private PacDataInputStream createInputStream(byte[] data) throws IOException {
        return new PacDataInputStream(new ByteArrayInputStream(data));
    }

    @Test
    public void testAlign() throws IOException {
        // Test alignment from position 1 to 4
        byte[] data = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05 };
        PacDataInputStream pdis = createInputStream(data);
        pdis.readByte(); // position is 1

        if (mimeType != null) {
            final Extractor extractor = extractorFactory.getExtractor(mimeType);
            if (extractor != null) {
                try (COSInputStream is = embeddedFile.createInputStream()) {
                    final Map<String, String> map = new HashMap<>();
                    map.put(ExtractData.RESOURCE_NAME_KEY, filename);