    @Test
    void should_return_no_result_on_decrypting_failure() {

        // given
        given(tokenDecrypter.decrypt(any(com.nimbusds.jwt.JWT.class))).willReturn(decryptedToken);
        given(decryptedToken.isValid()).willReturn(false);

        // when
        final Stigma stigma = stigmaExtractor.extractStigma(STIGMA_TOKEN);

        // then
        assertThat(stigma).isNull();
        verifyNoInteractions(tokenParser);
    }