add tf.bitwise.left_shift unit test #614.

Author: Oceania2018

src/TensorFlowNET.Core/APIs/tf.bitwise.cs

@@ -0,0 +1,25 @@
+/*****************************************************************************
+   Copyright 2020 The TensorFlow.NET Authors. All Rights Reserved.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+******************************************************************************/
+
+using Tensorflow.Operations;
+
+namespace Tensorflow
+{
+    public partial class tensorflow
+    {
+        public bitwise_ops bitwise = new bitwise_ops();
+    }
+}

src/TensorFlowNET.Core/Operations/bitwise_ops.cs

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+/*****************************************************************************
+   Copyright 2020 Haiping Chen. All Rights Reserved.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+******************************************************************************/
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using static Tensorflow.Binding;
+
+namespace Tensorflow.Operations
+{
+    public class bitwise_ops
+    {
+        /// <summary>
+        /// Elementwise computes the bitwise left-shift of `x` and `y`.
+        /// https://www.tensorflow.org/api_docs/python/tf/bitwise/left_shift
+        /// </summary>
+        /// <param name="x"></param>
+        /// <param name="y"></param>
+        /// <param name="name"></param>
+        /// <returns></returns>
+        public Tensor left_shift(Tensor x, Tensor y, string name = null)
+        {
+            if (tf.Context.executing_eagerly())
+            {
+                var results = tf.Runner.TFE_FastPathExecute(tf.Context, tf.Context.DeviceName,
+                    "LeftShift", name,
+                    null,
+                    x, y);
+
+                return results[0];
+            }
+
+            var _op = tf.OpDefLib._apply_op_helper("LeftShift", name, args: new { x, y });
+            return _op.output;
+        }
+    }
+}

test/TensorFlowNET.UnitTest/TF_API/BitwiseApiTest.cs

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+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Tensorflow;
+using static Tensorflow.Binding;
+
+namespace TensorFlowNET.UnitTest.TF_API
+{
+    [TestClass]
+    public class BitwiseApiTest : TFNetApiTest
+    {
+        Tensor lhs = tf.constant(new int[] { -1, -5, -3, -14 });
+        Tensor rhs = tf.constant(new int[] { 5, 0, 7, 11 });
+
+        [TestMethod]
+        public void LeftShift()
+        {
+            var left_shift_result = tf.bitwise.left_shift(lhs, rhs);
+            var expected = new int[] { -32, -5, -384, -28672 };
+            var actual = left_shift_result.ToArray<int>();
+            Assert.IsTrue(Enumerable.SequenceEqual(expected, actual));
+        }
+    }
+}