}

            @Override
            public String getContentType() {
                return null;
            }

            @Override
            public jakarta.servlet.ServletInputStream getInputStream() throws IOException {
                return null;
            }

            @Override
            public String getParameter(String name) {
                return null;
            }

        }

        @Test
        void testGetInputStream() throws IOException {
            // Act
            var inputStream = smbFile.getInputStream();

            // Assert
            assertNotNull(inputStream);
            verify(smbFile).openUnshared(0, // SmbConstants.O_RDONLY = 0x01, but SmbFileInputStream uses 0

        @Override
        public String getContentType() {
            throw new UnsupportedOperationException();
        }

        @Override
        public jakarta.servlet.ServletInputStream getInputStream() {
            throw new UnsupportedOperationException();
        }

        @Override
        public java.util.Enumeration<String> getParameterNames() {
            throw new UnsupportedOperationException();

        verifyToken(() -> uploadpage(form.dictId));
        return kuromojiService.getKuromojiFile(form.dictId).map(file -> {
            try (InputStream inputStream = form.kuromojiFile.getInputStream()) {
                file.update(inputStream);
            } catch (final IOException e) {
                logger.warn("Failed to process a request.", e);

        }

        @Override
        public java.io.OutputStream getOutputStream() {
            return null;
        }

        @Override
        public java.io.InputStream getInputStream() {
            return new java.io.ByteArrayInputStream(new byte[0]);
        }

        @Override
        public java.io.InputStream getErrorStream() {

        verifyToken(() -> uploadpage(form.dictId));
        return stemmerOverrideService.getStemmerOverrideFile(form.dictId).map(file -> {
            try (InputStream inputStream = form.stemmerOverrideFile.getInputStream()) {
                file.update(inputStream);
            } catch (final IOException e) {
                logger.warn("Failed to process a request.", e);

        verifyToken(this::asUploadHtml);
        CommonPoolUtil.execute(() -> {
            try (Reader reader = new BufferedReader(new InputStreamReader(form.elevateWordFile.getInputStream(), getCsvEncoding()))) {
                elevateWordService.importCsv(reader);
                suggestHelper.deleteAllElevateWord(false);
                suggestHelper.storeAllElevateWords(false);

        }

        @Override
        public java.io.OutputStream getOutputStream() {
            return null;
        }

        @Override
        public java.io.InputStream getInputStream() {
            return null;
        }

        @Override
        public java.io.InputStream getErrorStream() {
            return null;
        }
    }

    // Mock FessConfig implementation

            }

            @Override
            public String getContentType() {
                return null;
            }

            @Override
            public jakarta.servlet.ServletInputStream getInputStream() {
                return null;
            }

            @Override
            public String getParameter(String name) {
                return null;
            }

            @Override

    }
    
    // Simulate network disconnection
    file.getTree().getSession().getTransport().disconnect();
    
    // Try to read - should trigger reconnection
    try (InputStream is = file.getInputStream()) {
        byte[] buffer = new byte[9];
        is.read(buffer);
        assertEquals("test data", new String(buffer));
    }
}

@Test