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# Copyright 2018 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 manip_ops."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import numpy as np
from tensorflow.python.framework import constant_op
from tensorflow.python.framework import errors_impl
from tensorflow.python.framework import test_util
from tensorflow.python.ops import gradient_checker
from tensorflow.python.ops import manip_ops
from tensorflow.python.platform import test as test_lib
# pylint: disable=g-import-not-at-top
try:
from distutils.version import StrictVersion as Version
# numpy.roll for multiple shifts was introduced in numpy version 1.12.0
NP_ROLL_CAN_MULTISHIFT = Version(np.version.version) >= Version("1.12.0")
except ImportError:
NP_ROLL_CAN_MULTISHIFT = False
# pylint: enable=g-import-not-at-top
class RollTest(test_util.TensorFlowTestCase):
def _testRoll(self, np_input, shift, axis):
expected_roll = np.roll(np_input, shift, axis)
with self.test_session():
roll = manip_ops.roll(np_input, shift, axis)
self.assertAllEqual(roll.eval(), expected_roll)
def _testGradient(self, np_input, shift, axis):
with self.test_session():
inx = constant_op.constant(np_input.tolist())
xs = list(np_input.shape)
y = manip_ops.roll(inx, shift, axis)
# Expected y's shape to be the same
ys = xs
jacob_t, jacob_n = gradient_checker.compute_gradient(
inx, xs, y, ys, x_init_value=np_input)
self.assertAllClose(jacob_t, jacob_n, rtol=1e-5, atol=1e-5)
def _testAll(self, np_input, shift, axis):
self._testRoll(np_input, shift, axis)
if np_input.dtype == np.float32:
self._testGradient(np_input, shift, axis)
def testIntTypes(self):
for t in [np.int32, np.int64]:
self._testAll(np.random.randint(-100, 100, (5)).astype(t), 3, 0)
if NP_ROLL_CAN_MULTISHIFT:
self._testAll(
np.random.randint(-100, 100, (4, 4, 3)).astype(t), [1, -2, 3],
[0, 1, 2])
self._testAll(
np.random.randint(-100, 100, (4, 2, 1, 3)).astype(t), [0, 1, -2],
[1, 2, 3])
def testFloatTypes(self):
for t in [np.float32, np.float64]:
self._testAll(np.random.rand(5).astype(t), 2, 0)
if NP_ROLL_CAN_MULTISHIFT:
self._testAll(np.random.rand(3, 4).astype(t), [1, 2], [1, 0])
self._testAll(np.random.rand(1, 3, 4).astype(t), [1, 0, -3], [0, 1, 2])
def testComplexTypes(self):
for t in [np.complex64, np.complex128]:
x = np.random.rand(4, 4).astype(t)
self._testAll(x + 1j * x, 2, 0)
if NP_ROLL_CAN_MULTISHIFT:
x = np.random.rand(2, 5).astype(t)
self._testAll(x + 1j * x, [1, 2], [1, 0])
x = np.random.rand(3, 2, 1, 1).astype(t)
self._testAll(x + 1j * x, [2, 1, 1, 0], [0, 3, 1, 2])
def testRollInputMustVectorHigherRaises(self):
tensor = 7
shift = 1
axis = 0
with self.test_session():
with self.assertRaisesRegexp(errors_impl.InvalidArgumentError,
"input must be 1-D or higher"):
manip_ops.roll(tensor, shift, axis).eval()
def testRollAxisMustBeScalarOrVectorRaises(self):
tensor = [[1, 2], [3, 4]]
shift = 1
axis = [[0, 1]]
with self.test_session():
with self.assertRaisesRegexp(errors_impl.InvalidArgumentError,
"axis must be a scalar or a 1-D vector"):
manip_ops.roll(tensor, shift, axis).eval()
def testRollShiftMustBeScalarOrVectorRaises(self):
tensor = [[1, 2], [3, 4]]
shift = [[0, 1]]
axis = 1
with self.test_session():
with self.assertRaisesRegexp(errors_impl.InvalidArgumentError,
"shift must be a scalar or a 1-D vector"):
manip_ops.roll(tensor, shift, axis).eval()
def testRollShiftAndAxisMustBeSameSizeRaises(self):
tensor = [[1, 2], [3, 4]]
shift = [1]
axis = [0, 1]
with self.test_session():
with self.assertRaisesRegexp(errors_impl.InvalidArgumentError,
"shift and axis must have the same size"):
manip_ops.roll(tensor, shift, axis).eval()
def testRollAxisOutOfRangeRaises(self):
tensor = [1, 2]
shift = 1
axis = 1
with self.test_session():
with self.assertRaisesRegexp(errors_impl.InvalidArgumentError,
"is out of range"):
manip_ops.roll(tensor, shift, axis).eval()
if __name__ == "__main__":
test_lib.main()
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