fix set_shape.

src/TensorFlowNET.Core/Tensors/Tensor.cs

@@ -155,8 +155,7 @@ namespace Tensorflow
         /// </summary>
         public virtual void set_shape(TensorShape shape)
         {
-            // this.shape = shape.rank >= 0 ? shape.dims : null;
-            throw new NotImplementedException("");
+            this.shape = shape.rank >= 0 ? shape : null;
         }
 
         /// <summary>

test/TensorFlowNET.Graph.UnitTest/GradientTest/GradientTest.cs

@@ -14,8 +14,6 @@ namespace TensorFlowNET.UnitTest.Gradient
         [TestMethod]
         public void BroadcastToGrad()
         {
-            var graph = tf.Graph().as_default();
-
             var x = tf.constant(2, dtype: dtypes.float32);
             var y = tf.broadcast_to(x, (2, 4, 3));
             var grad = tf.gradients(y, x);
@@ -30,8 +28,6 @@ namespace TensorFlowNET.UnitTest.Gradient
         [TestMethod]
         public void CumsumGrad()
         {
-            var graph = tf.Graph().as_default();
-
             var x = tf.constant(2, dtype: dtypes.float32);
             var y = tf.broadcast_to(x, (2, 4, 3));
             var z = tf.cumsum(y, axis: 1);
@@ -47,7 +43,6 @@ namespace TensorFlowNET.UnitTest.Gradient
         [TestMethod, Ignore]
         public void testGradients()
         {
-            var g = tf.Graph().as_default();
             var inp = tf.constant(1.0, shape: new[] { 32, 100 }, name: "in");
             var w = tf.constant(1.0, shape: new[] { 100, 10 }, name: "w");
             var b = tf.Variable(1.0, shape: new[] { 10 }, name: "b");

test/TensorFlowNET.Graph.UnitTest/GraphModeTestBase.cs

@@ -1,14 +1,23 @@
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Tensorflow;
 using static Tensorflow.Binding;
 
 namespace TensorFlowNET.UnitTest
 {
     public class GraphModeTestBase : PythonTest
     {
+        protected Graph graph;
         [TestInitialize]
         public void TestInit()
         {
             tf.compat.v1.disable_eager_execution();
+            graph = tf.Graph().as_default();
+        }
+
+        [TestCleanup]
+        public void TestClean()
+        {
+            graph.Exit();
         }
     }
 }

test/TensorFlowNET.Graph.UnitTest/NameScopeTest.cs

@@ -38,7 +38,7 @@ namespace TensorFlowNET.UnitTest.Basics
                 Assert.AreEqual("scope1/Const_1:0", const3.name);
             });
 
-            g.Dispose();
+            g.Exit();
 
             Assert.AreEqual("", g._name_stack);
         }
@@ -70,7 +70,7 @@ namespace TensorFlowNET.UnitTest.Basics
                 Assert.AreEqual("scope1/Const_1:0", const3.name);
             };
 
-            g.Dispose();
+            g.Exit();
 
             Assert.AreEqual("", g._name_stack);
         }