# Copyright 2019 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.
# ==============================================================================
"""Test configs for resolve_constant_strided_slice."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import numpy as np
import tensorflow.compat.v1 as tf
from tensorflow.lite.testing.zip_test_utils import make_zip_of_tests
from tensorflow.lite.testing.zip_test_utils import register_make_test_function


# TODO(chaomei): refactor the test to cover more cases, like negative stride,
# negative array index etc.
@register_make_test_function()
def make_resolve_constant_strided_slice_tests(options):
  """Make a set of tests to show strided_slice yields incorrect results."""

  test_parameters = [{
      "unused_iteration_counter": [1],
  }]

  def build_graph(parameters):
    """Build the strided_slice op testing graph."""
    del parameters
    input_values = tf.compat.v1.placeholder(dtype=tf.float32, shape=[4, 2])
    data = tf.constant(
        [[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11], [12, 13, 14, 15]],
        tf.float32)
    return [input_values], [input_values + data[:, :2]]

  def build_inputs(parameters, sess, inputs, outputs):
    del parameters
    input_values = np.zeros([4, 2], dtype=np.float32)
    return [input_values], sess.run(
        outputs, feed_dict={inputs[0]: input_values})

  make_zip_of_tests(options, test_parameters, build_graph, build_inputs)
