr1[0], qr1[1], qr2[0]))
after_dag = pass_.run(dag)
op_nodes = after_dag.get_op_nodes(data=True)
self.assertEqual(len(op_nodes), 15)
for node in op_nodes:
op = node[1]["op"]
self.assertIn(op.name, ['h', 't', 'tdg', 'cx'])
def test_controlled_cx(self):
"""Test creation of controlled cx gate"""
self.assertEqual(CnotGate().control(), ToffoliGate())