void shouldImplementFileSystemInformation() {
            assertTrue(FileSystemInformation.class.isAssignableFrom(FileFsFullSizeInformation.class));
        }

        @Test
        @DisplayName("Should return correct file system information class")
        void shouldReturnCorrectFileSystemInformationClass() {
            assertEquals(FileSystemInformation.FS_FULL_SIZE_INFO, fileFsFullSizeInfo.getFileSystemInformationClass());
        }
    }

        int expectedBytes = 12 + (fileName.length() * 2); // Unicode is 2 bytes per char
        assertEquals(expectedBytes, bytesRead);
    }

    @Test
    @DisplayName("Test getAction returns correct value")
    void testGetAction() throws SMBProtocolDecodingException {
        int expectedAction = FileNotifyInformation.FILE_ACTION_RENAMED_NEW_NAME;

    @Test
    @DisplayName("happy: constructor sets command correctly")
    void testConstructorSetsCommand() {
        SmbComClose close = new SmbComClose(1, 12345L);
        assertEquals(SMB_COM_CLOSE, close.command, "command should be SMB_COM_CLOSE after construction");
    }

    /**
     * Verify that writeParameterWordsWireFormat writes the file id and the
     * unsigned time correctly.  The last write time is zero which should be

        testState = Smb2LeaseState.SMB2_LEASE_READ_WRITE;
        leaseContext = new LeaseV1CreateContextRequest(testKey, testState);
    }

    @Test
    @DisplayName("Should have correct context name")
    void testContextName() {
        assertArrayEquals("RqLs".getBytes(), leaseContext.getName());
        assertEquals("RqLs", LeaseV1CreateContextRequest.CONTEXT_NAME);
    }

    @Test

		t.Errorf("No error should happen when find embedded pointer type, but got %v", err)
	}

	if hnPost.Title != "embedded_pointer_type" {
		t.Errorf("Should find correct value for embedded pointer type")
	}

	if hnPost.Author != nil {
		t.Errorf("Expected to get back a nil Author but got: %v", hnPost.Author)
	}

	now := time.Now().Round(time.Second)
	NewPost := HNPost{

            request.writeBytesWireFormat(buffer, startIndex);

            // Verify data is at correct position
            for (int i = 0; i < data.length; i++) {
                assertEquals((byte) 0xAB, buffer[startIndex + 48 + i]);
            }
        }

        @Test
        @DisplayName("Should handle partial data buffer correctly")
        void testPartialDataBuffer() {
            byte[] fullData = new byte[200];

        }
    }

    @Nested
    @DisplayName("Command Constants Tests")
    class CommandConstantsTests {

        @Test
        @DisplayName("Should have correct command constants")
        void testCommandConstants() {
            assertEquals(0x00, ServerMessageBlock2.SMB2_NEGOTIATE);
            assertEquals(0x01, ServerMessageBlock2.SMB2_SESSION_SETUP);

        assertTrue(result.contains("informationLevel=0x101"), "String should contain the correct information level.");
        assertTrue(result.contains("filename=test.txt"), "String should contain the correct filename.");
        assertTrue(result.endsWith("]"), "String should end with a closing bracket.");
    }

        }
    }

    @Nested
    @DisplayName("Size Calculation Tests")
    class SizeTests {

        @ParameterizedTest
        @DisplayName("Should calculate correct size for various path lengths")
        @CsvSource({ "'', 4", "'a', 6", "'\\\\', 8", "'\\\\server', 20", "'\\\\server\\share', 32", "'\\\\server\\share\\path', 42",

You will see the automatic API docs for the sub-application, including only its own _path operations_, all under the correct sub-path prefix `/subapi`:

<img src="/img/tutorial/sub-applications/image02.png">

If you try interacting with any of the two user interfaces, they will work correctly, because the browser will be able to talk to each specific app or sub-app.

### Technical Details: `root_path` { #technical-details-root-path }