Add a test which changes the CompressionMethod of an item (#78)

Author: dellis1972

CompressionMethod.cs

@@ -121,6 +121,26 @@ public enum CompressionMethod : short
 /// </summary>
 LZ77=19,
 
+/// <summary>
+/// LZMA2 Compressed data
+/// </summary>
+LZMA2=33,
+
+/// <summary>
+/// Zstandard compressed data
+/// </summary>
+ZSTD=93,
+
+/// <summary>
+/// XZ compressed data
+/// </summary>
+XZ=95,
+
+/// <summary>
+/// Compressed Jpeg data
+/// </summary>
+JPEG=96,
+
 /// <summary>
 /// WavPack compressed data
 /// </summary>

LibZipSharp.UnitTest/LibZipSharp.UnitTest.csproj

@@ -29,6 +29,9 @@
  <Link>libzip.dll</Link>
  <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
  </None>
+ <NoneInclude="packaged_resources">
+ <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+ </None>
  </ItemGroup>
 
  <TargetName="RunNunitTests"DependsOnTargets="Build">

LibZipSharp.UnitTest/ZipTests.cs

@@ -192,6 +192,44 @@ public void SmallTextFile ()
 }
 }
 
+[Test]
+publicvoidUpdateEntryCompressionMethod()
+{
+varzipStream=newMemoryStream();
+varencoding=Encoding.UTF8;
+using(varzip=ZipArchive.Create(zipStream)){
+zip.AddEntry("foo","bar",encoding,CompressionMethod.Deflate);
+}
+using(varzip=ZipArchive.Open(zipStream)){
+varentry=zip.ReadEntry("foo");
+Assert.IsNotNull(entry,"Entry 'foo' should exist!");
+AssertEntryIsValid(entry,"foo",compression:CompressionMethod.Deflate);
+using(varstream=newMemoryStream()){
+entry.Extract(stream);
+stream.Position=0;
+Assert.AreEqual("bar",encoding.GetString(stream.ToArray()));
+}
+zip.AddEntry("foo","foo",encoding,CompressionMethod.Store);
+entry=zip.ReadEntry("foo");
+AssertEntryIsValid(entry,"foo",compression:CompressionMethod.Store);
+}
+}
+
+[Test]
+publicvoidCheckForUnknownCompressionMethods()
+{
+stringfilePath=Path.GetFullPath("packaged_resources");
+if(!File.Exists(filePath)){
+filePath=Path.GetFullPath(Path.Combine("LibZipSharp.UnitTest","packaged_resources"));
+}
+using(varzip=ZipArchive.Open(filePath,FileMode.Open)){
+foreach(vareinzip){
+Console.WriteLine($"{e.FullName} is {e.CompressionMethod}");
+Assert.AreNotEqual(CompressionMethod.Unknown,e.CompressionMethod,"Compression Method should not be Unknown.");
+}
+}
+}
+
 [TestCase(false)]
 [TestCase(true)]
 publicvoidEnumerateSkipDeletedEntries(booldeleteFromExistingFile)

LibZipSharp.UnitTest/packaged_resources

@@ -1,5 +1,5 @@
 <ProjectDefaultTargets="Build"ToolsVersion="4.0"xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
- <_LibZipSharpNugetVersion>1.0.21</_LibZipSharpNugetVersion>
+ <_LibZipSharpNugetVersion>1.0.22</_LibZipSharpNugetVersion>
  </PropertyGroup>
 </Project>

LibZipSharp.props

@@ -47,17 +47,28 @@ public struct zip_source_args_seek_t
 publicintwhence;
 };
 
+[StructLayout(LayoutKind.Explicit)]
 publicstructzip_stat_t
 {
+[FieldOffset(0)]
 publicUInt64valid;/* which fields have valid values */
+[FieldOffset(8)]
 publicIntPtrname;/* name of the file (char *) */
+[FieldOffset(16)]
 publicUInt64index;/* index within archive */
+[FieldOffset(24)]
 publicUInt64size;/* size of file (uncompressed) */
+[FieldOffset(32)]
 publicUInt64comp_size;/* size of file (compressed) */
+[FieldOffset(40)]
 publicIntPtrmtime;/* modification time (time_t) */
+[FieldOffset(48)]
 publicUInt32crc;/* crc of file data */
+[FieldOffset(52)]
 publicInt16comp_method;/* compression method used */
+[FieldOffset(56)]
 publicUInt16encryption_method;/* encryption method used */
+[FieldOffset(60)]
 publicUInt32flags;/* reserved for future use */
 };