@Test
    void verifyResolverResolvesWithFileUri() {
        val props = new SamlIdPProperties();
        props.getMetadata().getFileSystem().setLocation("file:/etc/cas/saml");
        val resolver = new JsonResourceMetadataResolver(props, openSamlConfigBean);
        assertNotNull(resolver);
    }
Make sure default file:/etc/cas/saml URI syntax is parsed correctly.
support/cas-server-support-saml-idp-metadata/src/test/java/org/apereo/cas/support/saml/services/idp/metadata/cache/resolver/JsonResourceMetadataResolverTests.java