upstream/mercurial-mirror Files · contrib/python-zstandard/tests/test_estimate_sizes.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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      try:

          import unittest2 as unittest

      except ImportError:

          import unittest

      import zstd

      from . common import (

          make_cffi,

      )

      @make_cffi

      class TestSizes(unittest.TestCase):

          def test_decompression_size(self):

              size = zstd.estimate_decompression_context_size()

              self.assertGreater(size, 100000)

          def test_compression_size(self):

              params = zstd.get_compression_parameters(3)

              size = zstd.estimate_compression_context_size(params)

              self.assertGreater(size, 100000)

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				try:
				import unittest2 as unittest
				except ImportError:
				import unittest

				import zstd

				from . common import (
				make_cffi,
				)


				@make_cffi
				class TestSizes(unittest.TestCase):
				def test_decompression_size(self):
				size = zstd.estimate_decompression_context_size()
				self.assertGreater(size, 100000)

				def test_compression_size(self):
				params = zstd.get_compression_parameters(3)
				size = zstd.estimate_compression_context_size(params)
				self.assertGreater(size, 100000)