assertFalse(ssoManager.available());

        // Verify all operations return null
        assertNull(ssoManager.getLoginCredential());
        assertNull(ssoManager.getResponse(SsoResponseType.METADATA));
        assertNull(ssoManager.getResponse(SsoResponseType.LOGOUT));
        assertNull(ssoManager.logout(FessUserBean.empty()));
    }

    // Test backward compatibility: aad -> entraid mapping
    @Test

  @CollectionSize.Require(ZERO)
  public void testEmptySetPollFirst() {
    assertNull(navigableSet.pollFirst());
  }

  @CollectionSize.Require(ZERO)
  public void testEmptySetNearby() {
    assertNull(navigableSet.lower(e0()));
    assertNull(navigableSet.floor(e0()));
    assertNull(navigableSet.ceiling(e0()));
    assertNull(navigableSet.higher(e0()));
  }

  @CollectionFeature.Require(SUPPORTS_REMOVE)

                (k, v) -> {
                  assertEquals(k3(), k);
                  assertNull(v);
                  return v3();
                }));
    expectAdded(e3());
    assertEquals(getNumElements() + 1, getMap().size());
  }

  @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE})
  public void testCompute_absentToAbsent() {
    assertNull(
        "Map.compute(absent, functionReturningNull) should return null",

                (k, v) -> {
                  assertEquals(k3(), k);
                  assertNull(v);
                  return v3();
                }));
    expectAdded(e3());
    assertEquals(getNumElements() + 1, getMap().size());
  }

  @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE})
  public void testCompute_absentToAbsent() {
    assertNull(
        "Map.compute(absent, functionReturningNull) should return null",

    // Test default constructor
    @Test
    public void test_constructor() {
        FacetInfo info = new FacetInfo();
        assertNull(info.field);
        assertNull(info.query);
        assertNull(info.size);
        assertNull(info.minDocCount);
        assertNull(info.sort);
        assertNull(info.missing);
    }

    // Test init method with various configurations
    @Test
    public void test_init_withAllFields() {

        assertNotNull(exception);
        assertEquals("Not Found: http://example.com/child Parent: http://example.com/parent", exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_constructor_withNullParentUrl() {
        // Test with null parent URL
        String parentUrl = null;
        String url = "http://example.com/child";

        ldapManager.init();

        // Edge cases that should return null
        assertNull(ldapManager.getSearchRoleName(null));
        assertNull(ldapManager.getSearchRoleName(""));
        assertNull(ldapManager.getSearchRoleName("   "));
        assertNull(ldapManager.getSearchRoleName("no_cn_prefix"));
        assertNull(ldapManager.getSearchRoleName("dn=test"));
    }

    @Test

        final StorageItem item = new StorageItem(null, null, false, 0L, null, null);

        assertNull(item.getName());
        assertNull(item.getPath());
        assertFalse(item.isDirectory());
        assertEquals(0L, item.getSize());
        assertNull(item.getLastModified());
        assertNull(item.getEncodedId());
    }

    public void test_emptyName() {

        assertNull(exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_constructor_withNullMessageAndCause() {
        // Test constructor with null message and null cause
        SsoLoginException exception = new SsoLoginException(null, null);

        assertNull(exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test

        Smb2LeaseKey key = leaseManager.requestLease(path, requestedState);
        assertNotNull(leaseManager.getLease(key));

        leaseManager.releaseLease(key);

        assertNull(leaseManager.getLease(key));
        assertNull(leaseManager.getLeaseByPath(path));
    }

    @Test
    @DisplayName("Should get lease by path")
    void testGetLeaseByPath() {
        String path = "/share/document.doc";