test: passing average_nb_photons option to backend.run() is not allowed

tests/local/test_provider.py

@@ -1,4 +1,5 @@
 import pytest
+from qiskit import QuantumCircuit, transpile
 
 from qiskit_alice_bob_provider.local.backend import ProcessorSimulator
 from qiskit_alice_bob_provider.local.provider import AliceBobLocalProvider
@@ -26,3 +27,21 @@ def test_get_backend_change_nbar() -> None:
     proc = backend.target.durations()._proc
     assert isinstance(proc, PhysicalCatProcessor)
     assert proc._average_nb_photons == pytest.approx(9)
+
+
+def test_run_override_nbar_error() -> None:
+    """
+    Test that passing average_nb_photons option to backend.run() is not allowed
+    """
+    ab = AliceBobLocalProvider()
+
+    circ = QuantumCircuit(1, 1)
+    circ.reset(0)
+    circ.delay(30, 0, unit='us')
+    circ.measure(0, 0)
+
+    backend = ab.get_backend('EMU:6Q:PHYSICAL_CATS')
+    transpiled_circ = transpile(circ, backend)
+
+    with pytest.raises(ValueError):
+        _ = backend.run(transpiled_circ, shots=100, average_nb_photons=4)