| # 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 `tf.data.Dataset.__len__()`.""" |
| from __future__ import absolute_import |
| from __future__ import division |
| from __future__ import print_function |
| |
| from absl.testing import parameterized |
| |
| from tensorflow.python.data.kernel_tests import test_base |
| from tensorflow.python.data.ops import dataset_ops |
| from tensorflow.python.framework import combinations |
| from tensorflow.python.platform import test |
| |
| |
| class LenTest(test_base.DatasetTestBase, parameterized.TestCase): |
| |
| @combinations.generate(test_base.eager_only_combinations()) |
| def testKnown(self): |
| num_elements = 10 |
| ds = dataset_ops.Dataset.range(num_elements) |
| self.assertLen(ds, 10) |
| |
| @combinations.generate(test_base.eager_only_combinations()) |
| def testInfinite(self): |
| num_elements = 10 |
| ds = dataset_ops.Dataset.range(num_elements).repeat() |
| with self.assertRaisesRegex(TypeError, 'infinite'): |
| len(ds) |
| |
| @combinations.generate(test_base.eager_only_combinations()) |
| def testUnknown(self): |
| num_elements = 10 |
| ds = dataset_ops.Dataset.range(num_elements).filter(lambda x: True) |
| with self.assertRaisesRegex(TypeError, 'unknown'): |
| len(ds) |
| |
| @combinations.generate(test_base.graph_only_combinations()) |
| def testGraphMode(self): |
| num_elements = 10 |
| ds = dataset_ops.Dataset.range(num_elements) |
| with self.assertRaisesRegex(TypeError, 'not supported while tracing'): |
| len(ds) |
| |
| |
| if __name__ == '__main__': |
| test.main() |