From bad9aba49ee7a0c39cfc76723cd6473a318895ca Mon Sep 17 00:00:00 2001
From: Antonio Cifonelli <antonio.cifonelli@gmail.com>
Date: Mon, 5 Aug 2019 23:07:26 +0200
Subject: [PATCH] Adding `logical_not` operator (#343)

Relative unit test in `OperationTest`.
---
 src/TensorFlowNET.Core/APIs/tf.math.cs            |  3 +++
 src/TensorFlowNET.Core/Operations/gen_math_ops.cs |  7 +++++++
 test/TensorFlowNET.UnitTest/OperationsTest.cs     | 11 ++++++++++-
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/TensorFlowNET.Core/APIs/tf.math.cs b/src/TensorFlowNET.Core/APIs/tf.math.cs
index fb65d31b..b787bf1d 100644
--- a/src/TensorFlowNET.Core/APIs/tf.math.cs
+++ b/src/TensorFlowNET.Core/APIs/tf.math.cs
@@ -192,6 +192,9 @@ namespace Tensorflow
         public static Tensor logical_and(Tensor x, Tensor y, string name = null)
             => gen_math_ops.logical_and(x, y, name);
 
+        public static Tensor logical_not(Tensor x, string name = null)
+            => gen_math_ops.logical_not(x, name);
+
         /// <summary>
         /// Clips tensor values to a specified min and max.
         /// </summary>
diff --git a/src/TensorFlowNET.Core/Operations/gen_math_ops.cs b/src/TensorFlowNET.Core/Operations/gen_math_ops.cs
index a8b9ac49..c3b30d8f 100644
--- a/src/TensorFlowNET.Core/Operations/gen_math_ops.cs
+++ b/src/TensorFlowNET.Core/Operations/gen_math_ops.cs
@@ -357,6 +357,13 @@ namespace Tensorflow
             return _op.outputs[0];
         }
 
+        public static Tensor logical_not(Tensor x, string name = null)
+        {
+            var _op = _op_def_lib._apply_op_helper("LogicalNot", name, args: new { x });
+
+            return _op.outputs[0];
+        }
+
         public static Tensor squared_difference(Tensor x, Tensor y, string name = null)
         {
             var _op = _op_def_lib._apply_op_helper("SquaredDifference", name, args: new { x, y, name });
diff --git a/test/TensorFlowNET.UnitTest/OperationsTest.cs b/test/TensorFlowNET.UnitTest/OperationsTest.cs
index 10046f0c..68c44831 100644
--- a/test/TensorFlowNET.UnitTest/OperationsTest.cs
+++ b/test/TensorFlowNET.UnitTest/OperationsTest.cs
@@ -131,7 +131,7 @@ namespace TensorFlowNET.UnitTest
         }
 
         [TestMethod]
-        public void logicalAndTest()
+        public void logicalOpsTest()
         {
             var a = tf.constant(new[] {1f, 2f, 3f, 4f, -4f, -3f, -2f, -1f});
             var b = tf.less(a, 0f);
@@ -144,6 +144,15 @@ namespace TensorFlowNET.UnitTest
                 var o = sess.run(d);
                 Assert.IsTrue(o.array_equal(check));
             }
+
+            d = tf.cast(tf.logical_not(b), tf.int32);
+            check = np.array(new[] { 1, 1, 1, 1, 0, 0, 0, 0 });
+
+            using (var sess = tf.Session())
+            {
+                var o = sess.run(d);
+                Assert.IsTrue(o.array_equal(check));
+            }
         }
 
         [TestMethod]