Add additional per-chunk read/write test

src/ZlibStream/Deflate.cs

@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
-// Uncomment to use DeflateQuick
+// Uncomment to use DeflateQuick - Probs should remove as compression is really poor.
 // TODO: Make an option.
 // #define USE_QUICK
 using System;
@@ -281,7 +281,7 @@ namespace SixLabors.ZlibStream
             }
 
 #if USE_QUICK
-            if (level == ZlibCompressionLevel.ZBESTSPEED)
+            if (level == CompressionLevel.BestSpeed)
             {
                 windowBits = 13;
             }

src/ZlibStream/ZlibStream.csproj

@@ -17,7 +17,7 @@
   <Choose>
     <When Condition="'$(SIXLABORS_TESTING)' == 'true'">
       <PropertyGroup>
-        <TargetFrameworks>net5.0;netcoreapp3.1;netcoreapp2.1;netstandard2.1;netstandard2.0;netstandard1.3;net472</TargetFrameworks>
+        <TargetFrameworks>net6.0;netcoreapp3.1;netcoreapp2.1;netstandard2.1;netstandard2.0;netstandard1.3;net472</TargetFrameworks>
       </PropertyGroup>
     </When>
     <Otherwise>

tests/ZlibStream.Benchmarks/ZlibStream.Benchmarks.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <AssemblyName>ZlibStream.Benchmarks</AssemblyName>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>net5.0;netcoreapp3.1;netcoreapp2.1;net472</TargetFrameworks>
+    <TargetFrameworks>net6.0;netcoreapp3.1;netcoreapp2.1;net472</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <!--Used to hide test project from dotnet test-->
     <IsTestProject>false</IsTestProject>

tests/ZlibStream.Tests/ZlibStreamTests.Roundtrip.cs

@@ -9,7 +9,7 @@ using Xunit;
 
 namespace ZlibStream.Tests
 {
-    public partial class ZlibStreamTests
+    public class ZlibStreamTests
     {
         [Theory]
         [InlineData(CompressionLevel.NoCompression)]
@@ -49,10 +49,69 @@ namespace ZlibStream.Tests
 
                     compressed.Position = 0;
 
-                    using (var inflate = new ZlibInputStream(compressed))
-                    {
+                    using var inflate = new ZlibInputStream(compressed);
                     inflate.Read(actual, 0, actual.Length);
                 }
+
+                for (int i = 0; i < expected.Length; i++)
+                {
+                    byte e = expected[i];
+                    byte r = reference[i];
+                    byte a = actual[i];
+
+                    Assert.Equal(e, r);
+                    Assert.Equal(e, a);
+                }
+            }
+        }
+
+        [Theory]
+        [InlineData(CompressionLevel.NoCompression)]
+        [InlineData(CompressionLevel.Level1)]
+        [InlineData(CompressionLevel.Level2)]
+        [InlineData(CompressionLevel.Level3)]
+        [InlineData(CompressionLevel.Level4)]
+        [InlineData(CompressionLevel.Level5)]
+        [InlineData(CompressionLevel.Level6)]
+        [InlineData(CompressionLevel.Level7)]
+        [InlineData(CompressionLevel.BestCompression)]
+        [InlineData(CompressionLevel.DefaultCompression)]
+        public void EncodeDecodePerChunk(CompressionLevel level)
+        {
+            foreach (CompressionStrategy strategy in (CompressionStrategy[])Enum.GetValues(typeof(CompressionStrategy)))
+            {
+                const int count = 2 * 4096 * 4;
+                const int chunk = 2 * 4096;
+                byte[] expected = GetBuffer(count);
+                byte[] reference = new byte[count];
+                byte[] actual = new byte[count];
+
+                using (var compressed = new MemoryStream())
+                {
+                    var options = new ZlibOptions { CompressionStrategy = strategy, CompressionLevel = level };
+                    using (var deflate = new ZlibOutputStream(compressed, options))
+                    {
+                        for (int i = 0; i < expected.Length; i += chunk)
+                        {
+                            deflate.Write(expected, i, chunk);
+                        }
+                    }
+
+                    compressed.Position = 0;
+
+                    using (var refInflate = new InflaterInputStream(compressed))
+                    {
+                        refInflate.IsStreamOwner = false;
+                        refInflate.Read(reference, 0, reference.Length);
+                    }
+
+                    compressed.Position = 0;
+
+                    using var inflate = new ZlibInputStream(compressed);
+                    for (int i = 0; i < expected.Length; i += chunk)
+                    {
+                        inflate.Read(actual, i, chunk);
+                    }
                 }
 
                 for (int i = 0; i < expected.Length; i++)
@@ -72,33 +131,29 @@ namespace ZlibStream.Tests
         public void DeflateProfileTest()
         {
             const int count = 1000 * 1000 * 4;
-            var expected = GetBuffer(count);
+            byte[] expected = GetBuffer(count);
 
-            using (var compressed = new MemoryStream())
-            using (var deflate = new ZlibOutputStream(compressed, CompressionLevel.Level6))
-            {
+            using var compressed = new MemoryStream();
+            using var deflate = new ZlibOutputStream(compressed, CompressionLevel.Level6);
             deflate.Write(expected, 0, expected.Length);
         }
-        }
 
         [Fact]
         public void DeflateMemoryProfileTest()
         {
-            var expected = GetImageBytes(3500, 3500);
+            byte[] expected = GetImageBytes(3500, 3500);
 
-            using (var compressed = new MemoryStream())
-            using (var deflate = new ZlibOutputStream(compressed, CompressionLevel.Level1))
-            {
+            using var compressed = new MemoryStream();
+            using var deflate = new ZlibOutputStream(compressed, CompressionLevel.Level1);
             deflate.Write(expected, 0, expected.Length);
         }
-        }
 
         private static byte[] GetImageBytes(int width, int height)
         {
-            var bytes = new byte[width * height * 4];
-            for (var y = 0; y < height; y++)
+            byte[] bytes = new byte[width * height * 4];
+            for (int y = 0; y < height; y++)
             {
-                for (var x = 0; x < width * 4; x += 4)
+                for (int x = 0; x < width * 4; x += 4)
                 {
                     int i = 4 * y * width;
                     bytes[i + x] = (byte)((x + y) % 256); // R
@@ -113,7 +168,7 @@ namespace ZlibStream.Tests
 
         private static byte[] GetBuffer(int length)
         {
-            var data = new byte[length];
+            byte[] data = new byte[length];
             new Random(1).NextBytes(data);
 
             return data;