56 lines
1.9 KiB
Python
56 lines
1.9 KiB
Python
# Copyright 2019 The TensorFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ==============================================================================
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"""Tests for python_lang_utils module."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from tensorflow.python.autograph.operators import variables
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from tensorflow.python.platform import test
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class SpecialValuesTest(test.TestCase):
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def test_undefined(self):
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undefined_symbol = variables.Undefined('name')
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undefined_symbol2 = variables.Undefined('name')
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self.assertEqual(undefined_symbol.symbol_name, 'name')
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self.assertEqual(undefined_symbol2.symbol_name, 'name')
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self.assertNotEqual(undefined_symbol, undefined_symbol2)
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def test_undefined_operations(self):
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undefined_symbol = variables.Undefined('name')
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self.assertIsInstance(undefined_symbol.foo, variables.Undefined)
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self.assertIsInstance(undefined_symbol[0], variables.Undefined)
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self.assertNotIsInstance(undefined_symbol.__class__, variables.Undefined)
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def test_read(self):
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self.assertEqual(variables.ld(1), 1)
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o = object()
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self.assertEqual(variables.ld(o), o)
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self.assertIsNone(variables.ld(None))
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def test_read_undefined(self):
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with self.assertRaisesRegex(UnboundLocalError, 'used before assignment'):
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variables.ld(variables.Undefined('a'))
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if __name__ == '__main__':
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test.main()
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