@Test
    void verifyOperation() throws Throwable {
        val request = new MockHttpServletRequest();
        val response = new MockHttpServletResponse();
        val noOp = DeviceFingerprintExtractor.noOp();
        assertEquals(Ordered.LOWEST_PRECEDENCE, noOp.getOrder());
        assertTrue(noOp.extract(RegisteredServiceTestUtils.getAuthentication(), request, response).isEmpty());
    }
This is {@link DeviceFingerprintExtractorTests}.

@author Misagh Moayyed
@since 6.3.0
support/cas-server-support-trusted-mfa/src/test/java/org/apereo/cas/trusted/authentication/storage/fingerprint/DeviceFingerprintExtractorTests.java