def test_gate_decomposition_properties(self):
"""Verify decompositions are accessible via gate properties."""
qc = QuantumCircuit(2)
qc.h(0)
qc.cx(0, 1)
from qiskit.circuit.equivalence_library import SessionEquivalenceLibrary as sel
gate = circuit_to_gate(qc, equivalence_library=sel)
decomps = gate.decompositions
self.assertEqual(len(decomps), 1)
self.assertEqual(decomps[0], qc)
qc2 = QuantumCircuit(2)
qc2.h([0, 1])
qc2.cz(0, 1)
qc2.h(1)
gate.add_decomposition(qc2)
decomps = gate.decompositions
self.assertEqual(len(decomps), 2)
self.assertEqual(decomps[0], qc)
self.assertEqual(decomps[1], qc2)
gate.decompositions = [qc2]
decomps = gate.decompositions
self.assertEqual(len(decomps), 1)
self.assertEqual(decomps[0], qc2)
def test_converter_gate_registration(self):
"""Verify converters register gates in session equivalence library."""
qc_gate = QuantumCircuit(2)
qc_gate.h(0)
qc_gate.cx(0, 1)
from qiskit.circuit.equivalence_library import SessionEquivalenceLibrary as sel
bell_gate = circuit_to_gate(qc_gate, equivalence_library=sel)
qc_inst = QuantumCircuit(2)
qc_inst.h(0)
qc_inst.cx(0, 1)
bell_inst = circuit_to_instruction(qc_inst, equivalence_library=sel)
gate_entry = sel.get_entry(bell_gate)
inst_entry = sel.get_entry(bell_inst)
self.assertEqual(len(gate_entry), 1)
self.assertEqual(len(inst_entry), 1)
self.assertEqual(gate_entry[0], qc_gate)
self.assertEqual(inst_entry[0], qc_inst)