Truncate file to trigger zlib error

Signed-off-by: Lauris Kaplinski <lauris@raulwalter.com>

Author: Lauris Kaplinski

test/libcdoc_boost.cpp

@@ -491,6 +491,25 @@ BOOST_FIXTURE_TEST_CASE_WITH_DECOR(CDoc2DecryptErrors, DecryptFixture,
     BOOST_TEST(rdr->nextFile(fi) == libcdoc::OK);
     BOOST_TEST(rdr->finishDecryption() == libcdoc::CRYPTO_ERROR);
     delete rdr;
+
+    // Truncate file, should result zlib error
+    std::filesystem::resize_file(container, fsize - 32);
+    rdr = libcdoc::CDocReader::createReader(container, &conf, &crypto, nullptr);
+    BOOST_TEST(rdr != nullptr, "Cannot create reader");
+    BOOST_TEST(rdr->getFMK(fmk, 0) == libcdoc::OK);
+    BOOST_TEST(rdr->beginDecryption(fmk) == libcdoc::OK);
+    libcdoc::result_t rv = rdr->nextFile(fi);
+    BOOST_TEST(((rv == libcdoc::OK) || (rv == libcdoc::ZLIB_ERROR)));
+    for (int i = 0; i < 4; i++) {
+        rv = rdr->readData(buf, 256);
+        BOOST_TEST(((rv == 256) || (rv == libcdoc::ZLIB_ERROR)));
+    }
+    rv = rdr->nextFile(fi);
+    BOOST_TEST(((rv == libcdoc::OK) || (rv == libcdoc::ZLIB_ERROR)));
+    rv = rdr->readData(buf, 256);
+    BOOST_TEST(((rv == 255) || (rv == libcdoc::ZLIB_ERROR)));
+    BOOST_TEST(rdr->finishDecryption() == libcdoc::CRYPTO_ERROR);
+    delete rdr;
 }
 BOOST_AUTO_TEST_SUITE_END()