Add test for sine softmax.

Author: sseto001

test/ParallelReverseAutoDiff.Test/SineSoftmaxTest.cs

@@ -0,0 +1,26 @@
+using ParallelReverseAutoDiff.RMAD;
+using Xunit;
+
+namespace ParallelReverseAutoDiff.Test
+{
+    public class SineSoftmaxTest
+    {
+        [Fact]
+        public void GivenASineSoftmaxOperation_TheRowsAddUpToMoreThanPointEightOnAverage()
+        {
+            SineSoftmaxOperation op = new SineSoftmaxOperation();
+            List<double> averages = new List<double>();
+            for (int i = 5; i < 1000; ++i)
+            {
+                Matrix input = new Matrix(i, i);
+                input.Initialize(InitializationType.Xavier);
+                var output = op.Forward(input);
+                Assert.NotNull(output);
+                var sums = output.ToArray().ToList().Select(x => x.Sum()).ToList();
+                var average = output.ToArray().ToList().Select(x => x.Sum()).Average();
+                Assert.True(average > 0.8d);
+                averages.Add(average);
+            }
+        }
+    }
+}