Merge pull request #40 from Cysharp/feature/FixRoundRobinOrder

Fix to retrieve from the beginning of the pool

Author: mayuki

src/LogicLooper/RoundRobinLogicLooperPoolBalancer.cs

@@ -2,7 +2,7 @@
 
 public class RoundRobinLogicLooperPoolBalancer : ILogicLooperPoolBalancer
 {
-    private int _index = 0;
+    private int _index = -1;
 
     public static ILogicLooperPoolBalancer Instance { get; } = new RoundRobinLogicLooperPoolBalancer();
 

test/LogicLooper.Test/RoundRobinLogicLooperPoolBalancerTest.cs

@@ -0,0 +1,22 @@
+using Cysharp.Threading;
+
+namespace LogicLooper.Test;
+
+public class RoundRobinLogicLooperPoolBalancerTest
+{
+    [Fact]
+    public void GetPooledLooper_ReturnsLoopersInRoundRobinOrder()
+    {
+        var balancer = RoundRobinLogicLooperPoolBalancer.Instance;
+        var loopers = new ILogicLooper[]
+        {
+            new ManualLogicLooper(1),
+            new ManualLogicLooper(2),
+            new ManualLogicLooper(3)
+        };
+        Assert.Equal(loopers[0], balancer.GetPooledLooper(loopers));
+        Assert.Equal(loopers[1], balancer.GetPooledLooper(loopers));
+        Assert.Equal(loopers[2], balancer.GetPooledLooper(loopers));
+        Assert.Equal(loopers[0], balancer.GetPooledLooper(loopers));
+    }
+}