@Test
    public void testNoValuesSet() {
        var facebookClient = newFacebookClient();
        val clients = new Clients(facebookClient);
        clients.findAllClients();
        assertNull(facebookClient.getCallbackUrl());
        assertNull(facebookClient.getUrlResolver());
        assertNull(facebookClient.getCallbackUrlResolver());
        assertNull(facebookClient.getAjaxRequestResolver());
        assertEquals(0, facebookClient.getAuthorizationGenerators().size());
    }
This class tests the {@link Clients} class.

@author Jerome Leleu
@since 1.3.0
pac4j-core/src/test/java/org/pac4j/core/client/ClientsTests.java