tests are passing

src/TensorFlowNET.Core/Variables/variables.py.cs

@@ -154,13 +154,5 @@ namespace Tensorflow
 
             return op;
         }
-
-        public static Tensor global_variables_initializer()
-        {
-            // if context.executing_eagerly():
-            //      return control_flow_ops.no_op(name = "global_variables_initializer")
-            var group =  variables_initializer(global_variables().ToArray());
-            return group;
-        }
     }
 }

test/TensorFlowNET.UnitTest/PythonTest.cs

@@ -6,6 +6,7 @@ using System.Collections;
 using System.Linq;
 using Tensorflow;
 using static Tensorflow.Binding;
+using System.Collections.Generic;
 
 namespace TensorFlowNET.UnitTest
 {
@@ -144,11 +145,12 @@ namespace TensorFlowNET.UnitTest
             Assert.IsTrue(np.allclose(array1, array2, rtol: eps));
         }
 
-        private class CollectionComparer : System.Collections.IComparer
+        private class CollectionComparer : IComparer
         {
             private readonly double _epsilon;
 
-            public CollectionComparer(double eps = 1e-06) {
+            public CollectionComparer(double eps = 1e-06)
+            {
                 _epsilon = eps;
             }
             public int Compare(object x, object y)
@@ -166,13 +168,15 @@ namespace TensorFlowNET.UnitTest
         }
 
         public void assertAllCloseAccordingToType<T>(
-            T[] expected,
-            T[] given,
+            ICollection expected,
+            ICollection<T> given,
             double eps = 1e-6,
             float float_eps = 1e-6f)
         {
             // TODO: check if any of arguments is not double and change toletance
-            CollectionAssert.AreEqual(expected, given, new CollectionComparer(eps));
+            // remove givenAsDouble and cast expected instead
+            var givenAsDouble = given.Select(x => Convert.ToDouble(x)).ToArray();
+            CollectionAssert.AreEqual(expected, givenAsDouble, new CollectionComparer(eps));
         }
 
         public void assertProtoEquals(object toProto, object o)
@@ -241,17 +245,25 @@ namespace TensorFlowNET.UnitTest
             //    return self._eval_helper(tensors)
             //  else:
             {
-                var sess = tf.Session();
+                var sess = tf.get_default_session();
                 var ndarray = tensor.eval(sess);
-                if (typeof(T) == typeof(double))
+                if (typeof(T) == typeof(double)
+                    || typeof(T) == typeof(float)
+                    || typeof(T) == typeof(int))
+                {
+                    result = Convert.ChangeType(ndarray, typeof(T));
+                }
+                else if (typeof(T) == typeof(double[]))
+                {
+                    result = ndarray.ToMultiDimArray<double>();
+                }
+                else if (typeof(T) == typeof(float[]))
                 {
-                    double x = ndarray;
-                    result = x;
+                    result = ndarray.ToMultiDimArray<float>();
                 }
-                else if (typeof(T) == typeof(int))
+                else if (typeof(T) == typeof(int[]))
                 {
-                    int x = ndarray;
-                    result = x;
+                    result = ndarray.ToMultiDimArray<int>();
                 }
                 else
                 {
@@ -457,12 +469,12 @@ namespace TensorFlowNET.UnitTest
             else
             {
 
-                if (crash_if_inconsistent_args && !self._cached_graph.Equals(graph))
+                if (crash_if_inconsistent_args && self._cached_graph != null && !self._cached_graph.Equals(graph))
                     throw new ValueError(@"The graph used to get the cached session is 
                                            different than the one that was used to create the
                                            session. Maybe create a new session with 
                                            self.session()");
-                if (crash_if_inconsistent_args && !self._cached_config.Equals(config))
+                if (crash_if_inconsistent_args && self._cached_config != null && !self._cached_config.Equals(config))
                 {
                     throw new ValueError(@"The config used to get the cached session is 
                                            different than the one that was used to create the 

test/TensorFlowNET.UnitTest/Training/GradientDescentOptimizerTests.cs

@@ -1,8 +1,6 @@
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using System;
 using System.Linq;
-using System.Runtime.Intrinsics.X86;
-using System.Security.AccessControl;
 using Tensorflow.NumPy;
 using TensorFlowNET.UnitTest;
 using static Tensorflow.Binding;
@@ -12,18 +10,23 @@ namespace Tensorflow.Keras.UnitTest.Optimizers
     [TestClass]
     public class GradientDescentOptimizerTest : PythonTest
     {
-        private void TestBasicGeneric<T>() where T : struct
+        private static TF_DataType GetTypeForNumericType<T>() where T : struct
         {
-            var dtype = Type.GetTypeCode(typeof(T)) switch
+            return Type.GetTypeCode(typeof(T)) switch
             {
                 TypeCode.Single => np.float32,
                 TypeCode.Double => np.float64,
                 _ => throw new NotImplementedException(),
             };
+        }
+
+        private void TestBasicGeneric<T>() where T : struct
+        {
+            var dtype = GetTypeForNumericType<T>();
 
             // train.GradientDescentOptimizer is V1 only API.
             tf.Graph().as_default();
-            using (self.cached_session())
+            using (var sess = self.cached_session())
             {
                 var var0 = tf.Variable(new[] { 1.0, 2.0 }, dtype: dtype);
                 var var1 = tf.Variable(new[] { 3.0, 4.0 }, dtype: dtype);
@@ -36,21 +39,25 @@ namespace Tensorflow.Keras.UnitTest.Optimizers
                 };
                 var sgd_op = optimizer.apply_gradients(grads_and_vars);
 
-                var global_variables = variables.global_variables_initializer();
-                self.evaluate<T>(global_variables);
+                var global_variables = tf.global_variables_initializer();
+                sess.run(global_variables);
+
                 // Fetch params to validate initial values
+                var initialVar0 = sess.run(var0);
+                var valu = var0.eval(sess);
+                var initialVar1 = sess.run(var1);
                 // TODO: use self.evaluate<T[]> instead of self.evaluate<double[]>
-                self.assertAllCloseAccordingToType(new double[] { 1.0, 2.0 }, self.evaluate<double[]>(var0));
-                self.assertAllCloseAccordingToType(new double[] { 3.0, 4.0 }, self.evaluate<double[]>(var1));
+                self.assertAllCloseAccordingToType(new[] { 1.0, 2.0 }, self.evaluate<T[]>(var0));
+                self.assertAllCloseAccordingToType(new[] { 3.0, 4.0 }, self.evaluate<T[]>(var1));
                 // Run 1 step of sgd
                 sgd_op.run();
                 // Validate updated params
                 self.assertAllCloseAccordingToType(
-                    new double[] { 1.0 - 3.0 * 0.1, 2.0 - 3.0 * 0.1 },
-                    self.evaluate<double[]>(var0));
+                    new[] { 1.0 - 3.0 * 0.1, 2.0 - 3.0 * 0.1 },
+                    self.evaluate<T[]>(var0));
                 self.assertAllCloseAccordingToType(
-                    new double[] { 3.0 - 3.0 * 0.01, 4.0 - 3.0 * 0.01 },
-                    self.evaluate<double[]>(var1));
+                    new[] { 3.0 - 3.0 * 0.01, 4.0 - 3.0 * 0.01 },
+                    self.evaluate<T[]>(var1));
                 // TODO: self.assertEqual(0, len(optimizer.variables()));
             }
         }