fix Embedding layer.

Author: Oceania2018

src/TensorFlowNET.Keras/Engine/Model.Predict.cs

@@ -60,7 +60,6 @@ public Tensors predict(Tensor x,
                     // callbacks.on_predict_batch_end(end_step, {'outputs': batch_outputs})
                 }
                 GC.Collect();
-                GC.WaitForPendingFinalizers();
             }
             // callbacks.on_predict_end()
             return outputs;

src/TensorFlowNET.Keras/Layers/Core/Embedding.cs

@@ -38,7 +38,9 @@ public Embedding(EmbeddingArgs args)
             : base(new LayerArgs // copy args
             {
                 DType = args.DType,
-                Name = args.Name
+                Name = args.Name,
+                InputShape = args.InputShape,
+                BatchSize = args.BatchSize
             })
         {
             this.args = args;

test/TensorFlowNET.Keras.UnitTest/Layers/LayersTest.cs

@@ -82,37 +82,13 @@ public void TensorFlowOpLayer()
         /// https://www.tensorflow.org/api_docs/python/tf/keras/layers/Embedding
         /// </summary>
         [TestMethod]
-        public void Embedding_Simple()
-        {
-            var emb = keras.layers.Embedding(256, 12, input_length: 4);
-            var input_array = np.arange(12).reshape((3, 4)).astype(np.float32);
-            var output = emb.Apply(input_array);
-            Assert.AreEqual((3, 4, 12), output.shape);
-        }
-
-        /// <summary>
-        /// https://www.tensorflow.org/api_docs/python/tf/keras/layers/Embedding
-        /// </summary>
-        [TestMethod]
-        [Ignore]
         public void Embedding()
         {
             var model = keras.Sequential();
-            var layer = keras.layers.Embedding(7, 2, input_length: 4);
+            var layer = keras.layers.Embedding(1000, 64, input_length: 10);
             model.add(layer);
-            // the model will take as input an integer matrix of size (batch,
-            // input_length).
-            // the largest integer (i.e. word index) in the input should be no larger
-            // than 999 (vocabulary size).
-            // now model.output_shape == (None, 10, 64), where None is the batch
-            // dimension.
-            var input_array = np.array(new int[,]
-            {
-                { 1, 2, 3, 4 },
-                { 2, 3, 4, 5 },
-                { 3, 4, 5, 6 }
-            });
-            // model.compile("rmsprop", "mse");
+            var input_array = np.random.randint(1000, size: (32, 10));
+            model.compile("rmsprop", "mse", new[] { "accuracy" });
             var output_array = model.predict(input_array);
             Assert.AreEqual((32, 10, 64), output_array.shape);
         }