def METHOD_NAME(mocker, amount, currency, expected):
    nai = mocker.patch('indico_payment_paypal.controllers.notify_amount_inconsistency')
    rh = RHPaypalIPN()
    rh.event = MagicMock(id=1)
    rh.registration = MagicMock()
    rh.registration.price = 13.37
    rh.registration.currency = currency
    request.form = {'mc_gross': amount, 'mc_currency': 'EUR'}
    with PaypalPaymentPlugin.instance.plugin_context():
        assert rh._verify_amount() == expected
        assert nai.called == (not expected)