@Test
        void verifyUnknownDirectory() {
            val locator = new FileSystemSamlIdPMetadataLocator(CipherExecutor.noOpOfStringToString(),
                new File("/#**??#"), mock(Cache.class), applicationContext);
            assertThrows(IllegalArgumentException.class, locator::initialize);
        }
This is {@link FileSystemSamlIdPMetadataLocatorTests}.

@author Misagh Moayyed
@since 6.2.0
support/cas-server-support-saml-idp/src/test/java/org/apereo/cas/support/saml/idp/metadata/locator/FileSystemSamlIdPMetadataLocatorTests.java