def test_add_registerless_bits(self):
"""Verify we can add are retrieve bits without an associated register."""
qubits = [Qubit() for _ in range(5)]
clbits = [Clbit() for _ in range(3)]
dag = DAGDependency()
dag.add_qubits(qubits)
dag.add_clbits(clbits)
self.assertEqual(dag.qubits, qubits)
self.assertEqual(dag.clbits, clbits)
def test_add_duplicate_registerless_bits(self):
"""Verify we raise when adding a bit already present in the circuit."""
qubits = [Qubit() for _ in range(5)]
clbits = [Clbit() for _ in range(3)]
dag = DAGDependency()
dag.add_qubits(qubits)
dag.add_clbits(clbits)
with self.assertRaisesRegex(DAGDependencyError, r"duplicate qubits"):
dag.add_qubits(qubits[:1])
with self.assertRaisesRegex(DAGDependencyError, r"duplicate clbits"):
dag.add_clbits(clbits[:1])
