add ReduceSum test.

test/TensorFlowNET.UnitTest/TF_API/GradientTest.cs

@@ -5,7 +5,7 @@ using System.Linq;
 using Tensorflow;
 using static Tensorflow.Binding;
 
-namespace Tensorflow.UnitTest.TF_API
+namespace TensorFlowNET.UnitTest.TF_API
 {
     [TestClass]
     public class GradientTest

test/TensorFlowNET.UnitTest/TF_API/LinalgTest.cs

@@ -4,7 +4,7 @@ using System.Collections.Generic;
 using System.Text;
 using static Tensorflow.Binding;
 
-namespace Tensorflow.UnitTest.TF_API
+namespace TensorFlowNET.UnitTest.TF_API
 {
     [TestClass]
     public class LinalgTest

test/TensorFlowNET.UnitTest/TF_API/MathApiTest.cs

@@ -13,6 +13,7 @@ namespace TensorFlowNET.UnitTest.TF_API
     {
         // A constant vector of size 6
         Tensor a = tf.constant(new float[] { 1.0f, -0.5f, 3.4f, -2.1f, 0.0f, -6.5f });
+        Tensor b = tf.constant(new float[,] { { 1.0f, -0.5f, 3.4f }, { -2.1f, 0.0f, -6.5f } });
 
         [TestMethod]
         public void Sin()
@@ -31,5 +32,24 @@ namespace TensorFlowNET.UnitTest.TF_API
             var actual = b.ToArray<float>();
             Assert.IsTrue(Equal(expected, actual));
         }
+
+        [TestMethod]
+        public void ReduceSum()
+        {
+            var x1 = tf.reduce_sum(b);
+            Assert.AreEqual(-4.7f, (float)x1);
+
+            var x2 = tf.reduce_sum(b, 0);
+            Assert.IsTrue(Enumerable.SequenceEqual(new[] { -1.0999999f, -0.5f, -3.1f }, x2.ToArray<float>()));
+
+            var x3 = tf.reduce_sum(b, 1);
+            Assert.IsTrue(Enumerable.SequenceEqual(new[] { 3.9f, -8.6f }, x3.ToArray<float>()));
+
+            var x4 = tf.reduce_sum(b, 1, keepdims: true);
+            Assert.AreEqual((2, 1), x4.TensorShape);
+
+            var x5 = tf.reduce_sum(b, (0, 1));
+            Assert.AreEqual(-4.7f, (float)x5);
+        }
     }
 }

test/TensorFlowNET.UnitTest/TF_API/StringsApiTest.cs

@@ -2,9 +2,10 @@
 using System;
 using System.Collections.Generic;
 using System.Text;
+using Tensorflow;
 using static Tensorflow.Binding;
 
-namespace Tensorflow.UnitTest.TF_API
+namespace TensorFlowNET.UnitTest.TF_API
 {
     [TestClass]
     public class StringsApiTest

test/TensorFlowNET.UnitTest/TF_API/TensorOperate.cs

@@ -5,7 +5,7 @@ using System.Linq;
 using Tensorflow;
 using static Tensorflow.Binding;
 
-namespace Tensorflow.UnitTest.TF_API
+namespace TensorFlowNET.UnitTest.TF_API
 {
     [TestClass]
     public class TensorOperate

test/TensorFlowNET.UnitTest/Utilities/TestHelper.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Text;
 
-namespace Tensorflow.UnitTest
+namespace TensorFlowNET.UnitTest
 {
     public class TestHelper
     {