var level1 Level1
	if err := DB.Preload("Level2s").Preload("Level2s.Level3s").Preload("Level2s.Level3s.Level4s").First(&level1).Error; err != nil {
		t.Error(err)
	}
}

func TestManyToManyPreloadForPointer(t *testing.T) {
	type (
		Level1 struct {
			ID    uint
			Value string
		}
		Level2 struct {
			ID      uint
			Value   string
			Level1s []*Level1 `gorm:"many2many:levels;"`
		}
	)

   * Returns the ancestor of the current domain at the given number of levels "higher" (rightward)
   * in the subdomain list. The number of levels must be non-negative, and less than {@code N-1},
   * where {@code N} is the number of parts in the domain.
   *
   * <p>TODO: Reasonable candidate for addition to public API.
   */
  private InternetDomainName ancestor(int levels) {

    // optimistically fill index position with elements from lower levels,
    // moving the hole down. In most cases this reduces the number of
    // comparisons with toTrickle, but in some cases we will need to bubble it
    // all the way up again.
    int vacated = heap.fillHoleAt(index);
    // Try to see if toTrickle can be bubbled up min levels.
    int bubbledTo = heap.bubbleUpAlternatingLevels(vacated, toTrickle);

        // Should read nothing (returns 0)
        assertEquals(0, read);
    }

    @Test
    void testMapInformationLevel() {
        // Test valid information levels
        assertEquals(0x0101, Trans2QueryPathInformation.mapInformationLevel(FileInformation.FILE_BASIC_INFO));
        assertEquals(0x0102, Trans2QueryPathInformation.mapInformationLevel(FileInformation.FILE_STANDARD_INFO));

    // optimistically fill index position with elements from lower levels,
    // moving the hole down. In most cases this reduces the number of
    // comparisons with toTrickle, but in some cases we will need to bubble it
    // all the way up again.
    int vacated = heap.fillHoleAt(index);
    // Try to see if toTrickle can be bubbled up min levels.
    int bubbledTo = heap.bubbleUpAlternatingLevels(vacated, toTrickle);

            assertEquals("Expected structureSize = 24", exception.getMessage());
        }

        @ParameterizedTest
        @DisplayName("Should read different oplock levels correctly")
        @ValueSource(bytes = { 0x00, 0x01, 0x02, 0x08, (byte) 0xFF })
        void testReadDifferentOplockLevels(byte oplockLevel) throws Exception {

            assertTrue(s);
        }
    }

    @DisplayName("Test exception handling for invalid information levels")
    @ParameterizedTest
    @ValueSource(ints = { 0, 1, 2, 4, 5, 6, 8, 100, -2, -100, Integer.MIN_VALUE, Integer.MAX_VALUE })
    void testInvalidInformationLevels(int invalidLevel) {
        // Skip valid levels

        assertEquals("anotherComponent", exception3.getComponentName());
    }

    @Test
    public void test_exceptionChaining() {
        // Test exception chaining with multiple levels
        Exception rootCause = new Exception("Root cause");
        RuntimeException middleCause = new RuntimeException("Middle cause", rootCause);

            FileSystemInformation.FS_FULL_SIZE_INFO })
    void testConstructorWithDifferentInformationLevels(int informationLevel) {
        // Test constructor with different information levels
        response = new Trans2QueryFSInformationResponse(config, informationLevel);

        assertNotNull(response);
        assertEquals(informationLevel, response.getInformationLevel());

 *       <ul>
 *         <li>2 levels: average of 64ns per lock()/unlock()
 *         <li>3 levels: average of 77ns per lock()/unlock()
 *         <li>4 levels: average of 99ns per lock()/unlock()
 *         <li>5 levels: average of 103ns per lock()/unlock()
 *         <li>10 levels: average of 184ns per lock()/unlock()
 *         <li>20 levels: average of 393ns per lock()/unlock()
 *       </ul>
 * </ul>