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debian: support building a single deb for multiple py3 versions...
debian: support building a single deb for multiple py3 versions Around transitions from one python minor version to another (such as 3.7 to 3.8), the current packaging can be slightly problematic - it produces a `control` file that requires that the version of `python3` that's installed be exactly the one that was used on the build machine for the `mercurial` package, by containing a line like: Depends: sensible-utils, libc6 (>= 2.14), python3 (<< 3.8), python3 (>= 3.7~), python3:any (>= 3.5~) This is because it "knows" we only built for v3.7, which is the current default on my system. By building the native components for multiple versions, we can make it produce a line like this, which is compatible with 3.7 AND 3.8: Depends: sensible-utils, libc6 (>= 2.14), python3 (<< 3.9), python3 (>= 3.7~), python3:any (>= 3.5~) This isn't *normally* required, so I'm not making it the default. For those that receive their python3 and mercurial packages from their distro, and/or don't have to worry about a situation where the team that manages the python3 installation isn't the same as the team that manages the mercurial installation, this is probably not necessary. I chose the names `DEB_HG_*` because `DEB_*` is passed through `debuild` automatically (otherwise we'd have to explicitly allow the options through, which is a nuisance), and the `HG` part is to make it clear that this isn't a "standard" debian option that other packages might respect. Test Plan: 1. "nothing changed": - built a deb without these changes - built a deb with these changes but everything at the default - used diffoscope to compare, all differences were due to timestamps 2. "explicit is the same as implicit" (single version) - built a deb with everything at the default - built a deb with DEB_HG_PYTHON_VERSIONS=3.7 - used diffoscope to compare, all differences were due to timestamps 3. "explicit is the same as implicit" (multi version) - built a deb with DEB_HG_MULTI_VERSION=1 - built a deb with DEB_HG_PYTHON_VERSIONS=3.7 - used diffoscope to compare, all differences were due to timestamps 4. (single version, 3.7) doesn't work with python3.8 - `/usr/bin/python3.7 /usr/bin/hg debuginstall` works - `/usr/bin/python3.8 /usr/bin/hg debuginstall` crashes 5. (multi version, 3.7 + 3.8) - `/usr/bin/python3.7 /usr/bin/hg debuginstall` works - `/usr/bin/python3.8 /usr/bin/hg debuginstall` works Differential Revision: https://phab.mercurial-scm.org/D8642
Gregory Szorc - - Load All Authors

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test_data_structures.py
255 lines | 8.9 KiB | text/x-python | PythonLexer
/ contrib / python-zstandard / tests / test_data_structures.py
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import sys
import unittest
import zstandard as zstd
from .common import (
make_cffi,
TestCase,
)
@make_cffi
class TestCompressionParameters(TestCase):
def test_bounds(self):
zstd.ZstdCompressionParameters(
window_log=zstd.WINDOWLOG_MIN,
chain_log=zstd.CHAINLOG_MIN,
hash_log=zstd.HASHLOG_MIN,
search_log=zstd.SEARCHLOG_MIN,
min_match=zstd.MINMATCH_MIN + 1,
target_length=zstd.TARGETLENGTH_MIN,
strategy=zstd.STRATEGY_FAST,
)
zstd.ZstdCompressionParameters(
window_log=zstd.WINDOWLOG_MAX,
chain_log=zstd.CHAINLOG_MAX,
hash_log=zstd.HASHLOG_MAX,
search_log=zstd.SEARCHLOG_MAX,
min_match=zstd.MINMATCH_MAX - 1,
target_length=zstd.TARGETLENGTH_MAX,
strategy=zstd.STRATEGY_BTULTRA2,
)
def test_from_level(self):
p = zstd.ZstdCompressionParameters.from_level(1)
self.assertIsInstance(p, zstd.CompressionParameters)
self.assertEqual(p.window_log, 19)
p = zstd.ZstdCompressionParameters.from_level(-4)
self.assertEqual(p.window_log, 19)
def test_members(self):
p = zstd.ZstdCompressionParameters(
window_log=10,
chain_log=6,
hash_log=7,
search_log=4,
min_match=5,
target_length=8,
strategy=1,
)
self.assertEqual(p.window_log, 10)
self.assertEqual(p.chain_log, 6)
self.assertEqual(p.hash_log, 7)
self.assertEqual(p.search_log, 4)
self.assertEqual(p.min_match, 5)
self.assertEqual(p.target_length, 8)
self.assertEqual(p.compression_strategy, 1)
p = zstd.ZstdCompressionParameters(compression_level=2)
self.assertEqual(p.compression_level, 2)
p = zstd.ZstdCompressionParameters(threads=4)
self.assertEqual(p.threads, 4)
p = zstd.ZstdCompressionParameters(
threads=2, job_size=1048576, overlap_log=6
)
self.assertEqual(p.threads, 2)
self.assertEqual(p.job_size, 1048576)
self.assertEqual(p.overlap_log, 6)
self.assertEqual(p.overlap_size_log, 6)
p = zstd.ZstdCompressionParameters(compression_level=-1)
self.assertEqual(p.compression_level, -1)
p = zstd.ZstdCompressionParameters(compression_level=-2)
self.assertEqual(p.compression_level, -2)
p = zstd.ZstdCompressionParameters(force_max_window=True)
self.assertEqual(p.force_max_window, 1)
p = zstd.ZstdCompressionParameters(enable_ldm=True)
self.assertEqual(p.enable_ldm, 1)
p = zstd.ZstdCompressionParameters(ldm_hash_log=7)
self.assertEqual(p.ldm_hash_log, 7)
p = zstd.ZstdCompressionParameters(ldm_min_match=6)
self.assertEqual(p.ldm_min_match, 6)
p = zstd.ZstdCompressionParameters(ldm_bucket_size_log=7)
self.assertEqual(p.ldm_bucket_size_log, 7)
p = zstd.ZstdCompressionParameters(ldm_hash_rate_log=8)
self.assertEqual(p.ldm_hash_every_log, 8)
self.assertEqual(p.ldm_hash_rate_log, 8)
def test_estimated_compression_context_size(self):
p = zstd.ZstdCompressionParameters(
window_log=20,
chain_log=16,
hash_log=17,
search_log=1,
min_match=5,
target_length=16,
strategy=zstd.STRATEGY_DFAST,
)
# 32-bit has slightly different values from 64-bit.
self.assertAlmostEqual(
p.estimated_compression_context_size(), 1294464, delta=400
)
def test_strategy(self):
with self.assertRaisesRegex(
ValueError, "cannot specify both compression_strategy"
):
zstd.ZstdCompressionParameters(strategy=0, compression_strategy=0)
p = zstd.ZstdCompressionParameters(strategy=2)
self.assertEqual(p.compression_strategy, 2)
p = zstd.ZstdCompressionParameters(strategy=3)
self.assertEqual(p.compression_strategy, 3)
def test_ldm_hash_rate_log(self):
with self.assertRaisesRegex(
ValueError, "cannot specify both ldm_hash_rate_log"
):
zstd.ZstdCompressionParameters(
ldm_hash_rate_log=8, ldm_hash_every_log=4
)
p = zstd.ZstdCompressionParameters(ldm_hash_rate_log=8)
self.assertEqual(p.ldm_hash_every_log, 8)
p = zstd.ZstdCompressionParameters(ldm_hash_every_log=16)
self.assertEqual(p.ldm_hash_every_log, 16)
def test_overlap_log(self):
with self.assertRaisesRegex(
ValueError, "cannot specify both overlap_log"
):
zstd.ZstdCompressionParameters(overlap_log=1, overlap_size_log=9)
p = zstd.ZstdCompressionParameters(overlap_log=2)
self.assertEqual(p.overlap_log, 2)
self.assertEqual(p.overlap_size_log, 2)
p = zstd.ZstdCompressionParameters(overlap_size_log=4)
self.assertEqual(p.overlap_log, 4)
self.assertEqual(p.overlap_size_log, 4)
@make_cffi
class TestFrameParameters(TestCase):
def test_invalid_type(self):
with self.assertRaises(TypeError):
zstd.get_frame_parameters(None)
# Python 3 doesn't appear to convert unicode to Py_buffer.
if sys.version_info[0] >= 3:
with self.assertRaises(TypeError):
zstd.get_frame_parameters(u"foobarbaz")
else:
# CPython will convert unicode to Py_buffer. But CFFI won't.
if zstd.backend == "cffi":
with self.assertRaises(TypeError):
zstd.get_frame_parameters(u"foobarbaz")
else:
with self.assertRaises(zstd.ZstdError):
zstd.get_frame_parameters(u"foobarbaz")
def test_invalid_input_sizes(self):
with self.assertRaisesRegex(
zstd.ZstdError, "not enough data for frame"
):
zstd.get_frame_parameters(b"")
with self.assertRaisesRegex(
zstd.ZstdError, "not enough data for frame"
):
zstd.get_frame_parameters(zstd.FRAME_HEADER)
def test_invalid_frame(self):
with self.assertRaisesRegex(zstd.ZstdError, "Unknown frame descriptor"):
zstd.get_frame_parameters(b"foobarbaz")
def test_attributes(self):
params = zstd.get_frame_parameters(zstd.FRAME_HEADER + b"\x00\x00")
self.assertEqual(params.content_size, zstd.CONTENTSIZE_UNKNOWN)
self.assertEqual(params.window_size, 1024)
self.assertEqual(params.dict_id, 0)
self.assertFalse(params.has_checksum)
# Lowest 2 bits indicate a dictionary and length. Here, the dict id is 1 byte.
params = zstd.get_frame_parameters(zstd.FRAME_HEADER + b"\x01\x00\xff")
self.assertEqual(params.content_size, zstd.CONTENTSIZE_UNKNOWN)
self.assertEqual(params.window_size, 1024)
self.assertEqual(params.dict_id, 255)
self.assertFalse(params.has_checksum)
# Lowest 3rd bit indicates if checksum is present.
params = zstd.get_frame_parameters(zstd.FRAME_HEADER + b"\x04\x00")
self.assertEqual(params.content_size, zstd.CONTENTSIZE_UNKNOWN)
self.assertEqual(params.window_size, 1024)
self.assertEqual(params.dict_id, 0)
self.assertTrue(params.has_checksum)
# Upper 2 bits indicate content size.
params = zstd.get_frame_parameters(
zstd.FRAME_HEADER + b"\x40\x00\xff\x00"
)
self.assertEqual(params.content_size, 511)
self.assertEqual(params.window_size, 1024)
self.assertEqual(params.dict_id, 0)
self.assertFalse(params.has_checksum)
# Window descriptor is 2nd byte after frame header.
params = zstd.get_frame_parameters(zstd.FRAME_HEADER + b"\x00\x40")
self.assertEqual(params.content_size, zstd.CONTENTSIZE_UNKNOWN)
self.assertEqual(params.window_size, 262144)
self.assertEqual(params.dict_id, 0)
self.assertFalse(params.has_checksum)
# Set multiple things.
params = zstd.get_frame_parameters(
zstd.FRAME_HEADER + b"\x45\x40\x0f\x10\x00"
)
self.assertEqual(params.content_size, 272)
self.assertEqual(params.window_size, 262144)
self.assertEqual(params.dict_id, 15)
self.assertTrue(params.has_checksum)
def test_input_types(self):
v = zstd.FRAME_HEADER + b"\x00\x00"
mutable_array = bytearray(len(v))
mutable_array[:] = v
sources = [
memoryview(v),
bytearray(v),
mutable_array,
]
for source in sources:
params = zstd.get_frame_parameters(source)
self.assertEqual(params.content_size, zstd.CONTENTSIZE_UNKNOWN)
self.assertEqual(params.window_size, 1024)
self.assertEqual(params.dict_id, 0)
self.assertFalse(params.has_checksum)