small fixes, renames

Azaion.Test/DictTest.cs

@@ -1,4 +1,5 @@
 using Azaion.Common.DTO;
+using FluentAssertions;
 using Xunit;
 
 namespace Azaion.Annotator.Test;
@@ -17,4 +18,25 @@ public class DictTest
             new YoloLabel(0, 1, 3, 2, 1)
         ];
     }
+
+    [Theory]
+    [InlineData(null, 0)]
+    [InlineData(new int[]{}, 0)]
+    [InlineData(new int[]{1, 2, 5}, 1)]
+    [InlineData(new int[]{3, -2, 5}, -2)]
+    [InlineData(new int[]{3, -2, 2, 4}, 2)]
+    [InlineData(new int[]{3, -2, -100, 2, 4}, 2)]
+    public void ComputeClosestToZeroTest(int[] ts, int expected) =>
+        ComputeClosestToZero(ts).Should().Be(expected);
+
+    private int ComputeClosestToZero(int[]? ts)
+    {
+        if (ts is null || ts.Length == 0)
+            return 0;
+
+        return ts
+            .OrderBy(Math.Abs)
+            .ThenByDescending(x => x) // 2 -2 3 4 -10
+            .FirstOrDefault();
+    }
 }