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# Copyright 2017 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 the experimental input pipeline ops."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from os import path
import shutil
import tempfile
from tensorflow.python.data.ops import dataset_ops
from tensorflow.python.framework import dtypes
from tensorflow.python.framework import errors
from tensorflow.python.ops import array_ops
from tensorflow.python.platform import test
from tensorflow.python.util import compat
class ListFilesDatasetOpTest(test.TestCase):
def setUp(self):
self.tmp_dir = tempfile.mkdtemp()
def tearDown(self):
shutil.rmtree(self.tmp_dir, ignore_errors=True)
def _touchTempFiles(self, filenames):
for filename in filenames:
open(path.join(self.tmp_dir, filename), 'a').close()
def testEmptyDirectory(self):
dataset = dataset_ops.Dataset.list_files(path.join(self.tmp_dir, '*'))
with self.test_session() as sess:
itr = dataset.make_one_shot_iterator()
next_element = itr.get_next()
with self.assertRaises(errors.OutOfRangeError):
sess.run(next_element)
def testSimpleDirectory(self):
filenames = ['a', 'b', 'c']
self._touchTempFiles(filenames)
dataset = dataset_ops.Dataset.list_files(path.join(self.tmp_dir, '*'))
with self.test_session() as sess:
itr = dataset.make_one_shot_iterator()
next_element = itr.get_next()
full_filenames = []
produced_filenames = []
for filename in filenames:
full_filenames.append(
compat.as_bytes(path.join(self.tmp_dir, filename)))
produced_filenames.append(compat.as_bytes(sess.run(next_element)))
self.assertItemsEqual(full_filenames, produced_filenames)
with self.assertRaises(errors.OutOfRangeError):
sess.run(itr.get_next())
def testSimpleDirectoryNotShuffled(self):
filenames = ['b', 'c', 'a']
self._touchTempFiles(filenames)
dataset = dataset_ops.Dataset.list_files(
path.join(self.tmp_dir, '*'), shuffle=False)
with self.test_session() as sess:
itr = dataset.make_one_shot_iterator()
next_element = itr.get_next()
for filename in sorted(filenames):
self.assertEqual(compat.as_bytes(path.join(self.tmp_dir, filename)),
sess.run(next_element))
with self.assertRaises(errors.OutOfRangeError):
sess.run(itr.get_next())
def testFixedSeedResultsInRepeatableOrder(self):
filenames = ['a', 'b', 'c']
self._touchTempFiles(filenames)
dataset = dataset_ops.Dataset.list_files(
path.join(self.tmp_dir, '*'), shuffle=True, seed=37)
with self.test_session() as sess:
itr = dataset.make_initializable_iterator()
next_element = itr.get_next()
full_filenames = [compat.as_bytes(path.join(self.tmp_dir, filename))
for filename in filenames]
all_produced_filenames = []
for _ in range(3):
produced_filenames = []
sess.run(itr.initializer)
try:
while True:
produced_filenames.append(sess.run(next_element))
except errors.OutOfRangeError:
pass
all_produced_filenames.append(produced_filenames)
# Each run should produce the same set of filenames, which may be
# different from the order of `full_filenames`.
self.assertItemsEqual(full_filenames, all_produced_filenames[0])
# However, the different runs should produce filenames in the same order
# as each other.
self.assertEqual(all_produced_filenames[0], all_produced_filenames[1])
self.assertEqual(all_produced_filenames[0], all_produced_filenames[2])
def testEmptyDirectoryInitializer(self):
filename_placeholder = array_ops.placeholder(dtypes.string, shape=[])
dataset = dataset_ops.Dataset.list_files(filename_placeholder)
with self.test_session() as sess:
itr = dataset.make_initializable_iterator()
with self.assertRaisesRegexp(
errors.InvalidArgumentError, 'No files matched pattern: '):
sess.run(
itr.initializer,
feed_dict={filename_placeholder: path.join(self.tmp_dir, '*')})
def testSimpleDirectoryInitializer(self):
filenames = ['a', 'b', 'c']
self._touchTempFiles(filenames)
filename_placeholder = array_ops.placeholder(dtypes.string, shape=[])
dataset = dataset_ops.Dataset.list_files(filename_placeholder)
with self.test_session() as sess:
itr = dataset.make_initializable_iterator()
next_element = itr.get_next()
sess.run(
itr.initializer,
feed_dict={filename_placeholder: path.join(self.tmp_dir, '*')})
full_filenames = []
produced_filenames = []
for filename in filenames:
full_filenames.append(
compat.as_bytes(path.join(self.tmp_dir, filename)))
produced_filenames.append(compat.as_bytes(sess.run(next_element)))
self.assertItemsEqual(full_filenames, produced_filenames)
with self.assertRaises(errors.OutOfRangeError):
sess.run(itr.get_next())
def testFileSuffixes(self):
filenames = ['a.txt', 'b.py', 'c.py', 'd.pyc']
self._touchTempFiles(filenames)
filename_placeholder = array_ops.placeholder(dtypes.string, shape=[])
dataset = dataset_ops.Dataset.list_files(filename_placeholder)
with self.test_session() as sess:
itr = dataset.make_initializable_iterator()
next_element = itr.get_next()
sess.run(
itr.initializer,
feed_dict={filename_placeholder: path.join(self.tmp_dir, '*.py')})
full_filenames = []
produced_filenames = []
for filename in filenames[1:-1]:
full_filenames.append(
compat.as_bytes(path.join(self.tmp_dir, filename)))
produced_filenames.append(compat.as_bytes(sess.run(next_element)))
self.assertItemsEqual(full_filenames, produced_filenames)
with self.assertRaises(errors.OutOfRangeError):
sess.run(itr.get_next())
def testFileMiddles(self):
filenames = ['a.txt', 'b.py', 'c.pyc']
self._touchTempFiles(filenames)
filename_placeholder = array_ops.placeholder(dtypes.string, shape=[])
dataset = dataset_ops.Dataset.list_files(filename_placeholder)
with self.test_session() as sess:
itr = dataset.make_initializable_iterator()
next_element = itr.get_next()
sess.run(
itr.initializer,
feed_dict={filename_placeholder: path.join(self.tmp_dir, '*.py*')})
full_filenames = []
produced_filenames = []
for filename in filenames[1:]:
full_filenames.append(
compat.as_bytes(path.join(self.tmp_dir, filename)))
produced_filenames.append(compat.as_bytes(sess.run(next_element)))
self.assertItemsEqual(full_filenames, produced_filenames)
with self.assertRaises(errors.OutOfRangeError):
sess.run(itr.get_next())
def testNoShuffle(self):
filenames = ['a', 'b', 'c']
self._touchTempFiles(filenames)
# Repeat the list twice and ensure that the order is the same each time.
# NOTE(mrry): This depends on an implementation detail of `list_files()`,
# which is that the list of files is captured when the iterator is
# initialized. Otherwise, or if e.g. the iterator were initialized more than
# once, it's possible that the non-determinism of `tf.matching_files()`
# would cause this test to fail. However, it serves as a useful confirmation
# that the `shuffle=False` argument is working as intended.
# TODO(b/73959787): Provide some ordering guarantees so that this test is
# more meaningful.
dataset = dataset_ops.Dataset.list_files(
path.join(self.tmp_dir, '*'), shuffle=False).repeat(2)
with self.test_session() as sess:
itr = dataset.make_one_shot_iterator()
next_element = itr.get_next()
full_filenames = []
produced_filenames = []
for filename in filenames * 2:
full_filenames.append(
compat.as_bytes(path.join(self.tmp_dir, filename)))
produced_filenames.append(compat.as_bytes(sess.run(next_element)))
with self.assertRaises(errors.OutOfRangeError):
sess.run(itr.get_next())
self.assertItemsEqual(full_filenames, produced_filenames)
self.assertEqual(produced_filenames[:len(filenames)],
produced_filenames[len(filenames):])
if __name__ == '__main__':
test.main()
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