def METHOD_NAME(self):
    """Test 1-qubit readout error"""
    # Test circuit: ideal outcome "11"
    probs = [[1, 0], [0, 1]]
    roerror_dict = {"type": "roerror", "operations": ["measure"], "probabilities": probs}
    roerror = ReadoutError(probs)
    self.assertEqual(roerror.number_of_qubits, 1)
    self.assertEqual(roerror.probabilities.tolist(), probs)
    self.assertEqual(roerror.to_dict(), roerror_dict)