# Copyright 2020 The TensorFlow 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.
# ==============================================================================
"""Tests for script operations."""

from tensorflow.python.eager import def_function
from tensorflow.python.framework import dtypes
from tensorflow.python.framework import test_util
from tensorflow.python.framework import constant_op
from tensorflow.python.ops import script_ops
from tensorflow.python.ops.script_ops import numpy_function
from tensorflow.python.platform import test


class NumpyFunctionTest(test.TestCase):

  @test_util.run_in_graph_and_eager_modes
  def test_numpy_arguments(self):

    def plus(a, b):
      return a + b

    actual_result = script_ops.numpy_function(plus, [1, 2], dtypes.int32)
    expect_result = constant_op.constant(3, dtypes.int32)
    self.assertAllEqual(actual_result, expect_result)

  def test_stateless_flag(self):
    call_count = 0

    def plus(a, b):
      global call_count
      call_count += 1
      return a + b

    @def_function.function
    def tensor_plus_stateful(a, b):
      return numpy_function(plus, [a, b], dtypes.int32, stateful=True)

    @def_function.function
    def tensor_plus_stateless(a, b):
      return numpy_function(plus, [a, b], dtypes.int32, stateful=False)

    @def_function.function(autograph=False)
    def tensor_double_plus_stateless(a, b):
      sum1 = tensor_plus_stateless(a, b)
      sum2 = tensor_plus_stateless(a, b)
      return sum1 + sum2

    # different argument
    tensor_double_plus_stateless(
      constant_op.constant(1),
      constant_op.constant(2),
    )
    self.assertEqual(call_count, 1)  # +1 as only the first encounter was executed

    @def_function.function(autograph=False)
    def tensor_double_plus_stateful(a, b):
      sum1 = tensor_plus_stateful(a, b)
      sum2 = tensor_plus_stateful(a, b)
      return sum1 + sum2

    tensor_double_plus_stateful(
      constant_op.constant(3),
      constant_op.constant(4),
                          )
    self.assertEqual(call_count, 3)  # +2 as it is stateful, func was both times executed


if __name__ == "__main__":
  test.main()

@@ -1495,12 +1495,14 @@
     
-glob
+nonloc
 al c
@@ -1571,32 +1571,49 @@
 unction.function
+(autograph=False)
 %0A    def tensor_
@@ -1604,32 +1604,39 @@
 %0A    def tensor_
+double_
 plus_stateful(a,
@@ -1621,35 +1621,36 @@
 ouble_plus_state
-ful
+less
 (a, b):%0A      re
@@ -1639,38 +1639,38 @@
 ss(a, b):%0A      
-return
+sum1 =
  numpy_function(
@@ -1710,91 +1710,27 @@
 ful=
-True)%0A%0A    @def_function.function%0A    def tensor_plus_stateless(a, b):
+False)
 %0A      
-return
+sum2 =
  num
@@ -1788,179 +1788,8 @@
 lse)
-%0A%0A    @def_function.function(autograph=False)%0A    def tensor_double_plus_stateless(a, b):%0A      sum1 = tensor_plus_stateless(a, b)%0A      sum2 = tensor_plus_stateless(a, b)
 %0A   
@@ -2122,36 +2122,67 @@
  sum1 = 
-tensor_plus_
+numpy_function(plus, %5Ba, b%5D, dtypes.int32, 
 stateful
 (a, b)%0A 
@@ -2165,37 +2165,37 @@
 .int32, stateful
-(a, b
+=True
 )%0A      sum2 = t
@@ -2197,28 +2197,59 @@
 2 = 
-tensor_plus_
+numpy_function(plus, %5Ba, b%5D, dtypes.int32, 
 stateful
 (a, 
@@ -2244,21 +2244,21 @@
 stateful
-(a, b
+=True
 )%0A      

remove unnecessary wrapping of stateful, stateless function