def METHOD_NAME(self):
    """Test type"""
    credential_offer = CredentialOffer(
        comment="shaken, not stirred",
        credential_preview=self.preview,
        offers_attach=[
            AttachDecorator.data_base64(
                mapping=self.indy_offer,
                ident=ATTACH_DECO_IDS[CREDENTIAL_OFFER],
            )
        ],
    )
    assert credential_offer._type == DIDCommPrefix.qualify_current(CREDENTIAL_OFFER)