Add a test for fixed deflate algorithm

DEVSIX-8385

Autoported commit.
Original commit hash: [0690f106b]

Author: vitali-pr

itext.tests/itext.io.tests/itext/io/util/ZlibUtilTest.cs

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+/*
+This file is part of the iText (R) project.
+Copyright (c) 1998-2024 Apryse Group NV
+Authors: Apryse Software.
+
+This program is offered under a commercial and under the AGPL license.
+For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.
+
+AGPL licensing:
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+using System;
+using System.IO;
+using iText.Commons.Utils;
+using iText.IO.Source;
+using iText.Test;
+
+namespace iText.IO.Util {
+    [NUnit.Framework.Category("IntegrationTest")]
+    public class ZlibUtilTest : ExtendedITextTest {
+        private static readonly String SOURCE_FOLDER = iText.Test.TestUtil.GetParentProjectDirectory(NUnit.Framework.TestContext
+            .CurrentContext.TestDirectory) + "/resources/itext/io/util/";
+
+        private static readonly String DESTINATION_FOLDER = NUnit.Framework.TestContext.CurrentContext.TestDirectory
+             + "/test/itext/io/util/";
+
+        [NUnit.Framework.SetUp]
+        public virtual void SetUp() {
+            CreateOrClearDestinationFolder(DESTINATION_FOLDER);
+        }
+
+        [NUnit.Framework.Test]
+        public virtual void ArrayIndexOutOfBoundsDeflateTest() {
+            // Test file is taken from https://issues.jenkins.io/browse/JENKINS-19473
+            // Unzip test file first
+            using (ZipFileReader reader = new ZipFileReader(SOURCE_FOLDER + "jzlib.zip")) {
+                using (Stream @is = reader.ReadFromZip("jzlib.fail")) {
+                    using (Stream os = FileUtil.GetFileOutputStream(DESTINATION_FOLDER + "jzlib.fail")) {
+                        byte[] buf = new byte[8192];
+                        int length;
+                        while ((length = @is.Read(buf)) != -1) {
+                            os.Write(buf, 0, length);
+                        }
+                    }
+                }
+            }
+            // Deflate it
+            using (Stream is_1 = FileUtil.GetInputStreamForFile(DESTINATION_FOLDER + "jzlib.fail")) {
+                using (Stream os_1 = FileUtil.GetFileOutputStream(DESTINATION_FOLDER + "jzlib.fail.zz")) {
+                    // -1 stands for default compression
+                    using (DeflaterOutputStream zip = new DeflaterOutputStream(os_1, -1)) {
+                        byte[] buf = new byte[8192];
+                        int length;
+                        while ((length = is_1.Read(buf)) != -1) {
+                            zip.Write(buf, 0, length);
+                        }
+                    }
+                }
+            }
+            NUnit.Framework.Assert.IsTrue(FileUtil.FileExists(DESTINATION_FOLDER + "jzlib.fail.zz"));
+            NUnit.Framework.Assert.IsTrue(FileUtil.IsFileNotEmpty(DESTINATION_FOLDER + "jzlib.fail.zz"));
+        }
+    }
+}

itext.tests/itext.io.tests/resources/itext/io/util/jzlib.zip

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-fdbc9708981652ad8791896bbe9ce095e3d83ef8
+0690f106b3f89d2681fc1aba527f4264e99ba407