From 9a5ceb34d169431fba8cf90dca79e0a448e88bde Mon Sep 17 00:00:00 2001
From: Bond_009 <bond.009@outlook.com>
Date: Wed, 13 Jan 2021 01:11:12 +0100
Subject: Improve WebSocket Deserialization

---
 .../HttpServer/WebSocketConnectionTests.cs         | 69 ++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 tests/Jellyfin.Server.Implementations.Tests/HttpServer/WebSocketConnectionTests.cs

(limited to 'tests/Jellyfin.Server.Implementations.Tests/HttpServer/WebSocketConnectionTests.cs')

diff --git a/tests/Jellyfin.Server.Implementations.Tests/HttpServer/WebSocketConnectionTests.cs b/tests/Jellyfin.Server.Implementations.Tests/HttpServer/WebSocketConnectionTests.cs
new file mode 100644
index 000000000..1ce2096ea
--- /dev/null
+++ b/tests/Jellyfin.Server.Implementations.Tests/HttpServer/WebSocketConnectionTests.cs
@@ -0,0 +1,69 @@
+using System;
+using System.Buffers;
+using System.IO;
+using System.Text.Json;
+using Emby.Server.Implementations.HttpServer;
+using Microsoft.Extensions.Logging.Abstractions;
+using Xunit;
+
+namespace Jellyfin.Server.Implementations.Tests.HttpServer
+{
+    public class WebSocketConnectionTests
+    {
+        [Fact]
+        public void DeserializeWebSocketMessage_SingleSegment_Success()
+        {
+            var con = new WebSocketConnection(new NullLogger<WebSocketConnection>(), null!, null!, null!);
+            var bytes = File.ReadAllBytes("Test Data/HttpServer/ForceKeepAlive.json");
+            con.DeserializeWebSocketMessage(new ReadOnlySequence<byte>(bytes), out var bytesConsumed);
+            Assert.Equal(109, bytesConsumed);
+        }
+
+        [Fact]
+        public void DeserializeWebSocketMessage_MultipleSegments_Success()
+        {
+            const int SplitPos = 64;
+            var con = new WebSocketConnection(new NullLogger<WebSocketConnection>(), null!, null!, null!);
+            var bytes = File.ReadAllBytes("Test Data/HttpServer/ForceKeepAlive.json");
+            var seg1 = new BufferSegment(new Memory<byte>(bytes, 0, SplitPos));
+            var seg2 = seg1.Append(new Memory<byte>(bytes, SplitPos, bytes.Length - SplitPos));
+            con.DeserializeWebSocketMessage(new ReadOnlySequence<byte>(seg1, 0, seg2, seg2.Memory.Length - 1), out var bytesConsumed);
+            Assert.Equal(109, bytesConsumed);
+        }
+
+        [Fact]
+        public void DeserializeWebSocketMessage_ValidPartial_Success()
+        {
+            var con = new WebSocketConnection(new NullLogger<WebSocketConnection>(), null!, null!, null!);
+            var bytes = File.ReadAllBytes("Test Data/HttpServer/ValidPartial.json");
+            con.DeserializeWebSocketMessage(new ReadOnlySequence<byte>(bytes), out var bytesConsumed);
+            Assert.Equal(109, bytesConsumed);
+        }
+
+        [Fact]
+        public void DeserializeWebSocketMessage_Partial_ThrowJsonException()
+        {
+            var con = new WebSocketConnection(new NullLogger<WebSocketConnection>(), null!, null!, null!);
+            var bytes = File.ReadAllBytes("Test Data/HttpServer/Partial.json");
+            Assert.Throws<JsonException>(() => con.DeserializeWebSocketMessage(new ReadOnlySequence<byte>(bytes), out var bytesConsumed));
+        }
+
+        internal class BufferSegment : ReadOnlySequenceSegment<byte>
+        {
+            public BufferSegment(Memory<byte> memory)
+            {
+                Memory = memory;
+            }
+
+            public BufferSegment Append(Memory<byte> memory)
+            {
+                var segment = new BufferSegment(memory)
+                {
+                    RunningIndex = RunningIndex + Memory.Length
+                };
+                Next = segment;
+                return segment;
+            }
+        }
+    }
+}
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