baseline: OpenMU upstream b5a0961 (fresh source)

tests/MUnique.OpenMU.Network.Tests/PacketTwisterTest.cs

@@ -0,0 +1,41 @@
+// <copyright file="PacketTwisterTest.cs" company="MUnique">
+// Licensed under the MIT License. See LICENSE file in the project root for full license information.
+// </copyright>
+
+namespace MUnique.OpenMU.Network.Tests;
+
+using MUnique.OpenMU.Network.PacketTwister;
+
+/// <summary>
+/// Tests for the  <see cref="PacketTwistRunner"/>.
+/// </summary>
+[TestFixture]
+public class PacketTwisterTest
+{
+    /// <summary>
+    /// Tests encryption and decryption using the <see cref="PacketTwistRunner"/>.
+    /// </summary>
+    [Test]
+    public void EncryptDecryptWithPacketTwister()
+    {
+        var decrypted = Convert.FromBase64String("w7gAudHEjjSP53H6Rkp3oXj7B9z+rVDR2f0Is4bvsIsUL3RM/aTDB2FX9YG3Hkboy1Z1JThot558MeDTvNuunzfl5RbWK6TTOP97prjPGbq3IOcweopTq3fVz8vD8EuFqVVJ0jgvEZ+xoe047RHmrRgmG5zzfSWtkTmeAVzZD0i09f1jhUeBiA5HfticGr5m7iGzndSvkSwvm0D/kRBD15GlhPgTgyfQpJONrP5NEHd7NxI6JnJzBQ==");
+        var packetTwister = new PacketTwister.PacketTwistRunner();
+        for (byte packetType = 0; packetType < byte.MaxValue; packetType++)
+        {
+            decrypted[2] = packetType;
+            var result = decrypted.ToArray();
+            packetTwister.Encrypt(result);
+            packetTwister.Decrypt(result);
+            CompareArrays(decrypted, result);
+        }
+    }
+
+    private static void CompareArrays(byte[] expected, byte[] actual)
+    {
+        Assert.That(actual.Length, Is.EqualTo(expected.Length));
+        for (int i = 0; i < actual.Length; i++)
+        {
+            Assert.That(actual[i], Is.EqualTo(expected[i]), "index {0}, packet type {1}", i, expected[expected.GetPacketHeaderSize()]);
+        }
+    }
+}