User result = ldapChain.load(null);

        assertNull(result);
        assertNull(testLdapManager.appliedUser);
        assertTrue(testLdapManager.applyCalled);
    }

    public void test_load_modifiesUser() {
        // Test that load method modifies the user object through apply
        User user = createTestUser("testuser", "password123");
        testLdapManager.applyModifiesUser = true;