Merge pull request #820 from nolt/feature-bots

(cherry picked from commit b10de0645a869485fbb5771a739abd06b5708c2d)

tests/MUnique.OpenMU.Tests/BotSelfHealingTest.cs

@@ -0,0 +1,49 @@
+// <copyright file="BotSelfHealingTest.cs" company="MUnique">
+// Licensed under the MIT License. See LICENSE file in the project root for full license information.
+// </copyright>
+
+namespace MUnique.OpenMU.Tests;
+
+using MUnique.OpenMU.GameLogic.Bots;
+
+/// <summary>
+/// Tests how a bot reacts to its AI failing: the engine's attribute system is not thread-safe, and a
+/// lost race can corrupt a character's attribute graph for good - from then on every tick throws, the
+/// bot stops playing and floods the log. It asks for a restart, which rebuilds the graph and heals it.
+/// </summary>
+[TestFixture]
+public class BotSelfHealingTest
+{
+    /// <summary>
+    /// A tick failing now and then is simply skipped, like before - no restart.
+    /// </summary>
+    [Test]
+    public void SingleFailuresDoNotRestartTheBot()
+    {
+        var bot = new BotPlayer(GameContextTestHelper.CreateGameContext());
+
+        for (var i = 0; i < 100; i++)
+        {
+            bot.OnAiTickFailed();
+            bot.OnAiTickSucceeded();
+        }
+
+        Assert.That(bot.AwaitsFaultRestart, Is.False);
+    }
+
+    /// <summary>
+    /// A bot whose ticks keep failing is broken and asks the maintenance pass to restart it.
+    /// </summary>
+    [Test]
+    public void PersistentFailuresRestartTheBot()
+    {
+        var bot = new BotPlayer(GameContextTestHelper.CreateGameContext());
+
+        for (var i = 0; i < 20; i++)
+        {
+            bot.OnAiTickFailed();
+        }
+
+        Assert.That(bot.AwaitsFaultRestart, Is.True);
+    }
+}