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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 LMDBDatasetOp."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import os
import shutil
from tensorflow.contrib.data.python.ops import readers
from tensorflow.python.framework import constant_op
from tensorflow.python.framework import dtypes
from tensorflow.python.framework import errors
from tensorflow.python.platform import test
from tensorflow.python.util import compat
prefix_path = "tensorflow/core/lib"
class LMDBDatasetTest(test.TestCase):
def setUp(self):
super(LMDBDatasetTest, self).setUp()
# Copy database out because we need the path to be writable to use locks.
path = os.path.join(prefix_path, "lmdb", "testdata", "data.mdb")
self.db_path = os.path.join(self.get_temp_dir(), "data.mdb")
shutil.copy(path, self.db_path)
def testReadFromFile(self):
filename = self.db_path
filenames = constant_op.constant([filename], dtypes.string)
num_repeats = 2
dataset = readers.LMDBDataset(filenames).repeat(num_repeats)
iterator = dataset.make_initializable_iterator()
init_op = iterator.initializer
get_next = iterator.get_next()
with self.cached_session() as sess:
sess.run(init_op)
for _ in range(num_repeats): # Dataset is repeated.
for i in range(10): # 10 records.
k = compat.as_bytes(str(i))
v = compat.as_bytes(str(chr(ord("a") + i)))
self.assertEqual((k, v), sess.run(get_next))
with self.assertRaises(errors.OutOfRangeError):
sess.run(get_next)
if __name__ == "__main__":
test.main()
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