upstream/mercurial-mirror Files · contrib/python-zstandard/tests/test_module_attributes.py

smartset: split generatorset classes to avoid cycle...

smartset: split generatorset classes to avoid cycle I uncovered a cycle manifesting in a memory leak by running `hgperfrevset '::tip'`. The cycle was due to generatorset.__init__ assigning a bound method to self.__contains__. Internet sleuthing revealed that assigning a bound method to an instance attribute always creates a cycle. This commit creates two new variants of generatorset for the special cases of ascending and descending generators. The special implementations of __contains__ have been extracted to these classes where they are defined as __contains__. generatorset now implements __new__ and changes the spawned type to one of the new classes if needed. Differential Revision: https://phab.mercurial-scm.org/D1780

Gregory Szorc - - Load All Authors

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      from __future__ import unicode_literals

      try:

          import unittest2 as unittest

      except ImportError:

          import unittest

      import zstd

      from . common import (

          make_cffi,

      )

      @make_cffi

      class TestModuleAttributes(unittest.TestCase):

          def test_version(self):

              self.assertEqual(zstd.ZSTD_VERSION, (1, 1, 3))

          def test_constants(self):

              self.assertEqual(zstd.MAX_COMPRESSION_LEVEL, 22)

              self.assertEqual(zstd.FRAME_HEADER, b'\x28\xb5\x2f\xfd')

          def test_hasattr(self):

              attrs = (

                  'COMPRESSION_RECOMMENDED_INPUT_SIZE',

                  'COMPRESSION_RECOMMENDED_OUTPUT_SIZE',

                  'DECOMPRESSION_RECOMMENDED_INPUT_SIZE',

                  'DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE',

                  'MAGIC_NUMBER',

                  'WINDOWLOG_MIN',

                  'WINDOWLOG_MAX',

                  'CHAINLOG_MIN',

                  'CHAINLOG_MAX',

                  'HASHLOG_MIN',

                  'HASHLOG_MAX',

                  'HASHLOG3_MAX',

                  'SEARCHLOG_MIN',

                  'SEARCHLOG_MAX',

                  'SEARCHLENGTH_MIN',

                  'SEARCHLENGTH_MAX',

                  'TARGETLENGTH_MIN',

                  'TARGETLENGTH_MAX',

                  'STRATEGY_FAST',

                  'STRATEGY_DFAST',

                  'STRATEGY_GREEDY',

                  'STRATEGY_LAZY',

                  'STRATEGY_LAZY2',

                  'STRATEGY_BTLAZY2',

                  'STRATEGY_BTOPT',

              )

              for a in attrs:

                  self.assertTrue(hasattr(zstd, a), a)

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				from __future__ import unicode_literals

				try:
				import unittest2 as unittest
				except ImportError:
				import unittest

				import zstd

				from . common import (
				make_cffi,
				)


				@make_cffi
				class TestModuleAttributes(unittest.TestCase):
				def test_version(self):
				self.assertEqual(zstd.ZSTD_VERSION, (1, 1, 3))

				def test_constants(self):
				self.assertEqual(zstd.MAX_COMPRESSION_LEVEL, 22)
				self.assertEqual(zstd.FRAME_HEADER, b'\x28\xb5\x2f\xfd')

				def test_hasattr(self):
				attrs = (
				'COMPRESSION_RECOMMENDED_INPUT_SIZE',
				'COMPRESSION_RECOMMENDED_OUTPUT_SIZE',
				'DECOMPRESSION_RECOMMENDED_INPUT_SIZE',
				'DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE',
				'MAGIC_NUMBER',
				'WINDOWLOG_MIN',
				'WINDOWLOG_MAX',
				'CHAINLOG_MIN',
				'CHAINLOG_MAX',
				'HASHLOG_MIN',
				'HASHLOG_MAX',
				'HASHLOG3_MAX',
				'SEARCHLOG_MIN',
				'SEARCHLOG_MAX',
				'SEARCHLENGTH_MIN',
				'SEARCHLENGTH_MAX',
				'TARGETLENGTH_MIN',
				'TARGETLENGTH_MAX',
				'STRATEGY_FAST',
				'STRATEGY_DFAST',
				'STRATEGY_GREEDY',
				'STRATEGY_LAZY',
				'STRATEGY_LAZY2',
				'STRATEGY_BTLAZY2',
				'STRATEGY_BTOPT',
				)

				for a in attrs:
				self.assertTrue(hasattr(zstd, a), a)