@Test
    void verifySupports() {
        assertFalse(this.resolver.supports(null));
        assertTrue(this.resolver.supports(this.spnegoCredentials));
        assertFalse(this.resolver.supports(new UsernamePasswordCredential()));
    }
@author Marc-Antoine Garrigue
@author Arnaud Lesueur
@since 3.1
support/cas-server-support-spnego/src/test/java/org/apereo/cas/support/spnego/authentication/principal/SpnegoCredentialsToPrincipalResolverTests.java