private String digest(String fileName) throws IOException {
        return digest(ZipDetectionTest.class.getResourceAsStream("/test-documents/" + fileName));
    }
Test cases for detecting zip-based files.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-zip-commons/src/test/java/org/apache/tika/detect/zip/ZipDetectionTest.java