def assert_address_field(self, idx, field, value):
""" Check that result rows`idx` has a field `field` with value `value`
in its address. If idx is None, then all results are checked.
def assert_address_field(self, idx, field, value):
""" Check that result rows`idx` has a field `field` with value `value`
in its address. If idx is None, then all results are checked.