@Test
    void verifyBlank() {
        val definition = tenantExtractor.extract(StringUtils.EMPTY);
        assertFalse(definition.isPresent());
    }
This is {@link DefaultTenantExtractorTests}.

@author Misagh Moayyed
@since 7.2.0
core/cas-server-core-multitenancy/src/test/java/org/apereo/cas/multitenancy/DefaultTenantExtractorTests.java