class TestParameterCtrlState(QiskitTestCase):
"""Test gate equality with ctrl_state parameter."""
@data((RXGate(0.5), CRXGate(0.5)), (RYGate(0.5), CRYGate(0.5)),
(RZGate(0.5), CRZGate(0.5)), (XGate(), CXGate()),
(YGate(), CYGate()), (ZGate(), CZGate()),
(U1Gate(0.5), CU1Gate(0.5)), (SwapGate(), CSwapGate()),
(HGate(), CHGate()), (U3Gate(0.1, 0.2, 0.3), CU3Gate(0.1, 0.2, 0.3)))
@unpack
def test_ctrl_state_one(self, gate, controlled_gate):
"""Test controlled gates with ctrl_state
See https://github.com/Qiskit/qiskit-terra/pull/4025
"""
self.assertEqual(gate.control(1, ctrl_state='1'), controlled_gate)
def test_is_identity(self):
""" The is_identity function determines whether a pair of gates
forms the identity, when ignoring control qubits.
"""
seq = [DAGNode({'type': 'op', 'op': XGate().control()}),
DAGNode({'type': 'op', 'op': XGate().control(2)})]
self.assertTrue(HoareOptimizer()._is_identity(seq))
seq = [DAGNode({'type': 'op', 'op': RZGate(-pi/2).control()}),
DAGNode({'type': 'op', 'op': RZGate(pi/2).control(2)})]
self.assertTrue(HoareOptimizer()._is_identity(seq))
seq = [DAGNode({'type': 'op', 'op': CSwapGate()}),
DAGNode({'type': 'op', 'op': SwapGate()})]
self.assertTrue(HoareOptimizer()._is_identity(seq))
def test_is_identity(self):
"""The is_identity function determines whether a pair of gates
forms the identity, when ignoring control qubits.
"""
seq = [DAGOpNode(op=XGate().control()), DAGOpNode(op=XGate().control(2))]
self.assertTrue(HoareOptimizer()._is_identity(seq))
seq = [
DAGOpNode(op=RZGate(-pi / 2).control()),
DAGOpNode(op=RZGate(pi / 2).control(2)),
]
self.assertTrue(HoareOptimizer()._is_identity(seq))
seq = [DAGOpNode(op=CSwapGate()), DAGOpNode(op=SwapGate())]
self.assertTrue(HoareOptimizer()._is_identity(seq))
def test_controlled_swap(self):
"""Test creation of controlled swap gate"""
self.assertEqual(SwapGate().control(), CSwapGate())
